JP6495346B2 - Information processing system - Google Patents

Description

  The present invention relates to an information processing system.

  In recent years, a mechanism called block chain or block chain technology is becoming popular mainly in virtual currency. Blockchain appeared in 2008 as the core technology of virtual currency bitcoin. Blockchain is a technology that enables information synchronization between distributed nodes under a condition that malicious nodes are within a certain ratio in a network composed of distributed nodes. Information held by a distributed node is called ledger data or ledger, and has a logical structure that connects data blocks.

  The data block stores information related to transactions issued to the block chain network. A node participating in the maintenance of the blockchain network verifies each transaction issued to the blockchain network, and collects a plurality of transactions to start generating a data block. There are certain conditions for generating data blocks, and nodes participating in the maintenance of the block chain search for data blocks that satisfy the conditions. A node that has been able to generate a data block that satisfies the condition transmits the data block found to other nodes and adds the block to its own ledger data. The node that has received the data block verifies the transaction and data block stored in the data block, and connects to the ledger data held by the node.

  The data block includes information on the transaction to be stored, information indicating the immediately preceding data block, and information on the block generation condition, and anyone can verify and confirm the correctness of the information. Since there is a dependency relationship between data blocks and there are conditions for block generation, there is a feature that the past data blocks become more difficult to falsify. The ledger data stores all transactions issued to the blockchain network.

  Several blockchain implementations are known. The first implemented blockchain is a virtual currency bit coin (see Non-Patent Document 1). In Bitcoin, transactions are expressed as a series of transactions. In recent years, blockchain implementations have also appeared that can embed program code in ledger data, execute arbitrary processing by transactions, and store the results in the ledger data (see Non-Patent Document 2). In the platform that can execute the program code, in addition to the transaction, information about the program code and the processing result is also held in the ledger data and is synchronized between the distributed nodes.

Satoshi Nakamoto, [online], “Bitcoin: A Peer-to-Peer Electronic Cash System”, [Search December 8, 2016], Internet <URL: http://www.cryptovest.co.uk/resources/ Bitcoin% 20paper% 20Original.pdf> “ETHEREUM: A SECURE DECENTRALISED GENERALISED TRANSACTION LEDGER”, [online], [Search December 8, 2016], Internet <URL: http: //bitcoinaffiliatelist.com/wp-content/uploads/ethereum.pdf>

  However, in the blockchain, all transaction information is stored in the blockchain. Therefore, there is a risk that the information will be read for a long time even for the purpose of exchanging and maintaining temporary information that does not need to be stored permanently. The risk of outflow increases by the number of distributed nodes). Further, since all transactions are stored in the ledger data, the ledger data becomes enormous if information other than information that is permanently required is stored.

  In order to retain temporary information, a new temporary information data storage area is created separately from the ledger data, temporary information is stored in the data storage area, and temporary information is excluded from transactions when storing transactions in blocks. If you take this, there are the following issues.

  In order to be able to remove the temporary information, it is necessary to sign the transaction excluding that part, but there is a possibility that the field describing the temporary information may be replaced by a third party. Even if a new electronic signature is given only to temporary information in addition to the signature on the transaction, it may be replaced with temporary information of another transaction of the same issuer.

  Accordingly, an object of the present invention made in view of such a point is to be able to store temporary information and to reduce the ledger data or the ledger data and the data storage area for the ledger data. .

  In order to solve the above-described problem, an information processing system according to the present invention is an information processing system including one or more transaction issuing devices that transmit / receive information to / from each other and a plurality of block generation verification devices. An apparatus includes a transaction generation unit that generates transaction information including the transaction information and temporary information (in the embodiment, means first transaction information or second transaction information), and the block generation verification apparatus that transmits the transaction information. A block generation unit that generates a storage block that includes the transaction information and a digest value of the transaction information, and does not include the temporary information. , Said temporary Information is stored in the temporary information data storage area and the storage block is connected to the ledger data, the temporary information, the transaction information, the digest value of the transaction information, and the temporary information data storage A block communication unit that transmits the digest value of the area; a digest value calculated from the temporary information data storage area that stores the temporary information transmitted from another block generation verification device; and a digest of the temporary information data storage area And a block verification unit that verifies the temporary information based on the value.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to store temporary information, the block chain and the data storage area for ledger data can be reduced in weight.

It is a functional lineblock diagram of the information processing system concerning a 1st embodiment. It is a function block diagram of the transaction issuing apparatus shown in FIG. It is a conceptual diagram which shows the 1st transaction information with a digital signature in 1st Embodiment. It is a functional block diagram of the block production | generation verification apparatus shown in FIG. FIG. 5A is a conceptual diagram showing blocks in the first embodiment, FIG. 5A is a conceptual diagram showing storage blocks, and FIG. 5B is a conceptual diagram showing transmission / reception blocks. It is a conceptual diagram which shows the block chain in 1st Embodiment. It is a processing flowchart which shows the information processing method of the block generation verification apparatus in 1st Embodiment. It is a processing flowchart which shows the information processing method of the other block production | generation verification apparatus in 1st Embodiment. It is a conceptual diagram which shows the 2nd transaction information with an electronic signature in 2nd Embodiment. It is a functional block diagram of the block generation verification apparatus in 2nd Embodiment. It is a conceptual diagram which shows the block for storage in 2nd Embodiment. It is a conceptual diagram which shows the block chain in 2nd Embodiment. It is a processing flowchart which shows the information processing method of the block generation verification apparatus in 1st Embodiment. It is a processing flowchart which shows the information processing method of the other block production | generation verification apparatus in 1st Embodiment. It is an example of the program code contained in transaction information.

[First Embodiment]
First, the functional configuration of the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a functional configuration diagram of an information processing system 1 according to the first embodiment.

  As shown in FIG. 1, the information processing system 1 includes one or more transaction issuing devices 2 and a plurality of block generation verification devices 3. The plurality of transaction issuing devices 2 and the plurality of block generation verification devices 3 are connected to each other by a P2P (Peer to Peer) type communication network (hereinafter referred to as “block chain network”), and transmit and receive information.

  The transaction issuing device 2 is a computer such as a smartphone, a PC (Personal Computer), or a tablet. As illustrated in FIG. 2, the transaction issuing device 2 includes a transaction generation unit 21, an electronic signature assignment unit 22, and a transaction communication unit 23.

  The transaction generation unit 21 generates first transaction information as shown in FIG. 3 based on a user input. The first transaction information includes the transaction information and temporary information. An example of the transaction information is information on a transaction using a virtual currency (bit coin) used in the information processing system 1. Further, the transaction information may be a program code for performing a calculation process or a result of the calculation process. As an example, the transaction information is information indicating that the user U1 has transferred money to the user U2, and includes an amount, identification information of the user U1, identification information of the user U2, and the like. Temporary information is information that does not need to be permanently stored in a block as a transaction history, such as encrypted information, a content decryption key for decrypting the encrypted information, and the like. As described above, when the encrypted information, the content decryption key, etc. are included in the temporary information, for example, the operation or information processing system that deletes the request from the user of the encrypted personal information or the use of the service is terminated. It is possible to delete the content decryption key when the transmission / reception of the content decryption key is completed between the users participating in 1.

  The electronic signature attaching unit 22 assigns a first electronic signature by encrypting the first transaction information generated by the transaction generating unit 21 including the transaction information and the temporary information using a secret key. In addition, the electronic signature giving unit 22 gives the second electronic signature with the same secret key as the first electronic signature only to the transaction information.

  The transaction communication unit 23 broadcasts the first transaction information generated by the transaction generation unit 21, the first electronic signature and the second electronic signature added by the electronic signature addition unit 22, and generates a plurality of block generation verification devices 3 to send.

  As shown in FIG. 4, the block generation verification device 3 includes a block communication unit 31, a storage unit 32, a transaction verification unit 33, a block generation unit 34, a block verification unit 35, and a storage control unit 36.

  The block communication unit 31 receives the first transaction information, the first electronic signature, and the second electronic signature transmitted from the transaction issuing device 2 or another block generation verification device 3. The block communication unit 31 broadcasts the first transaction information, the first electronic signature, and the second electronic signature received from the other block generation verification device 3 to another block generation verification device 3 by broadcast. To do.

  The storage unit 32 stores various information and a storage block in which the various information is collected. The storage unit 32 includes a ledger data storage area 321, a ledger data storage area 322, and a temporary information data storage area 323.

  The ledger data storage area 321 stores ledger data. As shown in FIG. 5A, the ledger data is a hash value of the block header of the previous block, a digest value of a plurality of transaction information stored in the ledger data storage area 322, and a temporary information data storage area. This is a chain-like set of information in which a storage block including a digest value of 323 and a plurality of pieces of transaction information is chained to the previous block as shown in FIG. The digest value in the temporary information data storage area 323 is the digest value of the entire temporary information stored in the temporary information data storage area 323.

  Here, “to chain” means to include the hash value of the block header of the previous block in each block. For this reason, for example, if any of the blocks chained together in the block chain is altered, the hash value of the block header of the block becomes a completely different value. For this reason, the hash value of the block header is different from the hash value described in the block header of the next block. Therefore, it becomes clear that the transaction information has been tampered with and is used as a mechanism for preventing tampering.

  The ledger data storage area 322 stores the main transaction information with an electronic signature included in the first transaction information.

  The temporary information data storage area 323 stores temporary information corresponding to the transaction information included in each block connected to the ledger data.

  The transaction verification unit 33 verifies the format and electronic signature of the first transaction information received by the block communication unit 31 from the transaction issuing device 2. Specifically, the transaction verification unit 33 determines whether or not the format of the first transaction information is a predetermined format. Further, the transaction verification unit 33 determines whether or not the first transaction information is from a valid issuer by signature verification of the electronic signature. Further, when the block communication unit 31 receives the first transaction information with the electronic signature from the other block generation verification device 3, the transaction verification unit 33 similarly verifies the format of the received first transaction information and the electronic signature. To do.

  When the transaction verification unit 33 determines that the transaction information format is a predetermined format and the transaction information is from a valid issuer, the block generation unit 34, as shown in FIG. A storage block including a block body and a block header is generated. The block generation unit 34 includes a plurality of main transaction information with an electronic signature in the block body of the storage block, and does not include temporary information. Note that one or more of the plurality of main transaction information included in the block main body may not include temporary information in the corresponding first transaction information.

  In addition, the block generation unit 34 includes, in the block header, a hash value of the block header of the previously stored block, a digest value of a plurality of transaction information included in the block body, and a digest value of the temporary information data storage area 323. And include. The block generation unit 34 stores the transaction information in the ledger data storage area 321 in a tree structure, but the root node in this tree structure may be included in the block header as a digest value.

  At this time, the block generator 34 searches for a nonce for the storage block to satisfy the block generation condition. The block generation condition is, for example, a condition that the hash value of the block header of the storage block is smaller than a threshold value.

  When the block generation unit 34 finds a nonce that satisfies a predetermined condition, it connects the storage block to the ledger data. Further, when the block generation unit 34 finds a nonce that satisfies the predetermined condition, the block generation unit 34 causes the block communication unit 31 to transmit the transmission / reception block to other block generation verification devices 3 by broadcast. Further, when the block generation unit 34 finds a nonce, the block communication unit 31 may transmit the transmission / reception block, and may further receive the transmitted transmission / reception block itself. In this case, the storage control unit 36 connects the storage block corresponding to the received transmission / reception block to the ledger data. The transmission / reception block is information obtained by adding temporary information to the storage block, as shown in FIG. That is, the transmission / reception block is stored in the block main body having the first transaction information, the first electronic signature, and the second electronic signature, the hash value of the block header of the previous block, and the ledger data storage area 322. And a block header having a digest value of a plurality of transaction information and a digest value of the temporary information data storage area 323.

  In the block verification unit 35, the block communication unit 31 receives a transmission / reception block from another block generation verification device 3, and the transaction verification unit 33 verifies the validity of the first transaction information included in the transmission / reception block.

  Specifically, the block verification unit 35 calculates a digest value from the transaction information included in the transmission / reception block, and calculates the digest value and the digest value in the ledger data storage area 322 described in the block header. Confirm the correctness if they are the same. The block verification unit 35 calculates a digest value from the temporary information data storage area 323, and the calculated digest value and the digest value of the temporary information data storage area 323 described in the block header are the same. Check the legitimacy.

  When the validity is confirmed, the block verification unit 35 verifies whether the storage block including the transaction information and not including the temporary information satisfies the block generation condition.

  The storage control unit 36 stores the transaction ID (Identification) for uniquely identifying the first transaction information and the temporary information included in the first transaction information in the temporary information data storage area 323.

  In addition, when the block generation unit 34 finds a nonce that satisfies a predetermined condition, the storage control unit 36 connects the storage block to the ledger data storage area 321 as shown in FIG. Further, when it is determined that the storage block corresponding to the transmission / reception block received by the block communication unit 31 satisfies the block generation condition, the storage control unit 36 connects the storage block to the ledger data.

  The storage control unit 36 deletes the temporary information stored in the temporary information data storage area 323 at a predetermined timing. For example, the storage control unit 36 can receive transaction information including an instruction to delete temporary information together with a transaction ID, and delete temporary information related to the transaction. Further, the storage control unit 36 may delete the temporary information when a predetermined time has elapsed since the temporary information was stored in the temporary information data storage area 323, or the predetermined period from the occurrence date and time of the transaction. Temporary information may be deleted when it has passed or when the contract period managed by another information management device has passed. The timing of deletion is designed as appropriate.

  Next, an information processing method of the block generation verification apparatus 3 in the first embodiment will be described with reference to the sequence diagram shown in FIG.

  The block communication unit 31 of the block generation verification device 3 receives the first transaction information broadcast from the transaction issuing device 2 (step S11).

  When the first transaction information is received in step S11, the transaction verification unit 33 verifies the format and electronic signature of the first transaction information and determines whether the transaction is a valid issuer (step S11). S12).

  If it is determined in step S12 that the first transaction information is a transaction by a valid issuer, the storage control unit 36 stores the temporary information in the temporary information data storage area 323 together with key information such as a transaction ID. (Step S13).

  When the temporary information is stored in step S13, the block generator 34 generates a storage block (step S14). Specifically, the block generation unit 34 includes a plurality of main transactions with electronic signatures in the block body, a digest value of the plurality of main transactions in the block header, a hash value of the block header of the previous block, and temporary information The digest value of the data storage area 323 is described. At this time, the block generation unit 34 searches for a nonce that the storage block satisfies the block generation condition.

  If a nonce is found in step S14, the storage control unit 36 connects the storage block to the ledger data. In addition, the block communication unit 31 generates another block for transmission / reception including the first transaction information included in the storage block generated by the block generation unit 34 and the hash value and digest value included in the block header. Broadcast to the verification device 3 (step S15). At this time, the transmission / reception block transmitted by the block communication unit 31 may be received by itself, and the storage control unit 36 may connect the storage block corresponding to the received transmission / reception block to the ledger data.

  Next, an information processing method of another block generation verification apparatus 3 that receives a transmission / reception block will be described with reference to FIG.

  The block communication unit 31 of the other block generation verification device 3 receives the transmission / reception block transmitted by broadcast (step S21).

  When the transmission / reception block is received in step S21, the transaction verification unit 33 verifies the format and electronic signature of the first transaction included in the transmission / reception block (step S22).

  When it is confirmed in step S22 that the first transaction information is a transaction by a valid issuer, the storage control unit 36 stores the temporary information included in the transmission / reception block in the temporary information data storage area 323 ( Step S23).

  When the temporary information is stored in step S23, the block verification unit 35 calculates the digest value from the temporary information data storage area 323, and the temporary information data storage area 323 described in the calculated digest value and the block header. If the digest value is the same, the validity is confirmed (step S24).

  When the validity of the temporary information data storage area 323 is confirmed in step S24, the block verification unit 35 verifies whether the storage block satisfies the block generation condition (step S25).

  When it is confirmed in step S25 that the storage block satisfies the block generation condition, the storage control unit 36 connects the storage block to the ledger data (step S26).

  As described above, according to the first embodiment, the block generation verification device 3 stores temporary information that does not need to be stored permanently among information included in the first transaction information. The temporary information stored in the H.323 and stored in the temporary information data storage area 323 is appropriately deleted. As a result, since it is not necessary to store temporary information in the ledger data storage area 321 and the ledger data storage area 322, the capacity of these areas can be reduced.

  At this time, in order to secure the authenticity of the transaction information stored permanently, it is necessary to give an electronic signature to the transaction information. Further, in order to ensure the authenticity of the temporary information, it is conceivable to digitally sign the temporary information as well, but in this case, there is a possibility that the field describing the temporary information may be replaced by a third party. However, according to the first embodiment, not only the electronic signature is attached to the transaction information, but also the temporary information and the first transaction information including the transaction information are attached with the electronic signature. This can be detected when tampering occurs or only temporary information included in the first transaction information is replaced. Therefore, the information processing system 1 can ensure the authenticity of the temporary information.

  Further, according to the first embodiment, the block generation verification apparatus 3 stores the storage block including only the transaction information not including the temporary information in the ledger data storage area 321, but the other block generation verification apparatus 3 Transmits a transmission / reception block including temporary information. Therefore, the other block generation verification device 3 can receive the first transaction information including both the temporary information and the present transaction information, and can accurately verify the received first transaction information. The other block generation verification device 3 can confirm that the temporary information corresponds to the transaction information that truly corresponds. In addition, the block generation verification device 3 verifies the entire temporary information corresponding to the transaction information connected to the ledger data using the digest value of the temporary information data storage area 323, so that the temporary information data storage area This can be clarified even if any of the temporary information stored in the H.323 is replaced. Thereby, the authenticity of the entire temporary information can be ensured.

  Further, according to the first embodiment, the block generation verification device 3 includes the digest value of the ledger data storage area 322 in the block header and transmits the block header to the other block generation verification device 3. For this reason, the other block generation verification device 3 calculates the digest value from the plurality of main transaction information included in the block body, and based on the calculated digest value and the digest value included in the block header, It can be determined whether or not any of the transaction information has been replaced. Specifically, when the calculated digest value and the digest value included in the block header are the same, the block generation verification device 3 determines that none of the transaction information has been replaced, and calculates the calculated digest. When the value and the digest value included in the block header are different, it can be determined that any one or more of the transaction information has been replaced. Therefore, it is possible to ensure the authenticity of a plurality of the transaction information included in the block transmitted from the block generation verification device 3 to the other block generation verification device 3.

  Accordingly, the storage capacity is reduced after temporarily storing temporary information that does not need to be stored permanently in the storage unit 32 without impairing the recordability and tamper resistance of all the transaction information realized by the blockchain. be able to.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to the drawings.

  Similar to the information processing system 1 according to the first embodiment, the information processing system 5 according to the second embodiment includes one or more transaction issuing devices 2 and a plurality of block generation verification devices 6. The plurality of transaction issuing devices 2 and the plurality of block generation verification devices 6 are connected to each other via a P2P (Peer to Peer) type communication network, and transmit and receive information. Note that the same constituent blocks as those of the information processing system 1 in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  In the second embodiment, the transaction generation unit 21 generates the transaction information and the temporary information as shown in FIG. 9 based on the input by the user. Moreover, the transaction generation part 21 calculates the digest value of temporary information based on temporary information.

  The electronic signature adding unit 22 generates encrypted transaction information by adding an electronic signature to the information generated by the transaction generating unit 21 and including the transaction information and the digest value of the temporary information.

  The transaction communication unit 23 transmits the second transaction information including the encrypted transaction information generated by the electronic signature adding unit 22 and the temporary information to the block generation verification device 6.

  As illustrated in FIG. 10, the block generation verification device 6 includes a cache table 37 in addition to the functional units of the block generation verification device 3 of the first embodiment. The cache table 37 stores temporary information included in the second transaction information.

  The transaction verification unit 33 verifies the format and electronic signature of the second transaction information received by the block communication unit 31 from the transaction issuing device 2.

  The block generation unit 34 generates a storage block including a block body and a block header as shown in FIG. The block generation unit 34 includes a plurality of encrypted transaction information with an electronic signature in the block body. Further, as shown in FIG. 12, the block generation unit 34 includes the digest value of the cache table 37 in the block header in addition to the hash value of the block header of the previous block and the hash values of the plurality of transaction information.

  The block verification unit 35 calculates the digest value from the cache table 37 storing temporary information received from the other block generation verification device 6. Then, the block verification unit 35 verifies whether or not the calculated digest value matches the digest value of the cache table 37 described in the block header of the transmission / reception block.

  Further, the block verification unit 35 calculates a digest value from the temporary information data storage area 323. Then, the block verification unit 35 verifies whether the calculated digest value matches the digest value of the temporary information data storage area 323 described in the block header of the transmission / reception block.

  Next, the block verification unit 35 matches the digest value of the cache table 37 storing the temporary information with the digest value of the cache table described in the block header, and the digest value of the temporary information data storage area 323 is When the digest value of the temporary information data storage area described in the block header matches the digest value of the temporary information stored in the cache table 37, the temporary information described in the encrypted transaction information corresponding to the temporary information It is verified whether or not it matches the digest value.

  The storage control unit 36 determines that the digest value of the temporary information stored in the cache table 37 matches the digest value of the temporary information described in the encrypted transaction information corresponding to the temporary information, and the storage block is If it is determined that the block generation condition is satisfied, the storage block is connected to the ledger data.

  Further, when the block generation unit 34 finds a nonce that satisfies the block generation condition, the block communication unit 31 broadcasts the storage block and the temporary information stored in the cache table 37 to other block generation verification devices 6. Send with.

  Next, an information processing method of the information processing system 5 in the second embodiment will be described with reference to FIG.

  Steps S31 to S33 and S35 are the same as steps S11 to S13 and S15 in the first embodiment, respectively.

  When the temporary information is stored in step S33, the block generator 34 generates a storage block. Specifically, the block generation unit 34 includes a plurality of electronic signature-added main transactions in the block body, a plurality of main transaction digest values in the block header, a block header hash value of the previous block, and temporary information. In addition to the digest value in the data storage area 323, the digest value in the cache table 37 is described (step S34).

  Next, an information processing method of another block generation verification apparatus 6 that receives a transmission / reception block will be described with reference to FIG.

  Steps S41 and S42 are the same as steps S11 and S12 in the first embodiment, respectively.

  When the second transaction information is verified in step S42, the block verification unit 35 calculates a digest value from the cache table 37. The block verification unit 35 confirms the validity when the calculated digest value is the same as the digest value of the cache table 37 described in the block header of the transmission / reception block. (Step S43).

  If it is determined in step S43 that the digest values in the cache table 37 match, the storage control unit 36 stores temporary information in the temporary information data storage area 323 (step S44).

  When the temporary information is stored in step S44, the block verification unit 35 calculates a digest value from the temporary information data storage area 323. Then, the block verification unit 35 verifies whether or not the calculated digest value matches the digest value in the temporary information data storage area 323 described in the block header of the transmission / reception block, and stores it in the cache table 37. It is verified whether the digest value of the received temporary information matches the digest value described in the transaction information corresponding to the temporary information (step S45).

  If it is determined in step S45 that the digest values match, the block verification unit 35 verifies whether the storage block satisfies the block generation condition using a nonce (step S46).

  If it is confirmed in step S45 that the block generation condition is satisfied, the storage control unit 36 connects the storage block to the ledger data (step S47).

  As described above, in the second embodiment, as in the first embodiment, the information processing system 5 can reduce the storage capacity of the block generation verification device 6 and ensure the authenticity of temporary information. it can.

  In the second embodiment, the block generation verification device 6 generates a digest value of the cache table, and transmits a transmission / reception block including the generated digest value to another block generation verification device 6. For this reason, the other block generation verification device 6 uses the digest value of the cache table described in the block header even if the electronic signature is not given to the temporary information stored in the cache table. Authenticity can be confirmed.

  In addition, the block generation verification device 3 verifies the entire temporary information corresponding to the transaction information connected to the ledger data using the digest value of the temporary information data storage area 323, so that the temporary information data storage area This can be clarified even if any of the temporary information stored in the H.323 is replaced. Thereby, the same effect as 1st Embodiment that the authenticity about the whole temporary information is securable is produced.

  In addition, although the information processing system 1 and the information processing system 5 in the above-mentioned embodiment were described as a bit coin type block chain platform, it is not limited to this. The information processing system 1 and the information processing system 5 may be a program code execution type block chain platform.

  The transaction generation unit 21 of the transaction issuing device 2 generates first transaction information or second transaction information (hereinafter simply referred to as “transaction information”) such that the program code (smart contract) is included in the transaction information. . Note that the transaction generation unit 21 generates transaction information so that a program code in which a specifier (for example, “nohistory” in FIG. 15) specifying a storage area is written in the property is included in the transaction information.

  Further, the transaction generation unit 21 of the transaction issuing device 2 generates transaction information so that one or more of the transaction information and the temporary information includes a program method. When the method argument is the transaction information, the transaction generation unit 21 generates the transaction information so that the method and the argument are included in the transaction information. Further, when the method argument is temporary information, the transaction generation unit 21 generates transaction information in which reference information to the method and temporary information is described in the transaction information.

  In addition, when the program transmitted from the transaction issuing device 2 includes a program code, the storage control unit 36 stores the program code in the ledger data storage area 322. The storage control unit 36 secures areas in the ledger data storage area 322 and the temporary information data storage area 323 based on a specifier designating the storage area described in the property of the program code.

  In addition, when the argument of the method included in the transaction transmitted from the transaction issuing device 2 is described in the transaction information, the storage control unit 36 executes the method and specifies the specifier specified in the property of the execution result. The execution result is stored based on the data, and the argument is stored in the data storage area 322 for ledger data. When there is a description that the method argument is temporary information, the storage control unit 36 executes the method and stores the method based on the specifier specified in the property of the execution result, and the argument is a temporary information data storage area. Stored in H.323.

  The storage control unit 36 deletes the temporary information stored in the temporary information data storage area 323 at a predetermined timing. For example, the storage control unit 36 can delete temporary information related to a transaction when a transaction in which a deletion method is described is issued from the transaction issuing device 2.

  Although the above embodiment has been described as a representative example, it will be apparent to those skilled in the art that many changes and substitutions can be made within the spirit and scope of the invention. Therefore, the present invention should not be construed as being limited by the above-described embodiments, and various modifications and changes can be made without departing from the scope of the claims.

DESCRIPTION OF SYMBOLS 1,5 Information processing system 2 Transaction issuing apparatus 3,6 Block generation verification apparatus 4 Communication network 21 Transaction generation part 22 Electronic signature provision part 23 Transaction communication part 31 Block communication part 32 Storage part 33 Transaction verification part 34 Block generation part 35 Block Verification unit 36 Storage control unit 37 Cache table 321 Ledger data storage area 322 Ledger data storage area 323 Temporary information data storage area

Claims (5)

An information processing system comprising one or more transaction issuing devices that transmit / receive information to / from each other and a plurality of block generation verification devices,
The transaction issuing device
A transaction generator for generating transaction information including the transaction information and temporary information;
A transaction communication unit that transmits the transaction information to the block generation verification device,
The block generation verification device
A block generation unit that generates a storage block that includes the transaction information and a digest value of the transaction information and does not include the temporary information;
A storage control unit for storing the temporary information in a temporary information data storage area, and connecting the storage block to ledger data;
A block communication unit that transmits the temporary information, the transaction information, the digest value of the transaction information, and the digest value of the data storage area for temporary information;
A block for verifying the temporary information based on the digest value calculated from the temporary information data storage area storing the temporary information transmitted from another block generation verification device and the digest value of the temporary information data storage area A verification unit;
An information processing system comprising: The transaction issuing device
An electronic signature providing unit that assigns a first electronic signature to the transaction information and a second electronic signature to the transaction information;
The information processing system according to claim 1, wherein the storage block includes the main transaction information to which the second electronic signature is attached, and does not include temporary information and the first electronic signature. The transaction issuing device
An electronic signature giving unit for giving an electronic signature to the digest value of the transaction information and the temporary information;
The information processing system according to claim 1, wherein the storage block includes the main transaction information to which the electronic signature is attached and a digest value of the temporary information, and does not include the temporary information. The block communication unit further transmits a cache table including temporary information,
The digest value of the cache table received from the other block generation verification device is calculated, and when the calculated digest value matches the digest value of the cache table included in the received block, the other block generation 4. The information processing system according to claim 3, further comprising a block verification unit that verifies a storage block corresponding to the transaction information received from the verification device. When the block verification unit receives the temporary information, the digest value of the transaction information, the digest value of the temporary information data storage area, and the transaction information from the other block generation verification device, the storage block Determines whether the block generation condition is satisfied,
5. The information according to claim 1, wherein the storage control unit connects the storage block to ledger data when it is determined that the storage block satisfies a block generation condition. 6. Processing system.

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