JP3328174B2

JP3328174B2 - Prepaid card system, recording device, prepaid card, card reissue device and prepaid card reissue method

Info

Publication number: JP3328174B2
Application number: JP26141297A
Authority: JP
Inventors: 俊夫黒井; 隆之鎌田
Original assignee: NTT Data Corp
Current assignee: NTT Data Group Corp
Priority date: 1997-09-26
Filing date: 1997-09-26
Publication date: 2002-09-24
Anticipated expiration: 2017-09-26
Also published as: JPH11102463A

Description

DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、使用済みのプリペ
イドカードを再利用できるプリペイドカードシステム、
記録装置、プリペイドカード、カード再発券装置及びプ
リペイドカード再発券方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prepaid card system capable of reusing a used prepaid card,
The present invention relates to a recording device, a prepaid card, a card reissue ticket device, and a prepaid card reissue ticket method.

【０００２】[0002]

【従来の技術】従来、プリペイドカードは、主に使い捨
ての形態を取っている。これに対し、資源の有効活用の
ため、プリペイドカードの発行元であるカード製造工場
が使用済みのカードを回収し、再び金額情報等の初期情
報を記録して使用させるシステムが提案されている。2. Description of the Related Art Conventionally, prepaid cards are mainly in a disposable form. On the other hand, a system has been proposed in which a card manufacturing factory, which is a prepaid card issuer, collects used cards and records and uses initial information such as amount information again for effective use of resources.

【０００３】[0003]

【発明が解決しようとする課題】上記システムの場合、
店舗における使用済みカードの回収作業、店舗からカー
ド製造工場へのカードの配送、等の作業が発生し、結果
的に作業が煩雑となる。これに対し、上記の使用済みカ
ードの回収作業と再発行したカードの配送作業を必要と
しないシステムとして、例えば、使用済みのカードに初
期情報を再び記録するための記録装置を各店舗に配置す
るシステム等が考えられる。しかし、店舗内にカード製
造工場と同等の機能（カードへの初期情報の記録）を有
する装置を設置することはセキュリティ上好ましくな
い。In the case of the above system,
Operations such as collection of used cards at stores and delivery of cards from stores to card manufacturing factories occur, resulting in complicated operations. On the other hand, as a system that does not require the above-mentioned collection of used cards and delivery of reissued cards, for example, a recording device for recording initial information on used cards again is arranged in each store. A system is conceivable. However, it is not preferable in terms of security to install an apparatus having a function (recording initial information on a card) equivalent to that of a card manufacturing factory in a store.

【０００４】本発明は、上記実状に鑑みてなされたもの
で、プリペイドカードを容易に再利用することができ、
且つ、安全性の高いプリペイドカードシステム、記録装
置、プリペイドカード、カード再発券装置及びプリペイ
ドカード再発券方法を提供することを目的とする。[0004] The present invention has been made in view of the above circumstances, and can easily reuse a prepaid card.
Another object of the present invention is to provide a highly secure prepaid card system, a recording device, a prepaid card, a card reissuing device, and a prepaid card reissuing method.

【０００５】[0005]

【課題を解決するための手段】上記目的を達成するた
め、この発明の第１の観点に係るプリペイドカードシス
テムは、金銭的価値を有する金額情報を記憶するプリペ
イドカードを使用するプリペイドカードシステムにおい
て、第１の暗号方式の暗号鍵と、第２の暗号方式の複数
の暗号鍵と、を記憶する手段と、所定回数分の金額情報
を生成する生成手段と、前記生成手段により生成された
金額情報のうち、１回目分の金額情報を前記第１の暗号
方式の暗号鍵で暗号化し、２回目分以降の各金額情報を
前記第２の暗号方式の複数の暗号鍵のうちの対応する暗
号鍵を用いて順次暗号化する暗号手段と、前記暗号手段
により暗号化された金額情報をプリペイドカードに記録
する手段と、を備える記録装置と、前記第１の暗号方式
の暗号鍵と、該第１の暗号方式の暗号鍵と対となる第１
の復号鍵と、を記憶する手段と、プリペイドカードの使
用時に、該プリペイドカードに記録されている金額情報
のうち、使用対象の金額情報を識別する識別手段と、前
記識別手段により識別された金額情報を前記第１の復号
鍵で復号化し、使用金額に応じて更新し、更新後の金額
情報を前記第１の暗号方式の暗号鍵で暗号化して該プリ
ペイドカードに記憶する更新手段と、を備える読書装置
と、前記第１の暗号方式の暗号鍵と、前記第２の暗号方
式の複数の暗号鍵と対となる複数の第２の復号鍵と、を
記憶する手段と、外部からの要求に応答して、プリペイ
ドカードに記録されている金額情報のうち、次に使用す
る金額情報を特定する特定手段と、前記特定手段により
特定された金額情報を前記複数の第２の復号鍵のうちの
適当な復号鍵を用いて復号化する復号手段と、前記復号
手段により復号化された金額情報を前記第１の暗号方式
の暗号鍵で暗号化して該プリペイドカードに記録する再
発券手段と、を備える再発券装置と、を備える。In order to achieve the above object, a prepaid card system according to a first aspect of the present invention is a prepaid card system using a prepaid card for storing monetary value information. An encryption key of the first encryption method and a plurality of encryption keys of the second encryption method
, A generating means for generating a predetermined number of times of money information, and, among the money information generated by the generating means, the first time money information is stored in the first encryption key.
Encrypted with an encryption key scheme, an encryption means for sequentially encrypted using the encryption key of each amount information after a second portion corresponding one of the plurality of encryption keys of the second encryption method, by the encryption means Means for recording encrypted amount information on a prepaid card; and a first encryption system.
And encryption key, first as a cipher key paired with the first encryption method
Means for storing a decryption key, an identification means for identifying, when the prepaid card is used, money amount information to be used among money amount information recorded on the prepaid card, and a money amount identified by the identification means. Updating means for decrypting the information with the first decryption key, updating the information in accordance with the usage amount, encrypting the updated amount information with the encryption key of the first encryption method, and storing the updated amount information in the prepaid card. A reading device, an encryption key of the first encryption method, and a second encryption method.
Means for storing a plurality of second decryption keys paired with the plurality of encryption keys of the formula, and in response to a request from the outside, among the money amount information recorded on the prepaid card, Specifying means for specifying the money amount information, decoding means for decoding the money amount information specified by the specifying means using an appropriate decoding key among the plurality of second decoding keys, and decoding by the decoding means The obtained amount information to the first encryption method
And a reissue means for encrypting with the encryption key described above and recording the encrypted information on the prepaid card.

【０００６】このような構成によれば、所定回数分の金
額情報をプリペイドカードに記憶し、例えば、１回分の
金額情報が全て使用されると、新たな１回分の金額情報
を復号化してそのカードを再発券する。これにより、同
一のプリペイドカードをリサイクル（再使用）すること
ができる。また、プリペイドカードに記憶される所定回
数の金額情報のうち、使用中の金額情報は第１の暗号方
式の暗号鍵で暗号化され、使用中の金額情報以外の未使
用の金額情報は、第２の暗号方式の暗号鍵で暗号化され
ているため、読書装置が使用できる金額情報を制限する
ことができる。これにより、システムの安全性を向上す
ることができる。According to such a configuration, the predetermined amount of money information is stored in the prepaid card, and, for example, when all the one time money information is used, the new one time money information is decoded and Reissue the card. Thereby, the same prepaid card can be recycled (reused). Also, of the predetermined number of money information stored in the prepaid card, the money information in use is the first encryption method.
Unused amount information other than the amount information in use , which is encrypted with the encryption key of the formula, is encrypted with the encryption key of the second encryption method, so that the amount information that can be used by the reading device is limited. Can be. Thereby, the security of the system can be improved.

【０００７】例えば、前記第１の暗号方式の暗号鍵と前
記第１の復号鍵とは実質上同一である。[0007] For example, the encryption key of the first encryption method and the first decryption key are substantially the same.

【０００８】前記記録装置は、前記生成手段により生成
される金額情報について、金額と回数との少なくとも一
方を外部から設定する手段を更に備えてもよい。これに
より、任意の金額と使用回数が設定されたプリペイドカ
ードを生成することができる。[0008] The recording apparatus may further include means for externally setting at least one of the amount and the number of the amount information generated by the generating unit. Thereby, a prepaid card in which an arbitrary amount and the number of times of use are set can be generated.

【０００９】また、この発明の第２の観点に係るプリペ
イドカードシステムは、少なくとも２回目分以降が複数
の暗号鍵のうちの対応する暗号鍵で順次暗号化された複
数回分の金額情報を記憶するプリペイドカードを処理す
る読書装置と再発券装置とを備えるプリペイドカードシ
ステムであって、前記読書装置は、プリペイドカードの
使用時に、該プリペイドカードに記録されている複数回
分の金額情報のうち、使用対象の金額情報を識別する識
別手段と、前記識別手段により識別された金額情報を使
用金額に応じて更新し、該プリペイドカードに記憶する
更新手段と、を備え、前記再発券装置は、複数の復号鍵
を記憶する手段と、プリペイドカードに記憶されている
複数回分の金額情報のうち、次に使用する金額情報を特
定する特定手段と、前記特定手段により特定された金額
情報を前記複数の復号鍵のうち適当な復号鍵を用いて復
号化する復号手段と、前記復号手段により復号化された
金額情報を該プリペイドカードに記録する再発券手段
と、を備える。Further, in the prepaid card system according to a second aspect of the present invention, at least the second and subsequent times, the money amount information for a plurality of times sequentially encrypted with a corresponding one of the plurality of encryption keys is stored. A prepaid card system comprising a reading device for processing a prepaid card and a reissue ticket device, wherein the reading device, when using the prepaid card, includes information on a usage target among a plurality of amount information recorded on the prepaid card. Identification means for identifying the amount of money information, and updating means for updating the amount of money information identified by the identification means according to the usage amount and storing the updated information in the prepaid card. Means for storing the key, and specifying means for specifying the money amount information to be used next among the money amount information for a plurality of times stored in the prepaid card. Decryption means for decrypting the price information specified by the specification means using an appropriate decryption key among the plurality of decryption keys; and a reissue ticket for recording the price information decrypted by the decryption means on the prepaid card Means.

【００１０】このような構成によれば、所定回数分の金
額情報が暗号化されて記憶されたプリペイドカードにお
いて、例えば、１回分の金額情報が全て使用されると、
新たな１回分の金額情報を復号化してそのカードを再発
券する。これにより、同一のプリペイドカードをリサイ
クル（再使用）することができる。また、プリペイドカ
ードに記憶される所定回数の金額情報のうち、使用中の
金額情報以外の未使用の金額情報は暗号化されているた
め、読書装置が使用できる金額情報を制限することがで
きる。これにより、システムの安全性を向上することが
できる。According to such a configuration, in the prepaid card in which the predetermined amount of money information is encrypted and stored, for example, when all the money information for one time is used,
The new one-time amount information is decrypted and the card is reissued. Thereby, the same prepaid card can be recycled (reused). In addition, among the predetermined number of money information stored in the prepaid card, unused money information other than the used money information is encrypted, so that the money information that can be used by the reading device can be limited. Thereby, the security of the system can be improved.

【００１１】前記読書装置は、読書用暗号鍵と、該読書
用暗号鍵と対となる読書用復号鍵と、を記憶してもよ
く、前記再発券装置は、前記読書用暗号鍵を記憶しても
よく、前記読書装置の前記更新手段は、１回目分の金額
情報が前記読書用暗号鍵で予め暗号化されているプリペ
イドカードの使用時において、前記識別手段により識別
された金額情報を前記読書用復号鍵で復号化して更新
し、更新された金額情報を前記読書用暗号鍵で暗号化し
て該プリペイドカードに記憶する手段を備えてもよく、
前記再発券装置の前記再発券手段は、前記復号手段によ
り復号化された金額情報を前記読書用暗号鍵で暗号化し
て該プリペイドカードに記録する手段を備えてもよい。
これにより、使用中の金額情報に対しても暗号処理が成
されるため、システムの安全性を向上することができ
る。[0011] The reading device may store a reading encryption key and a reading decryption key paired with the reading encryption key, and the reissue ticket device stores the reading encryption key. The updating unit of the reading device may be configured such that, when a prepaid card is used in which the first-time amount information is previously encrypted with the reading encryption key, the amount information identified by the identification unit is used. A means for decrypting and updating with the reading decryption key and encrypting the updated amount information with the reading encryption key and storing the same in the prepaid card may be provided.
The reissue ticket means of the reissue ticket device may include means for encrypting the amount information decrypted by the decryption means with the reading encryption key and recording the information on the prepaid card.
As a result, the cryptographic process is performed on the in-use amount information, so that the security of the system can be improved.

【００１２】前記再発券装置の前記特定手段は、プリペ
イドカードにおいて最近使用された金額情報の残金が無
いことを確認した後、次に使用する金額情報を特定する
手段を備えてもよい。また、前記再発券装置の前記特定
手段は、所定金額相当の現金の投入に応じて、次に使用
する金額情報を特定する手段を備えてもよい。[0012] The specifying means of the reissue ticket device may include means for specifying the amount information to be used next after confirming that there is no remaining money amount information recently used in the prepaid card. Further, the specifying means of the reissue ticket device may include a means for specifying money amount information to be used next in response to the insertion of cash equivalent to a predetermined amount.

【００１３】前記読書装置と前記再発券装置の少なくと
も一方は、前記プリペイドカードの再使用回数を示す使
用回数情報を該プリペイドカードに記録する手段を更に
備えてもよく、前記読書装置の前記識別手段は、プリペ
イドカードに記憶されている前記使用回数情報を参照
し、該プリペイドカードに記録されている金額情報のう
ち、使用対象の金額情報を識別する手段を更に備えても
よく、前記再発券装置の前記特定手段は、プリペイドカ
ードに記憶されている前記使用回数情報を参照し、該プ
リペイドカードに記憶されている金額情報のうち、次に
使用する金額情報を特定する特定手段を更に備えてもよ
い。[0013] At least one of the reading device and the reissue ticket device may further include means for recording, on the prepaid card, usage count information indicating the number of times the prepaid card is reused, and the identification means of the reading device. May further comprise means for referring to the number-of-uses information stored in the prepaid card, and identifying money information to be used among the money information recorded on the prepaid card. The specifying means may further include a specifying means for referring to the number-of-uses information stored in the prepaid card and specifying the next money information among the money information stored in the prepaid card. Good.

【００１４】また、この発明の第３の観点に係るプリペ
イドカードシステムは、金銭的価値を有する金額情報を
記憶するプリペイドカードを使用するプリペイドカード
システムにおいて、第１の暗号方式の暗号鍵と第２の暗
号方式の暗号鍵を記憶する手段と、所定回数分の金額情
報を生成する生成手段と、前記生成手段により生成され
た金額情報のうち、１回目分の金額情報を前記第１の暗
号方式の暗号鍵で暗号化し、２回目分以降の金額情報を
前記第２の暗号方式の暗号鍵で暗号化する暗号手段と、
前記暗号手段により暗号化された金額情報をプリペイド
カードに記録する手段と、を備える記録装置と、前記第
１の暗号方式の暗号鍵と、該第１の暗号方式の暗号鍵と
対となる第１の復号鍵と、を記憶する手段と、プリペイ
ドカードの使用時に、該プリペイドカードに記録されて
いる金額情報のうち、使用対象の金額情報を識別する識
別手段と、前記識別手段により識別された金額情報を前
記第１の暗号方式の暗号鍵で復号化する復号手段と、前
記復号手段により復号化された金額情報を使用金額に応
じて更新する更新手段と、更新された金額情報を前記第
１の暗号方式の暗号鍵で暗号化し、該プリペイドカード
に記録する手段と、を備える読書装置と、前記第１の暗
号方式の暗号鍵と、前記第２の暗号方式の暗号鍵と対と
なる第２の復号鍵と、を記憶する手段と、所定金額相当
の現金の投入に応答して、プリペイドカードに記録され
ている金額情報のうち、次に使用する金額情報を特定す
る特定手段と、前記特定手段により特定された金額情報
を前記第２の復号鍵で復号化する金額復号手段と、前記
金額復号手段により復号化された金額情報を前記第１の
暗号方式の暗号鍵で暗号化し、該プリペイドカードに記
録する手段と、を備える再発券装置と、を備える。Further, the prepaid card system according to a third aspect of the invention, the prepaid card system using a prepaid card for storing amount information having monetary value, the encryption key and the second first encryption method Darkness
Means for storing an encryption key of No. scheme, and generating means for generating money information of a predetermined number of times, among the money amount information generated by the generating means, dark said first money amount information of the first content
Encryption means for encrypting with the encryption key of the second encryption method and encrypting the money amount information for the second and subsequent times with the encryption key of the second encryption method ;
A recording apparatus comprising: means, a recording the amount of money information is encrypted prepaid card by the encryption unit, the encryption key of the first encryption method, first the encryption key paired with the encryption method of the first Means for storing the first decryption key, identification means for identifying, when the prepaid card is used, money amount information to be used, among the money amount information recorded on the prepaid card, Decryption means for decrypting the price information with the encryption key of the first encryption method; updating means for updating the price information decrypted by the decryption means in accordance with the usage amount; 1 encrypted with encryption key encryption method, a reading device and means for recording on the prepaid card, the first dark
And encryption key No. scheme, means for storing a second decryption key to be encryption key paired with the second encryption method, in response to the introduction of a predetermined amount in cash, is recorded in the prepaid card The money amount information to be used next among the money amount information, the money amount decryption means for decrypting the money amount information specified by the specification means with the second decryption key, and the money amount decryption means The decrypted amount information is stored in the first
Encrypted with an encryption key of the encryption method, and a recurrence ticket and means for recording on the prepaid card.

【００１５】このような構成によれば、所定回数分の金
額情報が暗号化されて記憶されたプリペイドカードにお
いて、例えば、１回分の金額情報が全て使用されると、
新たな１回分の金額情報を復号化してそのカードを再発
券する。これにより、同一のプリペイドカードをリサイ
クル（再使用）することができる。また、プリペイドカ
ードに記憶される所定回数の金額情報のうち、使用中の
金額情報は第１の暗号方式の暗号鍵で暗号化され、使用
中の金額情報以外の未使用の金額情報は、第２の暗号方
式の暗号鍵で暗号化されているため、読書装置が使用で
きる金額情報を制限することができる。これにより、シ
ステムの安全性を向上することができる。また、使用中
の金額情報に対しても第１の暗号鍵を用いた暗号処理が
成されるため、システムの安全性を向上することができ
る。According to such a configuration, in the prepaid card in which the predetermined amount of money information is encrypted and stored, for example, when all the money information for one time is used,
The new one-time amount information is decrypted and the card is reissued. Thereby, the same prepaid card can be recycled (reused). Also, among the money amount information of a predetermined number of times stored in the prepaid card, in use
The amount information is encrypted with the encryption key of the first encryption method, and the unused amount information other than the amount information in use is stored in the second encryption method.
Since the information is encrypted with the encryption key of the formula, the amount information that can be used by the reading device can be limited. Thereby, the security of the system can be improved. Further, since the cryptographic process using the first cryptographic key is performed on the in-use amount information, the security of the system can be improved.

【００１６】また、この発明の第４の観点に係る記録装
置は、金銭的価値を有する金額情報を記憶するプリペイ
ドカードを発行する記録装置であって、該記録装置は、
第１の暗号方式の暗号鍵と第２の暗号方式の暗号鍵を記
憶する手段と、所定回数分の金額情報を生成する生成手
段と、前記生成手段により生成された金額情報のうち、
１回目分の金額情報を前記第１の暗号方式の暗号鍵で暗
号化し、２回目分以降の金額情報を前記第２の暗号方式
の暗号鍵で暗号化する暗号手段と、前記暗号手段により
暗号化された金額情報をプリペイドカードに記録する手
段と、を備える。A recording device according to a fourth aspect of the present invention is a recording device for issuing a prepaid card for storing money amount information having a monetary value.
Means for storing an encryption key of the first encryption method and an encryption key of the second encryption method, a generation means for generating a predetermined number of times of money information, and among the money information generated by the generation means,
The first amount information is encrypted with the encryption key of the first encryption system , and the second and subsequent amount information is encrypted with the second encryption system.
Comprising of an encryption means for encrypting the encryption key, and means for recording the amount of money information is encrypted prepaid card by the encryption means.

【００１７】また、この発明の第５の観点に係るプリペ
イドカードは、金銭的価値を有する金額情報を記憶する
プリペイドカードであって、該プリペイドカードは、１
回目分が第１の暗号方式の暗号鍵で暗号化されており、
２回目分以降が第２の暗号方式の複数の暗号鍵のうちの
対応するもので順次暗号化されている所定回数分の金額
情報を記憶する。Further, a prepaid card according to a fifth aspect of the present invention is a prepaid card for storing money amount information having a monetary value.
The first time is encrypted with the encryption key of the first encryption method ,
A predetermined amount of money amount information that is sequentially encrypted with a corresponding one of the plurality of encryption keys of the second encryption system in the second and subsequent times is stored.

【００１８】また、この発明の第６の観点に係るカード
再発券装置は、１回目分が第１の暗号方式の暗号鍵で暗
号化されており、２回目分以降が第２の暗号方式の複数
の暗号鍵のうちの対応するもので順次暗号化されている
所定回数分の金額情報を記憶するプリペイドカードを処
理するカード再発券装置であって、該カード再発券装置
は、前記第１の暗号方式の暗号鍵と、前記第２の暗号方
式の複数の暗号鍵と対になる複数の復号鍵を記憶する手
段と、プリペイドカードに記憶されている複数回分の金
額情報のうち、次に使用する金額情報を特定する特定手
段と、前記特定手段により特定された金額情報を前記複
数の復号鍵のうちの適当な復号鍵で復号化する復号手段
と、前記復号手段により復号化された金額情報を該プリ
ペイドカードに記録する再発券手段と、を備える。Further, in the card reissuing apparatus according to a sixth aspect of the present invention, the first time is performed by using an encryption key of the first encryption method.
And the second and subsequent times are encrypted by the second encryption method.
Are sequentially encrypted with the corresponding one of the encryption keys
A card reissue device for processing a prepaid card storing predetermined amount of money information , the card reissue device comprising an encryption key of the first encryption method and a second encryption method.
Means for storing a plurality of decryption keys that are paired with a plurality of encryption keys of the formula, specifying means for specifying the next amount of money information among a plurality of times of money information stored in the prepaid card; Decryption means for decrypting the amount information specified by the means with an appropriate decryption key of the plurality of decryption keys; reissue ticket means for recording the amount information decrypted by the decryption means on the prepaid card; Is provided.

【００１９】このような構成によれば、１回目分が第１
の暗号方式の暗号鍵で暗号化されており、２回目分以降
が第２の暗号方式の複数の暗号鍵のうちの対応するもの
で順次暗号化された所定回数分の金額情報が記憶された
プリペイドカードにおいて、例えば、１回分の金額情報
が全て使用されると、新たな１回分の金額情報を復号化
してそのカードを再発券する。これにより、同一のプリ
ペイドカードをリサイクル（再使用）することができ
る。また、カード再発券装置は、プリペイドカードにお
いて暗号化された所定回数の金額情報のうち、１回分の
金額情報のみを復号化して使用可能な状態にする。これ
により、プリペイドカードに記憶される金額情報の使用
を制限し、使用中の金額情報以外の金額情報が不正に使
用されることを防止することができる。According to such a configuration, the first time is the first time
Is encrypted with the encryption key of
Is the corresponding one of the plurality of encryption keys of the second encryption method
For example, in a prepaid card in which money information for a predetermined number of times is sequentially encrypted, when all the money information for one time is used, a new money information for one time is decrypted and the card is reissued. I do. Thereby, the same prepaid card can be recycled (reused). Also, the card reissue device decrypts only one amount of money information out of a predetermined number of times of money information encrypted in the prepaid card and makes it usable. As a result, it is possible to restrict the use of the amount information stored in the prepaid card, and to prevent the amount information other than the amount information being used from being illegally used.

【００２０】前記カード再発券装置は、プリペイドカー
ドにおいて最近使用された金額情報の残金が無いことを
確認した後、次に使用する金額情報を特定し、復号化す
る手段を備えてもよい。[0020] The card reissue card device may include means for identifying the amount information to be used next and decrypting the same after confirming that there is no remaining balance of the amount information used recently in the prepaid card.

【００２１】該カード再発券装置は、プリペイドカード
の金額情報を消費するための読書装置において使用され
る読書用暗号鍵を更に記憶してもよく、前記再発券手段
は、前記復号手段により復号化された金額情報を前記読
書用暗号鍵で暗号化して該プリペイドカードに記憶する
手段を備えてもよい。これにより、使用中の金額情報に
対しても暗号処理が成されるため、取引の安全性を向上
することができる。The card reissuing apparatus may further store a reading encryption key used in the reading apparatus for consuming the amount information of the prepaid card, and the reissue means is decrypted by the decrypting means. There may be provided means for encrypting the amount information thus set with the reading encryption key and storing the encrypted information in the prepaid card. As a result, the cryptographic process is performed on the in-use amount information, so that the security of the transaction can be improved.

【００２２】また、この発明の第７の観点に係るプリペ
イドカード再発券方法は、金額情報を記憶するプリペイ
ドカードを使用するシステムにおいて、使用済みのプリ
ペイドカードを再発券するプリペイドカード再発券方法
であって、所定回数分の金額情報を生成する生成ステッ
プと、前記生成ステップにより生成された所定回数分の
金額情報のうち、１回目分の金額情報を第１の暗号鍵で
暗号化し、２回目分以降の各金額情報を複数の第２の暗
号鍵をのうちの対応するもの用いて順次暗号化する暗号
ステップと、前記暗号ステップにより暗号化された金額
情報をプリペイドカードに記録する記録ステップと、前
記記録ステップにより所定回数分の金額情報が記録され
たプリペイドカードの使用に応じて、該プリペイドカー
ドに記録されている金額情報のうち、使用対象の金額情
報を識別する識別ステップと、前記識別ステップにより
識別された金額情報を前記第１の暗号鍵と対となる第１
の復号鍵で復号化し、使用金額に応じて更新する更新ス
テップと、前記更新ステップにより更新された金額情報
を前記第１の暗号鍵で暗号化し、該プリペイドカードに
記録する記録ステップと外部からの要求に応答して、前
記プリペイドカードにおいて最近使用された金額情報の
残金が無いことを確認する確認ステップと、前記確認ス
テップにより、前記プリペイドカードにおいて最近使用
された金額情報の残金が無いことを確認した場合、前記
プリペイドカードに記憶されている金額情報のうち、次
に使用する金額情報を特定する特定ステップと、前記特
定ステップにより特定された金額情報を前記第２の暗号
鍵と対となる第２の復号鍵により復号化する復号ステッ
プと、前記復号ステップにより復号化された金額情報を
前記第１の暗号鍵で暗号化し、該プリペイドカードに記
録する再発券ステップと、を備える。A prepaid card reissuing method according to a seventh aspect of the present invention is a prepaid card reissuing method for reissuing a used prepaid card in a system using a prepaid card storing amount information. Generating a predetermined amount of money information, and encrypting the first amount of money information with the first encryption key from the predetermined number of money information generated in the generation step, An encryption step of sequentially encrypting each amount information using a corresponding one of a plurality of second encryption keys, a recording step of recording the amount information encrypted by the encryption step on a prepaid card, According to the use of the prepaid card on which the predetermined amount of money information has been recorded in the recording step, the information is recorded on the prepaid card. Of the amount information, first the identification identifying the amount information of the object, the identification of the first encryption key paired amounts information identified in step 1
And a recording step of encrypting the amount information updated by the updating step with the first encryption key and recording the information on the prepaid card. In response to the request, a confirmation step of confirming that there is no balance of recently used amount information in the prepaid card, and the confirming step confirms that there is no balance of recently used amount information in the prepaid card. In this case, of the money amount information stored in the prepaid card, a specifying step of specifying the money amount information to be used next, and the money amount information specified by the specifying step is paired with the second encryption key. A decryption step of decrypting the amount information decrypted by the decryption step using the first encryption key. Encrypting, and a recurrence ticket step of recording on the prepaid card.

【００２３】このような構成によれば、所定回数分の金
額情報が暗号化されて記憶されたプリペイドカードにお
いて、例えば、１回分の金額情報が全て使用されると、
新たな１回分の金額情報を復号化してそのカードを再発
券する。これにより、同一のプリペイドカードをリサイ
クル（再使用）することができる。また、プリペイドカ
ードに記憶される所定回数の金額情報のうち、使用中の
金額情報以外の未使用の金額情報は第２の暗号鍵で暗号
化されているため、第２の暗号鍵を所持していない装置
（例えば、読書装置）において金額情報の使用を制限す
ることができる。また、使用中の金額情報に対しても第
１の暗号鍵により、暗号処理を行うため、安全性の高い
システムを実現できる。また、この発明の第８の観点に
かかるプリペイドカードシステムは、金銭的価値を有す
る金額情報を記憶するプリペイドカードを使用するプリ
ペイドカードシステムにおいて、第１の暗号鍵と、複数
の第２の暗号鍵と、を記憶する手段と、所定回数分の金
額情報を生成する生成手段と、前記生成手段により生成
された金額情報のうち、１回目分の金額情報を前記第１
の暗号鍵で暗号化し、２回目分以降の各金額情報を前記
複数の第２の暗号鍵のうちの対応する暗号鍵を用いて順
次暗号化する暗号手段と、前記暗号手段により暗号化さ
れた金額情報をプリペイドカードに記録する手段と、を
備える記録装置と、前記第１の暗号鍵と、該第１の暗号
鍵と対となる第１の復号鍵と、を記憶する手段と、プリ
ペイドカードの使用時に、該プリペイドカードに記録さ
れている金額情報のうち、使用対象の金額情報を識別す
る識別手段と、前記識別手段により識別された金額情報
を前記第１の復号鍵で復号化し、使用金額に応じて更新
し、更新後の金額情報を前記第１の暗号鍵で暗号化して
該プリペイドカードに記憶する更新手段と、を備える読
書装置と、前記第１の暗号鍵と、前記複数の第２の暗号
鍵と対となる複数の第２の復号鍵と、を記憶する手段
と、外部からの要求に応答して、プリペイドカードに記
録されている金額情報のうち、次に使用する金額情報を
特定する特定手段と、前記特定手段により特定された金
額情報を前記複数の第２の復号鍵のうちの適当な復号鍵
を用いて復号化する復号手段と、前記復号手段により復
号化された金額情報を前記第１の暗号鍵で暗号化して該
プリペイドカードに記録する再発券手段と、を備える再
発券装置と、を備え、前記記録装置は、前記生成手段に
より生成される金額情報について、金額と回数との少な
くとも一方を外部から設定する手段を更に備えることを
特徴とする。また、この発明の第９の観点にかかるプリ
ペイドカードシステムは、金銭的価値を有する金額情報
を記憶するプリペイドカードを使用するプリペイドカー
ドシステムにおいて、第１の暗号鍵と、複数の第２の暗
号鍵と、を記憶する手段と、所定回数分の金額情報を生
成する生成手段と、前記生成手段により生成された金額
情報のうち、１回目分の金額情報を前記第１の暗号鍵で
暗号化し、２回目分以降の各金額情報を前記複数の第２
の暗号鍵のうちの対応する暗号鍵を用いて順次暗号化す
る暗号手段と、前記暗号手段により暗号化された金額情
報をプリペイドカードに記録する手段と、を備える記録
装置と、前記第１の暗号鍵と、該第１の暗号鍵と対とな
る第１の復号鍵と、を記憶する手段と、プリペイドカー
ドの使用時に、該プリペイドカードに記録されている金
額情報のうち、使用対象の金額情報を識別する識別手段
と、前記識別手段により識別された金額情報を前記第１
の復号鍵で復号化し、使用金額に応じて更新し、更新後
の金額情報を前記第１の暗号鍵で暗号化して該プリペイ
ドカードに記憶する更新手段と、を備える読書装置と、
前記第１の暗号鍵と、前記複数の第２の暗号鍵と対とな
る複数の第２の復号鍵と、を記憶する手段と、外部から
の要求に応答して、プリペイドカードに記録されている
金額情報のうち、次に使用する金額情報を特定する特定
手段と、前記特定手段により特定された金額情報を前記
複数の第２の復号鍵のうちの適当な復号鍵を用いて復号
化する復号手段と、前記復号手段により復号化された金
額情報を前記第１の暗号鍵で暗号化して該プリペイドカ
ードに記録する再発券手段と、を備える再発券装置と、
を備え、前記再発券装置の前記特定手段は、所定金額相
当の現金の投入に応じて、次に使用する金額情報を特定
する手段を備える、ことを特徴とする。また、この発明
の第１０の観点にかかるプリペイドカードシステムは、
金銭的価値を有する金額情報を記憶するプリペイドカー
ドを使用するプリペイドカードシステムにおいて、第１
の暗号鍵と、複数の第２の暗号鍵と、を記憶する手段
と、所定回数分の金額情報を生成する生成手段と、前記
生成手段により生成された金額情報のうち、１回目分の
金額情報を前記第１の暗号鍵で暗号化し、２回目分以降
の各金額情報を前記複数の第２の暗号鍵のうちの対応す
る暗号鍵を用いて順次暗号化する暗号手段と、前記暗号
手段により暗号化された金額情報をプリペイドカードに
記録する手段と、を備える記録装置と、前記第１の暗号
鍵と、該第１の暗号鍵と対となる第１の復号鍵と、を記
憶する手段と、プリペイドカードの使用時に、該プリペ
イドカードに記録されている金額情報のうち、使用対象
の金額情報を識別する識別手段と、前記識別手段により
識別された金額情報を前記第１の復号鍵で復号化し、使
用金額に応じて更新し、更新後の金額情報を前記第１の
暗号鍵で暗号化して該プリペイドカードに記憶する更新
手段と、を備える読書装置と、前記第１の暗号鍵と、前
記複数の第２の暗号鍵と対となる複数の第２の復号鍵
と、を記憶する手段と、外部からの要求に応答して、プ
リペイドカードに記録されている金額情報のうち、次に
使用する金額情報を特定する特定手段と、前記特定手段
により特定された金額情報を前記複数の第２の復号鍵の
うちの適当な復号鍵を用いて復号化する復号手段と、前
記復号手段により復号化された金額情報を前記第１の暗
号鍵で暗号化して該プリペイドカードに記録する再発券
手段と、を備える再発券装置と、を備え、前記読書装置
と前記再発券装置の少なくとも一方は、前記プリペイド
カードの再使用回数を示す使用回数情報を該プリペイド
カードに記録する手段を更に備え、前記読書装置の前記
識別手段は、プリペイドカードに記憶されている前記使
用回数情報を参照し、該プリペイドカードに記録されて
いる金額情報のうち、使用対象の金額情報を識別する手
段を更に備え、前記再発券装置の前記特定手段は、プリ
ペイドカードに記憶されている前記使用回数情報を参照
し、該プリペイドカードに記憶されている金額情報のう
ち、次に使用する金額情報を特定する手段を更に備え
る、ことを特徴とする。また、この発明の第１１の観点
にかかる記録装置は、金銭的価値を有する金額情報を記
憶するプリペイドカードを発行する記録装置であって、
該記録装置は、第１の暗号鍵と第２の暗号鍵を記憶する
手段と、金額情報を生成する生成手段と、前記生成手段
により生成された金額情報のうち、１回目分の金額情報
を前記第１の暗号鍵で暗号化し、２回目の金額情報を前
記第２の暗号鍵で暗号化する暗号手段と、前記暗号手段
により暗号化された金額情報をプリペイドカードに記録
する手段と、を備えることを特徴とする。また、この発
明の第１２の観点にかかるプリペイドカードは、金銭的
価値を有する金額情報を記憶するプリペイドカードであ
って、該プリペイドカードは、１回目分が第１の暗号鍵
で暗号化されており、２回目分が第２の暗号鍵で暗号化
されている金額情報を記憶する、ことを特徴とする。ま
た、この発明の第１３の観点にかかるカード再発券装置
は、１回目分が第１の暗号鍵で暗号化されており、２回
目分以降が第２の暗号鍵で暗号化されている金額情報を
記憶するプリペイドカードを処理するカード再発券装置
であって、該カード再発券装置は、前記第２の暗号鍵と
対になる復号鍵を記憶する手段と、プリペイドカードに
記憶されている２回目分の金額情報を前記復号鍵で復号
化する復号手段と、前記復号手段により復号化された金
額情報を該プリペイドカードに記録する再発券手段と、
を備える、ことを特徴とする。また、この発明の第１４
の観点にかかるプリぺイドカードは、金銭的価値を有す
る金額情報を記憶するプリペイドカードであって、１回
目分が第１の暗号方式の暗号鍵で暗号化されており、２
回目分以降が第２の暗号方式の暗号鍵で暗号化されてい
る所定回数分の金額情報を記憶する。また、この発明の
第１５の観点にかかるカードは、金銭的価値を有する複
数の情報を記憶するカードであって、１回目分が第１の
暗号方式の暗号鍵で暗号化されており、２回目分以降が
第２の暗号方式の暗号鍵で暗号化されている所定回数分
の金額情報を記憶する、ことを特徴とする。また、この
発明の第１６の観点にかかるカードは、金銭的価値を有
する複数の情報を記憶するカードであって、１回目分が
第１の暗号鍵で暗号化されており、２回目分が第２の暗
号鍵で暗号化されている金銭的価値を有する情報を記憶
する、ことを特徴とする。 According to such a configuration, in the prepaid card in which the predetermined amount of money information is encrypted and stored, for example, when all the money information for one time is used,
The new one-time amount information is decrypted and the card is reissued. Thereby, the same prepaid card can be recycled (reused). In addition, among the predetermined number of money information stored in the prepaid card, unused money information other than the money information in use is encrypted with the second encryption key, and therefore, possesses the second encryption key. The use of monetary information in devices that do not (e.g., reading devices) can be limited. In addition, since the cryptographic process is performed on the in-use amount information using the first cryptographic key, a highly secure system can be realized. Further, a prepaid card system according to an eighth aspect of the present invention is a prepaid card system using a prepaid card storing money amount information having a monetary value, wherein the first encryption key and the plurality of second encryption keys are provided. Means for generating money amount information for a predetermined number of times; and, among the money amount information generated by the generation means, the first money amount information is stored in the first money amount information.
And encryption means for sequentially encrypting each amount information for the second and subsequent times using the corresponding encryption key of the plurality of second encryption keys, and A recording device comprising: means for recording amount information on a prepaid card; means for storing the first encryption key; and a first decryption key paired with the first encryption key; When using the information, among the money amount information recorded on the prepaid card, identification means for identifying the money amount information to be used, and the money amount information identified by the identification means are decrypted with the first decryption key and used. A reading device comprising: an updating unit that updates the amount information in accordance with the amount, encrypts the updated amount information with the first encryption key, and stores the updated amount information in the prepaid card; the first encryption key; Paired with the second encryption key Means for storing a second decryption key; identifying means for identifying, in response to a request from the outside, money amount information to be used next among money amount information recorded on the prepaid card; Decryption means for decrypting the price information specified by using an appropriate decryption key among the plurality of second decryption keys, and the price information decrypted by the decryption means using the first encryption key. A reissue ticket device that encrypts and records the prepaid card on the prepaid card, the reissue ticket device comprising: It is characterized by further comprising means for setting. A prepaid card system according to a ninth aspect of the present invention is a prepaid card system using a prepaid card that stores money amount information having a monetary value, wherein the first encryption key and the plurality of second encryption keys are provided. Means for generating money amount information for a predetermined number of times; and, among the money amount information generated by the generation means, encrypting the first time amount information with the first encryption key; Each of the money amount information for the second and subsequent times is stored in the plurality of second
A recording device comprising: an encryption unit for sequentially encrypting using a corresponding one of the encryption keys, and a unit for recording the amount information encrypted by the encryption unit on a prepaid card; Means for storing an encryption key and a first decryption key that is paired with the first encryption key; and, when the prepaid card is used, the amount to be used among the amount information recorded on the prepaid card. Identification means for identifying information; and the amount information identified by the identification means in the first
A reading device comprising: updating means for decrypting with the decryption key, updating the information in accordance with the usage amount, encrypting the updated amount information with the first encryption key, and storing the information in the prepaid card;
Means for storing the first encryption key and a plurality of second decryption keys that are paired with the plurality of second encryption keys; Specifying means for specifying the amount information to be used next among the used amount information, and decoding the amount information specified by the specifying means using an appropriate decryption key among the plurality of second decryption keys. A reissue ticket device comprising: decryption means; and reissue ticket means for encrypting the amount information decrypted by the decryption means with the first encryption key and recording the information on the prepaid card.
Wherein the specifying means of the reissue ticket device includes means for specifying money amount information to be used next in response to the insertion of cash equivalent to a predetermined amount. A prepaid card system according to a tenth aspect of the present invention includes:
In a prepaid card system that uses a prepaid card storing money amount information having a monetary value,
, A plurality of second encryption keys, storage means for generating the predetermined amount of money information, and a first time amount of money information generated by the generation means. Encryption means for encrypting information with the first encryption key, and sequentially encrypting each amount information for the second and subsequent times using a corresponding encryption key of the plurality of second encryption keys; and Means for recording the amount information encrypted by the method on a prepaid card, the first encryption key, and a first decryption key paired with the first encryption key. Means, when using the prepaid card, identifying means for identifying the amount information to be used among the amount information recorded on the prepaid card, and the amount information identified by the identifying means is used for the first decryption key. Decrypted and updated according to the usage amount A reading device comprising: updating means for encrypting the updated amount information with the first encryption key and storing the information in the prepaid card; the first encryption key; and the plurality of second encryption keys. Means for storing a plurality of second decryption keys forming a pair, and means for specifying next amount information to be used next among the amount information recorded on the prepaid card in response to an external request Decoding means for decoding the price information specified by the specifying means using an appropriate decryption key among the plurality of second decryption keys; and A reissue ticket device comprising: a reissue ticket means for encrypting the prepaid card with the encryption key and recording the repaid card in the prepaid card. Use frequency information shown Further comprising means for recording on the prepaid card, wherein the identification means of the reading device refers to the information on the number of times of use stored on the prepaid card; Means for identifying the amount information of the reissue ticket device, wherein the specifying means of the reissue ticket device refers to the information on the number of times of use stored in the prepaid card, and among the amount information stored in the prepaid card, And a means for specifying money amount information to be used. Further, a recording device according to an eleventh aspect of the present invention is a recording device for issuing a prepaid card for storing amount information having a monetary value,
The recording device includes: a unit that stores the first encryption key and the second encryption key; a generation unit that generates amount information; and the first amount information among the amount information generated by the generation unit. Encryption means for encrypting with the first encryption key, encrypting the second amount information with the second encryption key, and means for recording the amount information encrypted by the encryption means on a prepaid card; It is characterized by having. Also, a prepaid card according to a twelfth aspect of the present invention is a prepaid card for storing money amount information having a monetary value, and the prepaid card is encrypted with a first encryption key for a first time. And storing money amount information encrypted for the second time with the second encryption key. Further, in the card reissuing apparatus according to the thirteenth aspect of the present invention, the first time is encrypted with the first encryption key, and the second and subsequent times are encrypted with the second encryption key. What is claimed is: 1. A card reissuing apparatus for processing a prepaid card storing information, said card reissuing apparatus comprising: means for storing a decryption key paired with said second encryption key; Decryption means for decrypting the amount information for the first time with the decryption key; reissue ticket means for recording the amount information decrypted by the decryption means on the prepaid card;
It is characterized by having. Also, the fourteenth aspect of the present invention
Prepaid cards according to the point of view have monetary value
Is a prepaid card that stores amount information
The scale is encrypted with the encryption key of the first encryption method,
Have times th minute later is encrypted with an encryption key of the second encryption scheme
A predetermined amount of money information is stored. In addition, the present invention
The card according to the fifteenth aspect is a card having a monetary value.
Card for storing number information, the first time being the first
It is encrypted with the encryption key of the encryption method.
A predetermined number of times encrypted with the encryption key of the second encryption method
Is stored. Also this
The card according to the sixteenth aspect of the invention has monetary value.
Card that stores multiple pieces of information
It is encrypted with the first encryption key, and the second
Stores financial value information encrypted with a key
To be characterized.

【００２４】なお、読書装置は、プリペイドカードの使
用に応じて、玉、メダル等のゲーム媒体を供給する手段
を更に備えてもよい。The reading apparatus may further include means for supplying game media such as balls and medals in accordance with the use of the prepaid card.

【００２５】[0025]

【発明の実施の形態】本発明の実施の形態にかかるプリ
ペイドカードシステムについて以下図面を参照して説明
する。このプリペイドカードシステムは、図１に示すよ
うに、カード製造工場に設置される記録装置１１と、各
店舗に設置された読書装置１３及びリサイクル発券機１
５と、決済センタ１７と、を備える。DESCRIPTION OF THE PREFERRED EMBODIMENTS A prepaid card system according to an embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the prepaid card system includes a recording device 11 installed at a card manufacturing factory, a reading device 13 installed at each store, and a recycle ticketing machine 1.
5 and a settlement center 17.

【００２６】記録装置１１は、カード製造工場に設置さ
れ、プリペイドカードに金額情報等の初期情報を記録す
る装置であり、図２に示すように、入力部２１と、カー
ド記録部２３と、記憶部２７と、制御部２９と、を備え
る。入力部２１は、プリペイドカードの発行指示等が入
力される。カード記録部２３は、制御部２９からの指示
に応じて、プリペイドカードにデータを記録する。The recording device 11 is a device that is installed in a card manufacturing factory and records initial information such as amount information on a prepaid card. As shown in FIG. 2, an input unit 21, a card recording unit 23, and a storage unit A section 27 and a control section 29 are provided. The input unit 21 receives an instruction to issue a prepaid card and the like. The card recording unit 23 records data on a prepaid card according to an instruction from the control unit 29.

【００２７】記憶部２７は、所定数の暗号鍵ｋｅ（例え
ば、ＲＳＡ方式の秘密鍵）と、読書用暗号鍵ｋｊ（例え
ば、ＤＥＳ方式の共通鍵等）を記憶する。また、記憶部
２７は、プリペイドカードのリサイクル回数（例えば、
９９回等）、プリペイドカードに記録する１回分の金額
（設定金額）等のプリペイドカードを発行するために必
要な情報を記憶する。The storage unit 27 stores a predetermined number of encryption keys ke (for example, an RSA secret key) and a reading encryption key kj (for example, a DES secret key). The storage unit 27 stores the number of times the prepaid card is recycled (for example,
99) and information necessary for issuing a prepaid card such as the amount of money (set amount) for one time recorded on the prepaid card.

【００２８】制御部２９は、入力部２１に入力されたプ
リペイドカードの発行指示に応答して、記憶部２７に予
め設定されているリサイクル回数等の情報を参照し、そ
れをもとに所定回数分の金額情報を生成する。制御部２
９は、生成した所定回数分の金額情報を、記憶部２７に
記憶されている所定数の暗号鍵ｋｅと、読書用暗号鍵ｋ
ｊと、を用いて暗号化し、それらをプリペイドカードに
書き込むようカード記録部２３に指示する。In response to the prepaid card issuance instruction input to the input unit 21, the control unit 29 refers to information such as the number of recycles set in the storage unit 27 in advance, and based on the information, determines a predetermined number of recycles. Generates money information for minutes. Control unit 2
Reference numeral 9 denotes a predetermined number of generated money amount information, and a predetermined number of encryption keys ke stored in the storage unit 27 and a reading encryption key k.
j, and instructs the card recording unit 23 to write them into the prepaid card.

【００２９】制御部２９は、この暗号化処理において、
１回目の金額情報を読書用暗号鍵ｋｊで暗号化し、２回
目以降の金額情報を暗号鍵ｋｅで暗号化する。この２回
目以降の金額情報の暗号化では、１回分の金額情報毎に
使用する暗号鍵を変える。例えば、設定されているリサ
イクル回数が「９９回」の場合、制御部２９は、１回目
の金額情報に対して読書用暗号鍵ｋｊを用い、２回目以
降の金額情報の１つ１つに対し、それぞれ異なる暗号鍵
（ｋｅ１、ｋｅ２、・・・、ｋｅ９９）を順次用いる。
また、暗号化された各金額情報はブロック毎にプリペイ
ドカードに記録される。In this encryption processing, the control unit 29
The first amount information is encrypted with the reading encryption key kj, and the second and subsequent amount information is encrypted with the encryption key ke. In this second and subsequent encryption of the amount information, the encryption key to be used is changed for each amount information. For example, when the set number of recycles is “99”, the control unit 29 uses the reading encryption key kj for the first amount information, and uses the reading encryption key kj for each of the second and subsequent amount information. , Ke99,..., Ke99.
Further, each of the encrypted price information is recorded on the prepaid card for each block.

【００３０】読書装置１３は、各店舗に配置され、例え
ば、商品（サービス）の購入、貸出、提供等の対価の支
払の場面において、プリペイドカードが記憶する金額情
報を使用するための装置である。読書装置１３は、図３
に示すように、カード読書部３１と、記憶部３３と、制
御部３５と、通信制御部３７と、を備える。The reading device 13 is arranged in each store, and is a device for using the amount information stored in the prepaid card, for example, in the case of payment for purchase, lending, provision, etc. of a product (service). . The reading device 13 is shown in FIG.
As shown in FIG. 5, the card reading unit 31, the storage unit 33, the control unit 35, and the communication control unit 37 are provided.

【００３１】カード読書部３１は、装着されたプリペイ
ドカードに記憶されているデータの読取り及び書込みを
行う。記憶部３３は、読書用暗号鍵ｋｊを記憶する。制
御部３５は、プリペイドカードの使用時における金額情
報の更新等を行う。この更新処理の際、制御部３５は、
記憶部３３に記憶されている読書用暗号鍵ｋｊを用い
て、プリペイドカードの金額情報を暗号化／復号化す
る。また、制御部３５は、読書装置１３全体を制御す
る。通信制御部３７は、決済センタ１７との通信を制御
する。The card reading unit 31 reads and writes data stored in the attached prepaid card. The storage unit 33 stores the reading encryption key kj. The control unit 35 updates the amount information when the prepaid card is used. At the time of this update processing, the control unit 35
Using the reading encryption key kj stored in the storage unit 33, the amount information of the prepaid card is encrypted / decrypted. The control unit 35 controls the entire reading device 13. The communication control unit 37 controls communication with the settlement center 17.

【００３２】リサイクル発券機１５は、各店舗に設置さ
れ、使用済みとなったプリペイドカードを再使用できる
状態にする（再発券する）装置であり、図４に示すよう
に、現金投入部４０と、カード読書部４１と、記憶部４
３と、制御部４５と、通信制御部４７と、を備える。現
金投入部４０は、使用済みのプリペイドカードを再使用
するために利用者により投入された現金を受け取る。カ
ード読書部４１は、制御部４５からの指示に従い、プリ
ペイドカードにおけるデータの読込及び書込を行う。記
憶部４３は、例えば、読書用暗号鍵ｋｊと所定数個の復
号鍵ｋｄ（例えば、ＲＳＡ方式の公開鍵）とを記憶す
る。The recycle ticketing machine 15 is installed in each store and is a device that makes a used prepaid card reusable (reissues a ticket). As shown in FIG. , Card reading unit 41 and storage unit 4
3, a control unit 45, and a communication control unit 47. The cash input unit 40 receives cash inserted by a user in order to reuse a used prepaid card. The card reading unit 41 reads and writes data on the prepaid card according to an instruction from the control unit 45. The storage unit 43 stores, for example, a reading encryption key kj and a predetermined number of decryption keys kd (for example, an RSA public key).

【００３３】制御部４５は、使用済みのプリペイドカー
ドの再使用の要求に応じて、そのプリペイドカードに記
憶されているリサイクルされた回数を示すリサイクル回
数情報を参照する。制御部４５は、参照したリサイクル
回数情報をもとに、最近使用されたブロックに残金が無
いことを確認し、次のブロックの新たな金額情報を適当
な復号鍵ｋｄで復号化し、読書用暗号鍵ｋｊで暗号化す
る。なお、プリペイドカードは、上記リサイクル回数情
報を記憶するためのエリアを備え、制御部４５は、例え
ば、使用済みのプリペイドカードの再発行時にそのリサ
イクル回数情報を更新する（例えば、１カウントアップ
した回数を記憶する）。通信制御部４７は、決済センタ
１７との通信を制御する。In response to a request to reuse a used prepaid card, the control unit 45 refers to recycle count information indicating the number of recycles stored in the prepaid card. The control unit 45 confirms that there is no balance in the recently used block based on the referred recycle count information, decrypts the new amount information of the next block with an appropriate decryption key kd, and reads Encrypt with key kj. The prepaid card is provided with an area for storing the information on the number of times of recycling, and the control unit 45 updates the information on the number of times of recycling when a used prepaid card is reissued (for example, the number of times counted up by one. To remember). The communication control unit 47 controls communication with the settlement center 17.

【００３４】決済センタ１７は、各店舗の読書装置１３
及びリサイクル発券機１５と通信により接続されてお
り、読書装置１３とリサイクル発券機１５からの売上情
報等を受信する。また、決済センタ１７は、各店舗の読
書装置１３とリサイクル発券機１５を管理、制御する。The settlement center 17 has a reading device 13 at each store.
It is connected by communication with the recycling ticket issuing machine 15 and receives sales information and the like from the reading device 13 and the recycling ticket issuing machine 15. The settlement center 17 manages and controls the reading device 13 and the recycle ticketing machine 15 of each store.

【００３５】なお、各装置（記録装置１１、読書装置１
３、リサイクル発券機１５）がそれぞれ記憶する読書用
暗号鍵ｋｊと、複数の暗号鍵ｋｅ（ｋｅ１、ｋｅ２、
・・・、ｋｅｎ）と、復号鍵ｋｄ（ｋｄ１、ｋｄ２、
・・・、ｋｄｎ）は、例えば、図示せぬ鍵生成装置によ
り生成される。この場合、鍵生成装置は、生成した鍵を
例えばＥＥＰＲＯＭ（Electrically Erasable Programm
able ROM）等の記憶媒体に記録する。鍵が記録された記
憶媒体は、記録装置１１と読書装置１３とリサイクル発
券機１５とにそれぞれ配布され、格納される。Each device (recording device 11, reading device 1)
3, the reusable ticketing machine 15) stores a reading encryption key kj and a plurality of encryption keys ke (ke1, ke2,
..., ken) and the decryption key kd (kd1, kd2,
.., Kdn) are generated by, for example, a key generation device (not shown). In this case, the key generation device converts the generated key into, for example, an electrically erasable programmable (EEPROM).
recorded on a storage medium such as “able ROM”. The storage medium on which the key is recorded is distributed and stored in the recording device 11, the reading device 13, and the recycle ticket machine 15, respectively.

【００３６】次に、記録装置１１がプリペイドカードに
所定回数分の金額情報を記録するカード発行処理につい
て図５のフローチャートを参照して説明する。まず、管
理者等より記録装置１１の入力部２１にプリペイドカー
ドの発行指示が入力される。この入力に応答し、記録装
置１１の制御部２９は、例えば、記憶部２７に予め設定
されている「リサイクル回数」と「設定金額」を参照
し、「設定金額」と同額の金額情報を「リサイクル回
数」に１だけ加算した回数分だけ生成する（ステップＳ
１）。例えば、記憶部２７に「リサイクル回数：９９
回」、「設定金額：１０００円」と設定されている場
合、制御部２９は、１０００円の金額情報を１００（＝
９９＋１）回分生成する。Next, a card issuing process in which the recording device 11 records money information for a predetermined number of times on a prepaid card will be described with reference to the flowchart of FIG. First, a prepaid card issuance instruction is input to the input unit 21 of the recording device 11 by an administrator or the like. In response to this input, the control unit 29 of the recording device 11 refers to, for example, the “number of recycles” and the “set amount” preset in the storage unit 27, and sets the amount information of the same amount as the “set amount” to “ The number of recycles is generated by adding 1 to the number of recycles (step S
1). For example, in the storage unit 27, “the number of recyclings: 99
When “time” and “set amount: 1000 yen” are set, the control unit 29 sets the amount information of 1000 yen to 100 (=
99 + 1) times.

【００３７】次に、制御部２９は、記憶部２７に記憶さ
れている読書用暗号鍵ｋｊと複数の暗号鍵ｋｅとを用い
て、生成した所定回数分の金額情報を順次暗号化する
（ステップＳ２）。なお、この暗号化において、制御部
２９は、１回目の金額情報に対しては読書用暗号鍵ｋｊ
を使用し、２回目以降の金額情報に対しては金額情報毎
に暗号鍵ｋｅを順次変えて使用する。例えば、図６に示
すように、１００回分の金額情報（Ｍ１、Ｍ２、・・
・、Ｍ１００）を暗号化する場合、制御部２９は、１回
目の金額情報Ｍ１を読書用暗号鍵ｋｊを用いて暗号化す
る。次に、制御部２９は、２回目以降の金額情報Ｍ２、
Ｍ３、・・・、Ｍ１００を、それぞれ異なる暗号鍵ｋｅ
１、ｋｅ２、・・・、ｋｅ９９を順次用いて暗号化す
る。Next, the control unit 29 sequentially encrypts the generated money information for the predetermined number of times using the reading encryption key kj and the plurality of encryption keys ke stored in the storage unit 27 (step S1). S2). Note that, in this encryption, the control unit 29 uses the reading encryption key kj for the first amount information.
And for the second and subsequent money information, the encryption key ke is sequentially changed and used for each money information. For example, as shown in FIG. 6, money amount information (M1, M2,.
., M100), the control unit 29 encrypts the first-time amount information M1 using the reading encryption key kj. Next, the control unit 29 determines the amount information M2 for the second and subsequent times,
M3,..., M100 are each assigned a different encryption key ke.
Encrypt using 1, ke2,..., Ke99 in order.

【００３８】次に、制御部２９は、暗号化した所定回数
分の金額情報を、１回分毎に１ブロックとしてカード記
録部２３を介してプリペイドカードに書き込む（ステッ
プＳ３）。また、制御部２９は、そのプリペイドカード
において複数回数分記憶されている金額情報のうち、使
用中の金額情報を特定するため等に用いられるリサイク
ル回数情報の初期値（例えば「０回」等）をプリペイド
カードに記録する（ステップＳ４）。この場合のプリペ
イドカードの構造の一例を図７に示す。図示されるよう
に、プリペイドカードは、所定回数分の暗号化された金
額情報とリサイクル回数情報（初期値「０回」等）を記
憶する。このようにして、記録装置１１により所定回数
分の金額情報が記録されたプリペイドカードが発行され
る。Next, the control unit 29 writes the encrypted amount information of the predetermined number of times into the prepaid card via the card recording unit 23 as one block for each time (step S3). Further, the control unit 29 sets an initial value (for example, “0 times”) of the number-of-recycles information used for specifying the amount-of-use information among the amount information stored a plurality of times in the prepaid card. Is recorded on the prepaid card (step S4). FIG. 7 shows an example of the structure of the prepaid card in this case. As shown in the figure, the prepaid card stores a predetermined number of encrypted money amount information and recycling number information (initial value “0” or the like). In this way, the prepaid card in which the predetermined amount of money information is recorded by the recording device 11 is issued.

【００３９】発行されたプリペイドカードは、例えば、
各店舗に設置されている発券機（図示せず）等に格納さ
れ、利用者へ販売される。利用者は、購入したプリペイ
ドカードを各店舗に設置されている読書装置１３で使用
する。次に、プリペイドカード使用時における読書装置
１３の動作について説明する。まず、利用者は、読書装
置１３のカード読書部３１にプリペイドカードを装着し
て、例えば、図示せぬ支払ボタンを押下する。The issued prepaid card is, for example,
It is stored in a ticketing machine (not shown) or the like installed at each store and sold to users. The user uses the purchased prepaid card with the reading device 13 installed in each store. Next, the operation of the reading device 13 when using the prepaid card will be described. First, the user attaches the prepaid card to the card reading unit 31 of the reading device 13 and presses, for example, a payment button (not shown).

【００４０】これに応答して、読書装置１３の制御部３
５は、プリペイドカードに記憶されているリサイクル回
数情報を参照し、使用対象の金額情報が記憶されている
ブロック（使用対象ブロック）を特定する。制御部３５
は、例えば、リサイクル回数情報が「０回」の場合、１
番目のブロックを使用対象ブロックとみなし、リサイク
ル回数情報が「１回」の場合、２番目のブロックを使用
対象ブロックとみなし、リサイクル回数情報が「ｎ回」
を示す場合、（ｎ＋１）番目のブロックを使用対象のブ
ロックとみなす。In response, the control unit 3 of the reading device 13
Reference numeral 5 refers to the number-of-recycles information stored in the prepaid card, and specifies the block (use target block) in which the amount information of the use target is stored. Control unit 35
Is, for example, if the recycling count information is “0”, 1
If the second block is regarded as a use target block and the recycle count information is “one time”, the second block is regarded as a use target block and the recycle count information is “n” times
, The (n + 1) th block is regarded as a block to be used.

【００４１】制御部３５は、使用対象のブロックにおけ
る暗号化された金額情報を記憶部３３に記憶されている
読書用暗号鍵ｋｊで復号化し、復号化した金額情報から
支払金額を差し引くことにより、新たな金額情報を生成
（算出）する。次に、制御部３５は、新たな金額情報を
読書用暗号鍵ｋｊを用いて暗号化し、カード読書部３１
を介して、プリペイドカードの読出し元のブロックに記
憶する。このようにして、読書装置１３は、プリペイド
カード使用時にプリペイドカードに記憶されている金額
情報を更新する。The control unit 35 decrypts the encrypted amount information in the block to be used with the reading encryption key kj stored in the storage unit 33, and subtracts the payment amount from the decrypted amount information. Generate (calculate) new amount information. Next, the control unit 35 encrypts the new amount information using the reading encryption key kj, and
Through the storage of the prepaid card in the original block. In this way, the reading device 13 updates the price information stored in the prepaid card when using the prepaid card.

【００４２】なお、読書装置１３は、読書用暗号鍵ｋｊ
しか所持していないため、読書装置１３が使用できる金
額情報は、使用対象ブロックの金額情報のみに限定され
る。よって、読書装置１３は使用対象ブロック以外の他
のブロックに記憶されている金額情報を復号化し、使用
することができないため、使用対象ブロック以外のブロ
ックの金額情報が不正に使用されることを防止できる。It should be noted that the reading device 13 uses the reading encryption key kj.
Therefore, the amount information that can be used by the reading device 13 is limited to only the amount information of the use target block. Therefore, since the reading device 13 cannot decode and use the money amount information stored in the blocks other than the use target block, it is possible to prevent the use of the money amount information of the blocks other than the use target block from being illegally used. it can.

【００４３】なお、読書装置１３は閉店時等の所定のタ
イミングで、使用された金額情報等を通信制御部３７を
介して決済センタ１７へ送信する。決済センタ１７は、
読書装置１３から受信した金額情報等を記憶、管理す
る。The reading device 13 transmits the used amount information and the like to the settlement center 17 via the communication control unit 37 at a predetermined timing such as when the store is closed. The settlement center 17
It stores and manages money amount information and the like received from the reading device 13.

【００４４】利用者は、自己のプリペイドカードの使用
対象ブロックの金額情報が「０円」になるまで、そのカ
ードを使用する。そして、プリペイドカードの使用対象
ブロックの金額が「０円」になった場合、利用者等は、
その使用済みのプリペイドカードをリサイクル発券機１
５によって再発行（リサイクル）させる。このプリペイ
ドカードの再発行時におけるリサイクル発券機１５の動
作について、図６に示すような、読書用暗号鍵ｋｊと暗
号鍵ｋｅ１、ｋｅ２、・・・、ｋｅ９９で暗号化された
金額情報（Ｍ１、Ｍ２、・・・、Ｍ１００）を記憶する
プリペイドカードＣ１を処理する場合を例に図８を参照
して説明する。The user uses the prepaid card until the amount information of the block to be used on the card becomes "0 yen". If the amount of the block to be used for the prepaid card becomes “0 yen”, the user, etc.
Recycling of the used prepaid card 1
5 to reissue (recycle). Regarding the operation of the recycle ticketing machine 15 at the time of reissuing the prepaid card, as shown in FIG. 6, the amount information (M1, M2) encrypted with the reading encryption key kj and the encryption keys ke1, ke2,. M2,..., M100) will be described with reference to FIG.

【００４５】まず、利用者により、金額情報を使い切っ
たプリペイドカードがリサイクル発券機１５のカード読
書部４１に装着され、所定額（プリペイドカードの１回
分（１ブロック分）の金額）の現金が現金投入部４０に
投入される。First, the prepaid card, which has used up the amount information, is mounted on the card reading unit 41 of the recycle ticketing machine 15 by the user, and a predetermined amount (one time (one block amount) of the prepaid card) is cashed. It is thrown into the throwing section 40.

【００４６】これに応答して、リサイクル発券機１５の
制御部４５は、カード読書部４１に装着されたプリペイ
ドカードのリサイクル回数情報を参照し、使用対象の金
額情報が記憶されている使用対象ブロックを特定し、そ
の残金が「０円」であることを確認する（ステップＳ１
１）。In response, the control unit 45 of the recycling ticket issuing machine 15 refers to the information on the number of times of recycling of the prepaid card attached to the card reading unit 41, and uses the target block in which the amount information of the target is stored. And confirms that the balance is "0 yen" (step S1).
1).

【００４７】制御部４５は、残金が「０円」であること
を確認し、リサイクル回数情報をもとに次に使用するブ
ロックを特定し、その金額情報を適当な復号鍵を用いて
復号化する（ステップＳ１２）。例えば、プリペイドカ
ードＣ１に記憶されるリサイクル回数情報が「０回」の
場合、制御部４５は、図９（ａ）に示すように、２番目
のブロックＤ２を次に使用するブロックとみなし、復号
鍵ｋｄ１を用いる。また、リサイクル回数情報が「１
回」の場合、制御部４５は、３番目のブロックＤ３を次
に使用するブロックとし、復号鍵ｋｄ２を用いる（図９
（ｂ））。同様にして、リサイクル回数情報が「ｎ回」
の場合、制御部４５は、ブロックＤ（ｎ＋２）を次に使
用するブロックとし、復号鍵ｋｄ（ｎ＋１）を用いる
（図９（ｃ））。The control unit 45 confirms that the balance is "0 yen", specifies the block to be used next based on the number of recycling times, and decrypts the amount information using an appropriate decryption key. (Step S12). For example, when the number-of-times-of-recycling information stored in the prepaid card C1 is “0”, the control unit 45 regards the second block D2 as the next block to be used as shown in FIG. The key kd1 is used. Also, if the number of times of recycling is "1"
In the case of “time”, the control unit 45 sets the third block D3 as the next block to be used, and uses the decryption key kd2 (FIG. 9).
(B)). Similarly, the information on the number of times of recycling is "n times"
In this case, the control unit 45 sets the block D (n + 2) as the next block to be used, and uses the decryption key kd (n + 1) (FIG. 9C).

【００４８】次に、制御部４５は、復号化した金額情報
を読書用暗号鍵ｋｊを用いて暗号化し（ステップＳ１
３）、読み出し元のブロックに記録する（ステップＳ１
４）。また、制御部４５は、プリペイドカードのリサイ
クル回数情報を更新する（１カウントアップする）（ス
テップＳ１５）。Next, the control unit 45 encrypts the decrypted amount information using the reading encryption key kj (step S1).
3), recording in the read source block (step S1)
4). The control unit 45 updates the information on the number of times of recycling of the prepaid card (counts up by one) (step S15).

【００４９】このようにして、リサイクル発券機１５
は、使用済みとして装着されたプリペイドカードに記憶
されている複数回分の金額情報から、１回分の金額情報
を新たに復号化し、読書装置１３で使用できるように読
書暗号鍵ｋｊで暗号化する。これにより、使用済みのカ
ードを、読書装置１３において再び使用可能なカードと
して再発行（リサイクル）することができる。In this way, the recycling ticket issuing machine 15
Decrypts a single amount of money information from a plurality of times of money information stored in the prepaid card attached as used and encrypts it with the reading encryption key kj so that the reading device 13 can use it. Thus, the used card can be reissued (recycled) as a card that can be used again in the reading device 13.

【００５０】なお、ステップＳ１１において、使用対象
ブロックの残金が「０円」でなく、未使用の金額が残っ
ている場合、例えば、残金が有ることを示す残金ランプ
を点灯してカードを排出する等のエラー処理を行う（ス
テップＳ１６）。In step S11, when the balance of the block to be used is not "0 yen" and an unused amount remains, for example, a balance lamp indicating that there is a balance is turned on and the card is ejected. And the like (step S16).

【００５１】なお、リサイクル発券機１５は閉店時等の
所定のタイミングで、再発行処理の回数等の情報を通信
制御部４７を介して決済センタ１７へ送信する。決済セ
ンタ１７は、リサイクル発券機１５から受信した金額情
報等を記憶、管理する。The recycle ticketing machine 15 transmits information such as the number of reissues to the settlement center 17 via the communication control unit 47 at a predetermined timing such as when the store is closed. The settlement center 17 stores and manages money amount information and the like received from the recycling ticket issuing machine 15.

【００５２】なお、記録装置１１に記憶される「リサイ
クル回数」、「設定金額」等のプリペイドカードを発行
するための情報は、入力部２１から新たな値が入力する
ことにより、設定を変更できるようにしてもよい。The information for issuing the prepaid card such as the “recycle count” and the “set amount” stored in the recording device 11 can be changed by inputting a new value from the input unit 21. You may do so.

【００５３】また、読書装置１３が、プリペイドカード
の使用対象ブロックの金額情報が「０円」になったと
き、そのプリペイドカードに、金額情報を何回分使用し
たかを示すためのパンチ孔を開けるようにしてもよい。
また、リサイクル発券機１５が、プリペイドカードを再
発行するとき、そのプリペイドカードに、再発行の回数
を示すためのパンチ孔を開けるようにしてもよい。Further, when the amount information of the block to be used of the prepaid card becomes "0 yen", the reading device 13 makes a punch hole for indicating how many times the amount information has been used in the prepaid card. You may do so.
Further, when the recycle ticketing machine 15 reissues a prepaid card, a punch hole for indicating the number of reissues may be formed in the prepaid card.

【００５４】なお、読書用暗号鍵ｋｊと、暗号鍵ｋｅ
（ｋｅ１、ｋｅ２、・・・、ｋｅｎ）と、復号鍵ｋｄ
（ｋｄ１、ｋｄ２、・・・、ｋｄｎ）と、の各装置（記
録装置１１、読書装置１３、リサイクル発券機１５）へ
の配布方法は任意であり、例えば、通信により行っても
よい。The reading encryption key kj and the encryption key ke
(Ke1, ke2,..., Ken) and the decryption key kd
(Kd1, kd2,..., Kdn) can be distributed to any of the devices (the recording device 11, the reading device 13, and the recycle ticketing machine 15) by any method.

【００５５】また、上記説明では、プリペイドカードに
記憶される金額情報のうち、未使用分の金額情報を暗号
化／復号化するための鍵として、複数組の暗号鍵と復号
鍵を用いたが、１組の暗号鍵と復号鍵のみを用いるよう
にしてもよい。この場合、例えば、記録装置１１は、読
書用暗号鍵と一種類の暗号鍵とを有し、プリペイドカー
ドに記録する金額情報のうち、１回目の金額情報を読書
用暗号鍵で暗号化し、２回目以降の金額情報を一種類の
暗号鍵で全て暗号化する。また、リサイクル発券機１５
は、一種類の復号鍵を有し、カードの再発券時、プリペ
イドカードの暗号化された金額情報を一種類の復号鍵で
復号化する。In the above description, a plurality of sets of encryption keys and decryption keys are used as keys for encrypting / decrypting unused amount information among the amount information stored in the prepaid card. Alternatively, only one set of encryption key and decryption key may be used. In this case, for example, the recording device 11 has a reading encryption key and one kind of encryption key, and encrypts the first amount information among the amount information to be recorded on the prepaid card with the reading encryption key. All the money information after the first time is encrypted with one type of encryption key. In addition, recycling ticketing machine 15
Has one type of decryption key, and when the card is reissued, decrypts the encrypted amount information of the prepaid card with one type of decryption key.

【００５６】また、上記説明では、リサイクル回数情報
をリサイクル発券機１５が更新していたが、読書装置１
３が所定のタイミング（例えば、使用中金額情報を使い
切った後、等）で更新するようにしてもよい。In the above description, the recycling ticket issuing machine 15 updates the number of recycling times information.
3 may be updated at a predetermined timing (for example, after the used amount information is used up).

【００５７】[0057]

【発明の効果】以上説明したように、本発明によれば、
所定回数分の金額情報を暗号化してプリペイドカードに
記憶し、例えば、１回分の金額情報が全て使用される
と、新たな１回分の金額情報を復号化してそのカードを
再発券する。これにより、同一のプリペイドカードをリ
サイクル（再使用）することができる。また、プリペイ
ドカードに記憶される所定回数の金額情報のうち、１回
分の金額情報のみを復号化して使用可能な状態にするた
め、読書装置が使用できる金額情報を制限し、システム
の安全性を向上することができる。As described above, according to the present invention,
The predetermined amount of money information is encrypted and stored in the prepaid card. For example, when all the money information of one time is used, the new money information of one time is decrypted and the card is reissued. Thereby, the same prepaid card can be recycled (reused). In addition, in order to decrypt only one amount of money information out of the predetermined number of times of money information stored in the prepaid card and make it usable, the amount of money information that can be used by the reading device is limited, and the security of the system is reduced. Can be improved.

[Brief description of the drawings]

【図１】本発明の実施の形態に係るプリペイドカードシ
ステムの構成を示す図である。FIG. 1 is a diagram showing a configuration of a prepaid card system according to an embodiment of the present invention.

【図２】記録装置の構成を示す図である。FIG. 2 is a diagram illustrating a configuration of a recording apparatus.

【図３】読書装置の構成を示す図である。FIG. 3 is a diagram illustrating a configuration of a reading device.

【図４】リサイクル発券機の構成を示す図である。FIG. 4 is a diagram showing a configuration of a recycling ticket issuing machine.

【図５】カード発行処理における記録装置の動作を説明
するための図である。FIG. 5 is a diagram for explaining the operation of the recording device in the card issuing process.

【図６】記録装置によるプリペイドカードに記録する金
額情報の暗号処理を説明するための図である。FIG. 6 is a diagram for explaining an encryption process of money amount information recorded on a prepaid card by a recording device.

【図７】プリペイドカードの構造の一例を示す図であ
る。FIG. 7 is a diagram showing an example of the structure of a prepaid card.

【図８】プリペイドカードを再発券する際のリサイクル
発券機の動作を説明するための図である。FIG. 8 is a diagram for explaining the operation of the recycle ticketing machine when reissuing a prepaid card.

【図９】リサイクル発券機がプリペイドカードのリサイ
クル回数情報をもとに適当なブロックを復号化する処理
を説明するための図である。FIG. 9 is a diagram for explaining a process in which a recycle ticketing machine decodes an appropriate block based on information on the number of recycles of a prepaid card.

[Explanation of symbols]

１１記録装置１３読書装置１５リサイクル発券機１７決済センタ２１入力部２３カード記録部２７記憶部２９制御部３１カード読書部３３記憶部３５制御部３７通信制御部４０現金投入部４１カード読書部４３記憶部４５制御部４７通信制御部 REFERENCE SIGNS LIST 11 recording device 13 reading device 15 recycling ticketing machine 17 settlement center 21 input unit 23 card recording unit 27 storage unit 29 control unit 31 card reading unit 33 storage unit 35 control unit 37 communication control unit 40 cash input unit 41 card reading unit 43 storage Unit 45 control unit 47 communication control unit

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.⁷ 識別記号ＦＩＨ０４Ｌ 9/14 Ｇ０７Ｆ 7/08 ＭＨ０４Ｌ 9/00 ６４１ (56)参考文献特開平２−220898（ＪＰ，Ａ) 特開平７−220141（ＪＰ，Ａ) 特開平４−291487（ＪＰ，Ａ) 特開平６−295370（ＪＰ，Ａ) 特開平４−354093（ＪＰ，Ａ) (58)調査した分野(Int.Cl.⁷，ＤＢ名) G07F 7/08 G06K 17/00 G07B 1/00 G09C 1/00 H04L 9/14 ────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI H04L 9/14 G07F 7/08 MH04L 9/00 641 (56) References JP-A-2-220898 (JP, A) JP-A JP-A-7-220141 (JP, A) JP-A-4-291487 (JP, A) JP-A-6-295370 (JP, A) JP-A-4-3544093 (JP, A) (58) Fields investigated (Int .Cl. ⁷ , DB name) G07F 7/08 G06K 17/00 G07B 1/00 G09C 1/00 H04L 9/14

Claims

(57) [Claims]

1. A prepaid card system using a prepaid card storing money amount information having a monetary value, wherein an encryption key of a first encryption method and a plurality of encryption keys of a second encryption method are stored. Means, generating means for generating money amount information for a predetermined number of times, and of the money amount information generated by the generating means, encrypting the money amount information for the first time with the encryption key of the first encryption method, Encryption means for sequentially encrypting each amount information after the minute by using a corresponding encryption key among the plurality of encryption keys of the second encryption method; and storing the amount information encrypted by the encryption means in a prepaid card. Recording means comprising: means for recording; means for storing an encryption key of the first encryption method; and a first decryption key paired with the encryption key of the first encryption method; and a prepaid card. When using Identification means for identifying the amount information to be used among the amount information recorded on the repaid card, and the amount information identified by the identification means is decrypted with the first decryption key, and Updating means for updating the updated amount information with the encryption key of the first encryption method and storing the encrypted amount information in the prepaid card; an encryption key of the first encryption method; Means for storing a plurality of second decryption keys that are paired with a plurality of encryption keys of the second encryption method, and, in response to a request from the outside, out of the amount information recorded on the prepaid card, Specifying means for specifying money amount information to be used next; decoding means for decoding the money amount information specified by the specifying means using an appropriate decoding key among the plurality of second decoding keys; Amount decrypted by means Prepaid card system comprising: the recurrence tickets means for recording on the prepaid card by encrypting the broadcast encryption key of the first encryption method, and recurrent ticket device comprising, a.

2. The prepaid card according to claim 1, wherein said recording device further comprises means for externally setting at least one of the amount and the number of times for the amount information generated by said generating unit. system.

3. A reading apparatus and a reissue apparatus for processing a prepaid card storing a plurality of times of money information sequentially encrypted with a corresponding encryption key among a plurality of encryption keys at least for the second time and thereafter. A prepaid card system, wherein the reading device includes, when using the prepaid card, identification means for identifying, among a plurality of pieces of money information recorded on the prepaid card, money information to be used; and the identification means. Updating means for updating the identified amount information in accordance with the usage amount and storing the updated amount information in the prepaid card, wherein the reissue ticket device is configured to store a plurality of decryption keys and stored in the prepaid card. A specifying unit that specifies next amount information to be used among the plurality of amount information, and the amount information specified by the specifying unit is used for the plurality of decryption keys. Decoding means for decoding using the appropriate decryption key Chi,
A reissue ticket means for recording the amount information decrypted by the decryption means on the prepaid card.

4. The reading device stores a reading encryption key and a reading decryption key paired with the reading encryption key. The reissue ticket device stores the reading encryption key, The updating means of the reading device, when using a prepaid card in which the first-time amount information is previously encrypted with the reading encryption key, converts the amount information identified by the identification means into the reading decryption key. Means for encrypting the updated amount information with the encryption key for reading and storing the updated amount information in the prepaid card, wherein the reissue means of the reissue apparatus is decrypted by the decryption means. 4. The prepaid card system according to claim 3, further comprising means for encrypting the amount information with the reading encryption key and recording the information on the prepaid card.

5. The re-ticketing apparatus further comprises a means for specifying the amount information to be used next after confirming that there is no balance in the amount information recently used in the prepaid card. The prepaid card system according to any one of claims 1 to 4, wherein

6. The re-issue ticket device according to claim 1, wherein said specifying means of said reissue ticket device includes means for specifying information on the amount of money to be used next in response to the insertion of cash equivalent to a predetermined amount of money. A prepaid card system according to any one of the preceding claims.

7. The at least one of the reading device and the reissue ticket device further includes means for recording, on the prepaid card, usage count information indicating the number of times the prepaid card is reused, wherein the identification means of the reading device is Further comprising means for referring to the information on the number of times of use stored in the prepaid card and identifying the information on the amount of money to be used among the information on the amount of money recorded on the prepaid card; Further comprising means for referring to the number-of-uses information stored in the prepaid card and specifying next amount information to be used among the amount information stored in the prepaid card. Item 7. The prepaid card system according to any one of items 1 to 6.

8. A prepaid card system using a prepaid card for storing money amount information having a monetary value, comprising: means for storing an encryption key of a first encryption method and an encryption key of a second encryption method; Generating means for generating the amount information of the minute, of the amount information generated by the generating means,
Encrypting means for encrypting the first amount information with the encryption key of the first encryption method, encrypting the second amount information with the encryption key of the second encryption method, and encryption by the encryption means; Recording means for recording the converted amount information on a prepaid card; an encryption key of the first encryption method; and a first decryption key paired with the encryption key of the first encryption method. Means for storing, when using the prepaid card, identification means for identifying the amount information to be used among the amount information recorded on the prepaid card, and the amount information identified by the identification means Decryption means for decrypting with the encryption key of the first encryption method, updating means for updating the amount information decrypted by the decryption means in accordance with the usage amount, and updating the updated amount information of the first encryption method. Encrypted with an encryption key, A reading device comprising means for recording on a prepaid card; means for storing an encryption key of the first encryption method and a second decryption key paired with the encryption key of the second encryption method. ,
In response to the cash input corresponding to the predetermined amount, a specifying unit for specifying the next amount information to be used among the amount information recorded on the prepaid card, and the amount information specified by the specifying unit to the second unit. A re-issue ticket comprising: a money amount decrypting means for decrypting with the decryption key of the above; and a means for encrypting the money amount information decrypted by the money amount decrypting means with the encryption key of the first encryption method and recording the same on the prepaid card. A prepaid card system comprising: an apparatus;

9. A recording device for issuing a prepaid card for storing money amount information having a monetary value, wherein the recording device stores an encryption key of a first encryption system and an encryption key of a second encryption system. Means for generating money information for a predetermined number of times, and among the money information generated by the generation means, encrypts the money information for the first time with the encryption key of the first encryption method. An encryption unit for encrypting the amount information after the first time with the encryption key of the second encryption method, and a unit for recording the amount information encrypted by the encryption unit on a prepaid card. Recording device.

10. A prepaid card for storing money amount information having a monetary value, wherein the prepaid card is encrypted for the first time with an encryption key of a first encryption method, and for the second and subsequent times. A prepaid card for storing a predetermined number of times of money information sequentially encrypted with a corresponding one of a plurality of encryption keys of a second encryption system.

11. The first time is encrypted with an encryption key of a first encryption method, and the second and subsequent times are sequentially encrypted with a corresponding one of a plurality of encryption keys of a second encryption method. A card reissue ticket device for processing a prepaid card storing a predetermined number of times of money information, the card reissue ticket device comprising: an encryption key of the first encryption method; Means for storing a plurality of decryption keys that are paired with the encryption key, specifying means for specifying the amount information to be used next among a plurality of pieces of money information stored in the prepaid card, and specifying by the specifying means Decryption means for decrypting the obtained amount information with an appropriate decryption key of the plurality of decryption keys, and reissue ticket means for recording the amount information decrypted by the decryption means on the prepaid card, Mosquito characterized by De recurrence ticket equipment.

12. The card reissue ticket device further comprises means for identifying the amount of money to be used next and decrypting it after confirming that there is no balance remaining in the amount of money recently used in the prepaid card. The card reissue device according to claim 11, characterized in that:

13. The card reissue card device further stores a reading encryption key used in a reading device for consuming the amount information of the prepaid card, wherein the reissue ticket means is decrypted by the decryption means. 13. The card reissue ticket device according to claim 11, further comprising means for encrypting the set amount information with the reading encryption key and recording the encrypted amount information on the prepaid card.

14. A prepaid card reissuing method for reissuing a used prepaid card in a system using a prepaid card storing amount information, comprising: a generating step of generating a predetermined number of amount information; Out of the predetermined amount of money information generated in the generation step, the first time money information is encrypted with the first encryption key, and the second and subsequent money information is replaced with the plurality of second encryption keys. An encryption step of sequentially encrypting using a corresponding one; a recording step of recording the amount information encrypted by the encryption step on a prepaid card; and a prepaid card on which a predetermined number of amount information is recorded by the recording step Identifying an amount of money to be used among the amount of money information recorded on the prepaid card according to the use of The amount information identified in the identification step is stored in the first
An update step of decrypting with a first decryption key that is paired with the encryption key and updating the amount information according to the usage amount;
A recording step of encrypting with the encryption key of the prepaid card and recording the data on the prepaid card; and in response to an external request, a confirmation step of confirming that there is no balance of recently used amount information in the prepaid card. According to the present invention, when it is confirmed that there is no balance of recently used amount information in the prepaid card, a specifying step of specifying next amount information to be used among the amount information stored in the prepaid card; and The amount information specified by the step
A decryption step of decrypting with the second decryption key paired with the encryption key of the above, and a reissue ticket step of encrypting the amount information decrypted by the decryption step with the first encryption key and recording the information on the prepaid card A prepaid card reissue ticket method, comprising:

15. A prepaid card system using a prepaid card storing money amount information having a monetary value, comprising: means for storing a first encryption key and a plurality of second encryption keys; Generating means for generating the amount information of the first time, and among the amount information generated by the generating means, the first amount information is encrypted with the first encryption key, A recording device comprising: an encryption unit for sequentially encrypting using a corresponding one of the second encryption keys, and a unit for recording the amount information encrypted by the encryption unit on a prepaid card; Means for storing a first encryption key and a first decryption key that is paired with the first encryption key; and, when the prepaid card is used, of the money amount information recorded on the prepaid card, Target Identification means for identifying the amount information, and the amount information identified by the identification means is decrypted with the first decryption key, updated according to the usage amount, and the updated amount information is updated with the first encryption key. A reading device comprising: updating means for encrypting and storing in the prepaid card; storing the first encryption key; and a plurality of second decryption keys paired with the plurality of second encryption keys. Means for specifying, in response to a request from the outside, of the money information recorded on the prepaid card, money information to be used next, and the plurality of money information specified by the specifying means. Decrypting means using an appropriate decryption key among the second decryption keys, and encrypting the amount information decrypted by the decrypting means with the first encryption key and recording the information on the prepaid card. Reissue ticket means And equipment,
The prepaid card system further comprising: means for externally setting at least one of the amount and the number of the amount information generated by the generating unit.

16. A prepaid card system using a prepaid card for storing money amount information having a monetary value, comprising: means for storing a first encryption key and a plurality of second encryption keys; Generating means for generating the amount information of the first time, and among the amount information generated by the generating means, the first amount information is encrypted with the first encryption key, A recording device comprising: an encryption unit for sequentially encrypting using a corresponding one of the second encryption keys, and a unit for recording the amount information encrypted by the encryption unit on a prepaid card; Means for storing a first encryption key and a first decryption key that is paired with the first encryption key; and, when the prepaid card is used, of the money amount information recorded on the prepaid card, Target Identification means for identifying the amount information, and the amount information identified by the identification means is decrypted with the first decryption key, updated according to the usage amount, and the updated amount information is updated with the first encryption key. A reading device comprising: updating means for encrypting and storing in the prepaid card; storing the first encryption key; and a plurality of second decryption keys paired with the plurality of second encryption keys. Means for specifying, in response to a request from the outside, of the money information recorded on the prepaid card, money information to be used next, and the plurality of money information specified by the specifying means. Decrypting means using an appropriate decryption key among the second decryption keys, and encrypting the amount information decrypted by the decrypting means with the first encryption key and recording the information on the prepaid card. Reissue ticket means Comprising apparatus and, wherein the identifying means of the recurrence ticket device, prepaid card system according to the insertion of a predetermined amount in cash, then comprises means for identifying the amount information used, characterized in that.

17. A prepaid card system using a prepaid card for storing money amount information having a monetary value, comprising: means for storing a first encryption key and a plurality of second encryption keys; Generating means for generating the amount information of the first time, and among the amount information generated by the generating means, the first amount information is encrypted with the first encryption key, A recording device comprising: an encryption unit for sequentially encrypting using a corresponding one of the second encryption keys, and a unit for recording the amount information encrypted by the encryption unit on a prepaid card; Means for storing a first encryption key and a first decryption key that is paired with the first encryption key; and, when the prepaid card is used, of the money amount information recorded on the prepaid card, Target Identification means for identifying the amount information, and the amount information identified by the identification means is decrypted with the first decryption key, updated according to the usage amount, and the updated amount information is updated with the first encryption key. A reading device comprising: updating means for encrypting and storing in the prepaid card; storing the first encryption key; and a plurality of second decryption keys paired with the plurality of second encryption keys. Means for specifying, in response to a request from the outside, of the money information recorded on the prepaid card, money information to be used next, and the plurality of money information specified by the specifying means. Decrypting means using an appropriate decryption key among the second decryption keys, and encrypting the amount information decrypted by the decrypting means with the first encryption key and recording the information on the prepaid card. Reissue ticket means And at least one of the reading device and the reissue ticket device, further comprising: means for recording, on the prepaid card, usage count information indicating the number of reuses of the prepaid card; and the identification means of the reading device. Further comprising: means for referring to the number-of-uses information stored in the prepaid card, and identifying money information to be used among the money information recorded on the prepaid card, wherein the identification of the reissue ticket device The means further comprises means for referring to the number-of-uses information stored in the prepaid card and identifying the next amount information to be used among the amount information stored in the prepaid card. Prepaid card system.

18. A recording device for issuing a prepaid card storing money amount information having a monetary value, said recording device comprising: means for storing a first encryption key and a second encryption key; Generating means for generating the price information, encrypting the first amount information of the amount information generated by the generating means with the first encryption key, and encrypting the second amount information with the second encryption key A recording apparatus, comprising: an encryption unit for encrypting the information; and a unit for recording the amount information encrypted by the encryption unit on a prepaid card.

19. A prepaid card for storing money amount information having a monetary value, wherein the prepaid card is encrypted a first time with a first encryption key and a second time is encrypted with a second encryption key. A prepaid card, which stores money amount information encrypted with a key.

20. A card reissue ticket for processing a prepaid card storing money amount information which is encrypted with a first encryption key for the first time and encrypted with a second encryption key for the second time and on. The card reissuing device includes means for storing a decryption key that is paired with the second encryption key, and decrypts second-time amount information stored in a prepaid card with the decryption key. And a reissue ticket means for recording the amount information decrypted by the decryption means on the prepaid card.

21. Store money amount information having a monetary value.
A prepaid card, The first time is encrypted with the encryption key of the first encryption method.
The second and subsequent times are encrypted with the encryption key of the second encryption method.
Storing predetermined amount of money information A prepaid card characterized in that:

22. Storing a plurality of pieces of information having a monetary value
Card The first time is encrypted with the encryption key of the first encryption method.
The second and subsequent times are encrypted with the encryption key of the second encryption method.
Storing predetermined amount of money information A card characterized in that:

23. Storing a plurality of information having a monetary value
Card The first time is encrypted with the first encryption key, and the second time
Has a monetary value encrypted with a second encryption key
Memorize information, A card characterized in that: