JP7535548B2 - Information display device, information reading device, information display program, information reading program, information display method, information reading method, information transmission system, and information transmission method - Google Patents

Description

The present invention relates to an information display device, an information display program, and an information display method for displaying code information, an information reading device, an information reading program, and an information reading method for reading code information, and an information transmission system and information transmission method for transmitting information.

Conventionally, there is known an information transmission system that acquires predetermined information by reading encrypted information from code information displayed on an information display device and decrypting the read encrypted information with an encryption key used to generate the encrypted information. For example, Patent Document 1 discloses a system that sequentially generates encryption keys, encrypts the encryption keys with the previously generated encryption key, and then displays code information including encrypted information and code information including encryption keys on different information display devices.

JP 2012-054889 A

However, in the system described in Patent Document 1, the encrypted information and the encryption key are displayed as different code information, and the encryption key is encrypted with the previously generated encryption key, which improves security. However, the system must include an information display device that displays code information including the encrypted information, an information display device that displays code information including the encryption key, and an information reading device that reads the code information. This requires two information display devices and requires reading information from each of the two information display devices, which creates problems in that the equipment is complex and multi-dimensional, and the reading operation is cumbersome.

The present invention has been made in consideration of the above problems, and its purpose is to provide an information display device, information reading device, information display program, information reading program, information display method, information reading method, information transmission system, and information transmission method that can improve security and simplify equipment.

The information display device according to the present invention is an information display device that displays code information including encrypted information obtained by encrypting predetermined information using an encryption key on a display unit, and is characterized by comprising an encryption unit that generates the encrypted information using the encryption key, a code information generation unit that generates first code information including the encrypted information and second code information including the encryption key for decrypting the encrypted information, and a display control unit that displays the first code information and the second code information on the display unit at different times.

In the information display device according to the present invention, the encryption unit is configured to generate the encrypted information using a different encryption key at each predetermined time, and it is preferable that the first code information includes an encryption key for decrypting encrypted information included in other code information displayed before or after the first code information.

In the information display device according to the present invention, the second code information may include encrypted information that is decrypted by the encryption key included in other code information that is displayed before or after the second code information.

In the information display device according to the present invention, it is preferable that at least one of the first code information and the second code information includes discrimination information for discriminating the authenticity of the code information.

In the information display device according to the present invention, at least one of the first code information and the second code information may include time information when the code information was generated.

The information reading device according to the present invention is an information reading device capable of reading predetermined information from code information including encrypted information obtained by encrypting the predetermined information using an encryption key, and is characterized by comprising: a reading unit capable of reading the first code information and the second code information from an information display device that displays, at different times, first code information including the encrypted information and second code information including the encryption key for decrypting the encrypted information; an acquisition unit that acquires the encrypted information from the read first code information and acquires the encryption key from the second code information read at a different time from the first code information; and a decryption unit that decrypts the encrypted information using the encryption key to acquire the predetermined information.

The information reading device according to the present invention further includes a storage unit that stores discrimination information for discriminating the authenticity of the code information, and a judgment unit that judges the authenticity of the read code information based on the discrimination information included in the read code information and the discrimination information stored in the storage unit, and it is preferable that the acquisition unit acquires the encryption information and/or the encryption key from the code information when the judgment unit judges that the code information is authentic.

Furthermore, the information display program according to the present invention is an information display program that displays code information including encrypted information obtained by encrypting predetermined information using an encryption key on a display unit of an information display device, and is characterized in that it causes the information display device to execute an encryption process that generates the encrypted information using the encryption key, a code information generation process that generates first code information including the encrypted information and second code information including the encryption key for decrypting the encrypted information, and a display control process that displays the first code information and the second code information on the display unit at different times.

The information reading program according to the present invention is an information reading program capable of reading predetermined information from code information including encrypted information obtained by encrypting the predetermined information using an encryption key, and is characterized in that the information reading program causes an information reading device to execute a reading process for reading the first code information including the encrypted information and the second code information including the encryption key for decrypting the encrypted information from an information display device that displays the first code information including the encrypted information and the second code information including the encryption key for decrypting the encrypted information at different times, an encrypted information acquisition process for acquiring the encrypted information from the read first code information, an encryption key acquisition process for acquiring the encryption key from the second code information read at a different time from the first code information, and a decryption process for decrypting the encrypted information acquired by the encrypted information acquisition process using the encryption key acquired by the encryption key acquisition process to acquire the predetermined information.

Furthermore, the information display method according to the present invention is a method for displaying code information including encrypted information obtained by encrypting predetermined information using an encryption key on a display unit of an information display device, and is characterized in that it includes an encryption step for generating the encrypted information using the encryption key, a code information generation step for generating first code information including the encrypted information and second code information including the encryption key for decrypting the encrypted information, and a display control step for displaying the first code information and the second code information on the display unit at different times.

The information reading method according to the present invention is an information reading method capable of reading predetermined information from code information including encrypted information obtained by encrypting the predetermined information using an encryption key, and is characterized by including a reading step of reading the first code information and the second code information from an information display device that displays, at different times, first code information including the encrypted information and second code information including the encryption key for decrypting the encrypted information, respectively; an encrypted information acquisition step of acquiring the encrypted information from the read first code information; an encryption key acquisition step of acquiring the encryption key from the second code information read at a different time from the first code information; and a decryption step of decrypting the encrypted information acquired by the encrypted information acquisition step using the encryption key acquired by the encryption key acquisition step to acquire the predetermined information.

Furthermore, the information transmission system according to the present invention is an information transmission system comprising an information display device that displays code information including encrypted information obtained by encrypting predetermined information using an encryption key on a display unit, and an information reading device capable of reading the predetermined information from the code information, wherein the information display device comprises an encryption unit that generates the encrypted information using the encryption key, a code information generation unit that generates first code information including the encrypted information and second code information including the encryption key for decrypting the encrypted information, and a display control unit that displays the first code information and the second code information on the display unit at different timings, and the information reading device comprises a reading unit that can read the first code information and the second code information from the information display device, an acquisition unit that acquires the encrypted information from the read first code information and acquires the encryption key from the second code information read at a timing different from that of the first code information, and a decryption unit that decrypts the encrypted information using the encryption key to acquire the predetermined information.

The information transmission method according to the present invention includes an information display method for displaying code information, including encrypted information obtained by encrypting predetermined information using an encryption key, on a display unit of an information display device, and an information reading method capable of reading the predetermined information from the code information, wherein the information display method includes an encryption step for generating the encrypted information using the encryption key, a code information generation step for generating first code information including the encrypted information and second code information including the encryption key for decrypting the encrypted information, and a display control step for displaying the first code information and the second code information on the display unit at different timings, and the information reading method includes a reading step for reading the first code information and the second code information from the information display device, respectively, an encryption information acquisition step for acquiring the encrypted information from the first code information that has been read, an encryption key acquisition step for acquiring the encryption key from the second code information that has been read at a timing different from that of the first code information, and a decryption step for decrypting the encrypted information acquired by the encryption information acquisition step using the encryption key acquired by the encryption key acquisition step to acquire the predetermined information.

The information display device, information reading device, information display program, information reading program, information display method, information reading method, information transmission system, and information transmission method of the present invention can improve security and simplify equipment.

1 is a block diagram showing a configuration of an information transmission system according to an embodiment of the present invention. FIG. 11 is a diagram showing a state in which first code information and second code information are displayed. 10 is a flowchart showing a flow in which the information display device displays the first code information and the second code information. 10 is a flowchart showing a flow in which the information reading device acquires predetermined information from the first code information and the second code information.

The following describes preferred embodiments for carrying out the present invention with reference to the drawings. Note that the following embodiments do not limit the inventions according to the claims, and not all of the combinations of features described in the embodiments are necessarily essential to the solution of the invention. Also, some components may be omitted in the present embodiments.

[Overall configuration of the information transmission system]
The information transmission system 1 according to the present embodiment is a system for transmitting information between a plurality of devices using code information Q. Specifically, as shown in Fig. 1, the information transmission system 1 includes an information display device 100 that displays code information Q, including encrypted information I obtained by encrypting predetermined information using an encryption key K, on a display unit 110, and an information reading device 200 that can read the predetermined information from the code information Q.

The information transmission system 1 according to this embodiment can be applied to, for example, an unlocking system for unlocking an electric lock attached to the inside of a vehicle or the door of a building. In the following, this embodiment will be described on the assumption that the information transmission system 1 is applied to the unlocking system, but the use of the information transmission system 1 is not limited to this.

In this case, the "predetermined information" encrypted by the encryption key K is authentication information for authenticating whether the user who wishes to unlock the electric lock is a user who can be authorized to unlock the electric lock. In this embodiment, the code information Q may be, for example, a one-dimensional code, a two-dimensional code, or an RFID tag, and it is preferable to use a two-dimensional code, and it is even more preferable to use a matrix type two-dimensional code.

[Configuration of information display device 100]
1 and 2, the information display device 100 is a portable information terminal carried by a user, such as a smartphone or a tablet terminal. Specifically, the information display device 100 includes a display unit 110 that displays code information Q, and an operation unit 120 that accepts user operations. The information display device 100 also includes a storage unit 130 that stores authentication information and the like, and a control unit 140 that controls the entire information display device 100.

The display unit 110 is, for example, a liquid crystal display or an organic EL display, and is configured to be capable of displaying various information such as code information Q. The operation unit 120 is, for example, a hardware button or a touch panel, and is configured to accept operations such as user input to the information display device 100.

The storage unit 130 is, for example, a memory or storage such as a RAM or a ROM. Specifically, the storage unit 130 includes a data storage area 131 that stores authentication information and the like, and a program storage area 132 that stores an information display program.

The information display program is a program that includes various commands for operating the encryption unit 141, the code information generation unit 142, the display control unit 143, and the operation control unit 144 of the control unit 140, which will be described later. Therefore, the operations performed by the encryption unit 141, the code information generation unit 142, the display control unit 143, and the operation control unit 144 are performed in accordance with the information display program.

The data storage area 131 stores authentication information, encryption key K, encrypted information I, discrimination information for discriminating the authenticity of code information Q, code information Q, and time information when code information Q was generated. The authentication information includes a user ID, a work number, authentication destination information (information on the electric lock), and a valid time range indicating the time period during which the electric lock can be unlocked. In this embodiment, the authentication information can be obtained, for example, by successful user authentication in an external system (not shown) connected to the information display device 100 via an application, web browser, etc.

In this embodiment, the discrimination information is a key phrase arbitrarily set by the user to allow the information reading device 200 to discriminate the authenticity of the code information Q, and an arbitrary key phrase such as "hawk swallow" can be set. In addition, the discrimination information (key phrase) can be set to a different phrase for each system to which the information transmission system 1 is applied, for example, by setting "hawk swallow" when the specified information is used to unlock an electric lock as in this embodiment, and setting a different key phrase when the specified information is used for other purposes. In this way, different discrimination information is applied to each system to which the information transmission system 1 is applied, and the specified information can be obtained only when the information reading device 200 obtains the discrimination information applied to the system, thereby improving security.

The control unit 140 is, for example, a processor such as a CPU or a GPU. Specifically, the control unit 140 includes an encryption unit 141 that generates encrypted information I using an encryption key K, a code information generation unit 142 that generates code information Q using the encryption information I and the encryption key K, a display control unit 143 that displays the code information Q on the display unit 110, and an operation control unit 144 that controls the operation unit 120.

The information display device 100 according to this embodiment is configured to deploy the information display program stored in the program storage area 132 of the memory unit 130 in the RAM, and have the CPU and GPU interpret and execute the program, thereby realizing the various functions of the encryption unit 141, the code information generation unit 142, the display control unit 143, and the operation control unit 144.

The encryption unit 141 is configured to encrypt authentication information using an encryption key K and generate encrypted information I, and is configured to generate encrypted information I using a different encryption key K at each predetermined time. The encryption key K and encrypted information I generated by the encryption unit 141 are stored sequentially in the data storage area 131 of the memory unit 130. In this embodiment, the predetermined time for generating encrypted information may be every few seconds or every few minutes.

The code information generating unit 142 is configured to generate code information Q using the encryption key K and encryption information I stored in the data storage area 131 of the memory unit 130, and is configured to generate code information Q including different encryption information I and encryption key K at predetermined time intervals. The code information Q generated by the code information generating unit 142 is stored sequentially in the data storage area 131 of the memory unit 130. In this embodiment, the predetermined time for generating the code information Q may be synchronized with the time when the encryption unit 141 generates the encryption key K and encryption information I, or the code information Q may be generated every few seconds or every few minutes without synchronization.

The display control unit 143 is configured to display the code information Q stored in the data storage area 131 of the memory unit 130 on the display unit 110, and is configured to display different code information Q on the display unit 110 at predetermined times. In this embodiment, the predetermined time for displaying the code information Q on the display unit 110 may be synchronized with the time when the encryption unit 141 generates the encryption key K and the encryption information I and the time when the code information generation unit 142 generates the code information Q, or may be displayed every few seconds or every few minutes without synchronization.

In the following, in this embodiment, as shown in FIG. 2, the code information Q being displayed on the display unit 110 by the display control unit 143 is referred to as the first code information Q1, and the code information Q displayed next to the first code information Q1 is referred to as the second code information Q2, and the information contained in the code information Q and the configuration of the information reading device 200 described below will be described. In addition, the encrypted information I contained in the first code information Q1 will be described as the encrypted information I1, and the encryption key K contained in the second code information Q2 will be described as the encryption key K1.

In this embodiment, the code information Q displayed after the first code information Q1 is the second code information Q2, but this is not limited thereto, and it is sufficient that the first code information Q1 including the encryption information I1 and the second code information Q2 including the encryption key K1 are displayed on the display unit 110 at different times. For example, the code information Q being displayed on the display unit 110 may be the second code information Q2, and the code information Q displayed after the second code information Q2 may be the first code information Q1, or the code information Q displayed before or just before the first code information Q1 may be the second code information Q2, or the code information Q displayed the second, third, etc. time after the first code information Q1 is displayed may be the second code information Q2.

The first code information Q1 includes an encryption key K for decrypting the encrypted information I included in other code information Q displayed before or after the first code information Q1. In this embodiment, the first code information Q1 includes an encryption key Ka for decrypting the encrypted information Ia included in other code information Qa displayed before the first code information Q1, and specifically includes an encryption key Ka for decrypting the encrypted information Ia included in other code information Qa displayed immediately before the first code information Q1.

The second code information Q2 includes encrypted information I that is decrypted by an encryption key K included in other code information Q that is displayed before or after the second code information Q2. In this embodiment, the second code information Q2 includes encrypted information Ib that is decrypted by an encryption key Kb included in other code information Qb that is displayed after the second code information Q2, and specifically, includes encrypted information Ib that is decrypted by an encryption key Kb included in other code information Qb that is displayed next to the second code information Q2.

The first code information Q1 and the second code information Q2 include discrimination information and time information. Note that at least one of the first code information Q1 and the second code information Q2 may include discrimination information and time information.

In other words, in this embodiment, the code information generation unit 142 is configured to generate the first code information Q1 based on the encryption information I1, the encryption key Ka, the discrimination information, and the time information, and is configured to generate the second code information Q2 based on the encryption information Ib, the encryption key K1, the discrimination information, and the time information.

[Configuration of information reading device]
The information reading device 200 is a code reader that can be attached to a door to which an electric lock is attached or to a wall near the door, or that can be placed near the door. Specifically, the information reading device 200 includes a reading unit 210 that can read the first code information Q1 and the second code information Q2 from the information display device 100. The information reading device 200 also includes a memory unit 220 that stores information read from the code information Q and a control unit 230 that controls the entire information reading device 200.

The reading unit 210 is configured to be able to read the code information Q displayed as the first code information Q1 and the second code information Q2 from the information display device 100 by various known reading means. The memory unit 220 includes a data storage area 221 that stores information read from the code information Q, and a program storage area 222 that stores an information reading program.

The information reading program is a program that includes various commands for operating the acquisition unit 231, the decryption unit 232, the determination unit 233, and the reading control unit 234 of the control unit 230, which will be described later. Therefore, the operations performed by the acquisition unit 231, the decryption unit 232, the determination unit 233, and the reading control unit 234 are performed in accordance with the information reading program.

The data storage area 221 sequentially stores the encryption key K, encryption information I, discrimination information, and time information read from the code information Q displayed as the first code information Q1 and the second code information Q2. The data storage area 221 also stores the encryption information I acquired as the encryption information I1 by the acquisition unit 231 described later, the encryption key K acquired as the encryption key K1, discrimination information stored in advance to discriminate the authenticity of the code information Q, and authentication information acquired by decrypting the encryption information I1 with the encryption key K1. The discrimination information is the same discrimination information as the discrimination information stored in the data storage area 131 of the storage unit 130 of the information display device 100, and is stored in advance in the data storage area 221 of the storage unit 220 by a system administrator or the like.

The control unit 230 includes an acquisition unit 231 that acquires encrypted information I1 from the read first code information Q1 and acquires an encryption key K1 from second code information Q2 that is read at a different timing from the first code information Q1, a decryption unit 232 that decrypts the encrypted information I1 using the encryption key K1 to acquire authentication information (predetermined information), a determination unit 233 that determines the authenticity of the read code information Q, and a reading control unit 234 that controls the reading unit 210.

The acquisition unit 231 is configured to acquire encrypted information I, which is encrypted information I1, from information contained in the first code information Q1 stored in the data storage area 221 of the memory unit 220, i.e., encrypted information I1, an encryption key Ka for decrypting encrypted information Ia contained in other code information Qa, discrimination information, and time information. The encrypted information I, which is encrypted information I1 acquired by the acquisition unit 231, is stored separately in the data storage area 221 of the memory unit 220.

The acquisition unit 231 is also configured to acquire the encryption key K, which is the encryption key K1, from the information contained in the second code information Q2 stored in the data storage area 221 of the memory unit 220, i.e., the encrypted information Ib decrypted by the encryption key Kb contained in the other code information Qb, the encryption key K1, the discrimination information, and the time information. The encryption key K, which is the encryption key K1 acquired by the acquisition unit 231, is stored separately in the data storage area 221 of the memory unit 220.

The decryption unit 232 is configured to decrypt the encrypted information I, which is the encrypted information I1 stored in the data storage area 221 of the memory unit 220, using the encryption key K, which is the encryption key K1, to obtain authentication information (predetermined information). The authentication information obtained by the decryption unit 232 is stored in the data storage area 221 of the memory unit 220.

The determination unit 233 is configured to determine the authenticity of the read code information Q based on the discrimination information included in the code information Q (first code information Q1 and second code information Q2) read by the reading unit 210 and the discrimination information stored in advance in the data storage area 221 of the storage unit 220. Specifically, when the discrimination information included in the code information Q read by the reading unit 210 matches the discrimination information stored in the data storage area 221 of the storage unit 220, the determination unit 233 determines that the read code information Q is authentic.

If the discrimination information included in the read code information Q does not match the discrimination information stored in the data storage area 221 of the memory unit 220, it is determined that the read code information Q is not authentic. Furthermore, the acquisition unit 231 is configured to acquire encryption information and/or an encryption key from the code information Q when the determination unit 233 determines that the code information Q is authentic.

Specifically, when the determination unit 233 determines that the code information Q is genuine, the acquisition unit 231 is configured to acquire the encrypted information I, which is the encrypted information I1, from the code information Q displayed as the first code information Q1, and to acquire the encryption key K, which is the encryption key K1, from the code information Q displayed as the second code information Q2.

[Method of communication]
Hereinafter, an information transmission method using the information transmission system 1 according to the present embodiment will be described with reference to Fig. 3 and Fig. 4. Fig. 3 is a flowchart showing a flow in which the information display device 100 according to the present embodiment displays the first code information Q1 and the second code information Q2. Fig. 4 is a flowchart showing a flow in which the information reading device 200 according to the present embodiment acquires authentication information (predetermined information) from the first code information Q1 and the second code information Q2.

[Information display method]
First, the user of the information display device 100 performs user authentication in an external system (not shown) connected to the information display device 100 via an application, a web browser, or the like, and obtains authentication information when the user authentication is successful (S1). The encryption unit 141 of the information display device 100 encrypts the authentication information using a different encryption key K at each predetermined time, and generates encrypted information I (S2). Next, the code information generation unit 142 of the information display device 100 generates first code information Q1 based on the encryption information I1, the encryption key Ka, the discrimination information, and the time information (S3). The generated first code information Q1 is displayed on the display unit 110 by the display control unit 143 (S4).

In addition, the code information generating unit 142 of the information display device 100 generates second code information Q2 based on the encryption information Ib, the encryption key K1, the discrimination information, and the time information after a predetermined time has elapsed since generating the first code information Q1 (S5). The generated second code information Q2 is displayed on the display unit 110 by the display control unit 143 (S6).

For example, if the encrypted information I and encryption key K generated by the encryption unit 141 at every predetermined time are the encrypted information I and encryption key K generated nth (n is an integer equal to or greater than 2) as encrypted information I1 and encryption key K1, the first code information Q1 includes the nth encrypted information I, which is encrypted information I1, the n-1th encryption key K, which is encryption key Ka, discrimination information, and time information, and the second code information Q2 includes the n+1th encrypted information I, which is encrypted information Ib, the nth encryption key K, which is encryption key K1, discrimination information, and time information.

Furthermore, if the encrypted information I and encryption key K generated n+1th are encrypted information I1 and encryption key K1, the first code information Q1 contains the n+1th encrypted information I, which is encrypted information I1, the nth encryption key K, which is encryption key Ka, discrimination information, and time information, and the second code information Q2 contains the n+2th encrypted information I, which is encrypted information Ib, the n+1th encryption key K, which is encryption key K1, discrimination information, and time information.

The information display device 100 according to this embodiment repeats the above steps (S2 to S6) until the first code information Q1 and the second code information Q2 are read by the information reading device 200. In this way, by displaying the second code information Q2 next to the first code information Q1, the interval between displaying the first code information Q1 and displaying the second code information Q2 is shortened, thereby reducing the burden on the information reading device 200 during reading.

[How to read information]
The information reading device 200 reads the code information Q displayed as the first code information Q1 on the display unit 110 of the information display device 100 by the reading unit 210 (S7). After the reading, the determination unit 233 determines the authenticity of the code information Q based on the discrimination information included in the code information Q displayed as the first code information Q1 and the discrimination information stored in the data storage area 221 of the storage unit 220 of the information reading device 200 (S8). If it is determined that the code information Q is authentic, the acquisition unit 231 acquires the encrypted information I, which is the encrypted information I1, from the code information Q (S9). The acquired encrypted information I is stored in the data storage area 221. If it is determined that the code information Q is not authentic, the first code information Q1 is read again without acquiring the encrypted information I as the encrypted information I1.

The reading unit 210 also reads the code information Q displayed as the second code information Q2 after the first code information Q1 (S10). If the first code information Q1 and the second code information Q2 are not read consecutively, the first code information Q1 is read again. When the reading unit 210 reads the second code information Q2, the judgment unit 233 judges the authenticity of the code information Q based on the discrimination information included in the code information Q displayed as the second code information Q2 and the discrimination information stored in the data storage area 221 of the memory unit 220 of the information reading device 200 (S11).

If it is determined that the code information Q is authentic, the acquisition unit 231 acquires the encryption key K, which is the encryption key K1, from the code information Q (S12). The acquired encryption key K is stored in the data storage area 221. If it is determined that the code information Q is not authentic, the encryption key K is not acquired as the encryption key K1, and the second code information Q2 is read again. Then, when the encrypted information I, which is the encrypted information I1, and the encryption key K, which is the encryption key K1, are stored in the data storage area 221, the stored encrypted information I is decrypted with the encryption key K to acquire the authentication information (S13). Furthermore, when the information reading device 200 acquires the authentication information, it transmits an unlocking signal to an electric lock (not shown), and the electric lock is unlocked.

[Advantages of the information transmission system according to this embodiment]
As described above, the information transmission system 1 according to the present embodiment is an information transmission system 1 including an information display device 100 that displays on a display unit 110 code information Q including encrypted information I obtained by encrypting predetermined information using an encryption key K, and an information reading device 200 that can read the predetermined information from the code information Q. The information display device 100 includes an encryption unit 141 that generates encrypted information I using the encryption key K, a code information generation unit 142 that generates first code information Q1 including encrypted information I1 and second code information Q2 including an encryption key K1 for decrypting the encrypted information I1, and a code information generation unit 143 that generates the first code information Q1 including encrypted information I1 and the second code information Q2 including an encryption key K1 for decrypting the encrypted information I1. The information reading device 200 is equipped with a display control unit 143 that displays the information Q1 and the second code information Q2 on the display unit 110 at different timings, and the information reading device 200 is equipped with a reading unit 210 that can read the first code information Q1 and the second code information Q2 from the information display device 100, an acquisition unit 231 that acquires encrypted information I1 from the read first code information Q1 and acquires an encryption key K1 from the second code information Q2 read at a timing different from the first code information Q1, and a decryption unit 232 that decrypts the encrypted information I1 using the encryption key K1 to acquire specified information.

According to the information transmission system 1 having such a configuration, the information reading device 200 directly reads both the first code information Q1 and the second code information Q2 displayed on the information display device 100, thereby obtaining the encrypted information I1 and the encryption key K1, as well as obtaining the specified information. Therefore, since the encrypted information I1 and the encryption key K1 are not placed on the network, security can be improved. In addition, by including the encrypted information I1 and the encryption key K1 in different code information Q (the first code information Q1 and the second code information Q2), there is a significant advantage in that security can be significantly improved. In other words, for example, even if either the first code information Q1 or the second code information Q2 is leaked to a third party, the encryption cannot be decrypted with only the code information Q, so information leakage can be prevented.

In addition, since the information reading device 200 needs to directly read both the first code information Q1 and the second code information Q2, even if a third party attempts to forge the code information Q, both the first code information Q1 and the second code information Q2 are required to decrypt the encryption. This makes it possible to create a situation that is far more difficult than forging a single piece of code information Q. This makes it possible to prevent the forgery of code information Q and, ultimately, the reading of the forged code information Q, and therefore prevents a situation in which the information reading device 200 reads malicious code information Q forged by a third party, thereby obtaining unintended information from the forged code information Q, and as a result, causing a malfunction in the system or the like where the code information Q is read.

In addition, since the information display device 100 displays the first code information Q1 including the encrypted information I1 and the second code information Q2 including the encryption key K1 on the display unit 110 at different times, there is a significant advantage in that security can be further improved. Also, since it is sufficient for the system to have only one information display device 100 and one information reading device 200, there is also an advantage in that the equipment can be simplified. Furthermore, since the information reading device 200 can transmit information simply by reading the first code information Q1 and second code information Q2 displayed on the information display device 100, there is also an advantage in that convenience of information transmission and the above-mentioned improved security can be achieved at the same time.

In the information transmission system 1 according to the present embodiment, the information display device 100 is configured such that the encryption unit 141 generates encrypted information I using a different encryption key K at each predetermined time, and the first code information Q1 includes an encryption key Ka for decrypting encrypted information Ia included in other code information Qa displayed before or after the first code information Q1. Furthermore, in the information transmission system 1 according to the present embodiment, the second code information Q2 includes encrypted information Ib to be decrypted by an encryption key Kb included in other code information Qb displayed before or after the second code information Q2. According to the information transmission system 1 having such a configuration, the encryption unit 141 generates encrypted information I using a different encryption key K at each predetermined time, which has the advantage of improving security. In addition, since the first code information Q1 includes an encryption key Ka for decrypting encrypted information Ia included in other code information Qa, and the second code information Q2 includes encrypted information Ib to be decrypted by an encryption key Kb included in other code information Qb, the period for displaying the first code information Q1 and the second code information Q2 can be made faster.

In addition, in the information transmission system 1 according to this embodiment, at least one of the first code information Q1 and the second code information Q2 includes discrimination information for discriminating the authenticity of the code information Q. The information transmission system 1 having such a configuration has the advantage of being able to improve security since it is possible to discriminate the authenticity of the first code information Q1 and/or the second code information Q2.

Furthermore, in the information transmission system 1 according to this embodiment, at least one of the first code information Q1 and the second code information Q2 includes time information at which the code information Q was generated. According to the information transmission system 1 having such a configuration, since the first code information Q1 and/or the second code information Q2 includes time information, the code information Q can be randomized, which has the advantage of improving security.

In addition, in the information transmission system 1 according to this embodiment, the information reading device 200 further includes a memory unit 220 that stores discrimination information for discriminating the authenticity of the code information Q, and a judgment unit 233 that judges the authenticity of the read code information Q based on the discrimination information included in the read code information Q and the discrimination information stored in the memory unit 220, and the acquisition unit 231 is configured to acquire the encrypted information I and/or the encryption key K from the code information Q when the judgment unit 233 judges that the code information Q is authentic. According to the information transmission system 1 having such a configuration, the encrypted information I and/or the encryption key K is acquired only when the judgment unit 233 judges that the code information Q is authentic, which has the advantage of improving security.

[Variations]
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the technical spirit of the present invention.

For example, in the above embodiment, the information transmission system 1 has been described as being applicable to an unlocking system, but is not limited thereto, and may be applied when transmitting predetermined information from an information display device 100 connected to a certain system to an information reading device 200 connected to a different system. In this case, for example, a smartphone, a tablet terminal, etc. can be used as the information display device 100 and the information reading device 200.

The information transmission system according to the present invention can also be applied, for example, when logging in to a system on the information display device 100. In this case, the "predetermined information" is a passcode. That is, when logging in to a system on the information display device 100, the passcode required for logging in may be encrypted and displayed on the information display device 100 as code information Q, and the information reading device 200 may read this to obtain the passcode required for logging in. A user using the information display device 100 can log in to the system by inputting the passcode obtained by the information reading device 200 into the login screen of the information display device 100. Also, for example, a smartphone, tablet terminal, or personal computer can be used as the information display device 100, and for example, a smartphone, tablet terminal, or the like can be used as the information reading device 200.

Furthermore, in the above-described embodiment, the encryption unit 141 has been described as being configured to generate encrypted information I using a different encryption key K at each predetermined time, but this is not limited thereto, and the encryption unit 141 may be configured to generate encrypted information I using one type of encryption key K, and the display control unit 143 may be configured to periodically display one type of encrypted information I and one type of encryption key K on the display unit 110 as first code information Q1 and second code information Q2.

In the above embodiment, the first code information Q1 includes an encryption key Ka for decrypting encrypted information Ia included in other code information Qa displayed before or after the first code information Q1, and the second code information Q2 includes encrypted information Ib that is decrypted by an encryption key Kb included in other code information Qb displayed before or after the second code information Q2. However, this is not limited to this, and the first code information Q1 may include only encrypted information I1, and the second code information Q2 may include only encryption key K1 for decrypting encrypted information I1.

Furthermore, in the above-described embodiment, the first code information Q1 and the second code information Q2 displayed on the display unit 110 of the information display device 100 include discrimination information for discriminating the authenticity of the code information Q, and the discrimination information is stored in the memory unit 220 of the information reading device 200. The discrimination unit 233 determines the authenticity of the read code information Q based on the discrimination information included in the read code information Q and the discrimination information stored in the memory unit 220. However, this is not limited to this, and the first code information Q1, the second code information Q2, and the memory unit 220 may not include or store discrimination information, and the configuration may not include the judgment unit 233.

In addition, in the above-described embodiment, the first code information Q1 and the second code information Q2 are described as including time information at which the code information was generated, but this is not limited thereto, and the first code information Q1 and the second code information Q2 may be configured not to include time information.

It is clear from the claims that the above-mentioned modifications are included within the scope of the present invention.

1: Information transmission system 100: Information display device 110: Display unit 120: Operation unit 130: Memory unit 131: Data storage area 132: Program storage area 140: Control unit 141: Encryption unit 142: Code information generation unit 143: Display control unit 144: Operation control unit 200: Information reading device 210: Reading unit 220: Memory unit 221: Data storage area 222: Program storage area 230: Control unit 231: Acquisition unit 232: Decryption unit 233: Determination unit 234: Reading control unit Q1: First code information Q2: Second code information

Claims (11)

An information display device that displays code information including encrypted information obtained by encrypting predetermined information using an encryption key on a display unit,
an encryption unit that generates the encrypted information using the encryption key;
a code information generating unit that generates first code information including the encrypted information and second code information including the encryption key for decrypting the encrypted information;
a display control unit that displays the first code information and the second code information on the display unit at different timings ,
the encryption unit is configured to generate the encrypted information using a different encryption key at each predetermined time;
The code information generating unit, when generating the first code information and the second code information,
A process of generating the first code information so that the first code information includes the encrypted information and an encryption key for decrypting encrypted information included in other code information displayed before or after the first code information; and
A process of generating the second code information so that the second code information includes the encryption key and encrypted information to be decrypted by the encryption key included in other code information displayed before or after the second code information.
is configured to perform at least one of the following operations:
1. An information display device comprising: 2 . The information display device according to claim 1 , wherein at least one of the first code information and the second code information includes discrimination information for discriminating authenticity of the code information. 3 . The information display device according to claim 1 , wherein at least one of the first code information and the second code information includes time information when the code information was generated. 4 . An information reading device capable of reading predetermined information from code information including encrypted information obtained by encrypting the predetermined information using an encryption key, comprising:
a reading unit capable of reading the first code information and the second code information from an information display device that displays, at different times, first code information including the encrypted information and second code information including the encryption key for decrypting the encrypted information;
an acquisition unit that acquires the encryption information from the first code information that has been read, and acquires the encryption key from the second code information that has been read at a timing different from that of the first code information;
a decryption unit that decrypts the encrypted information using the encryption key to obtain the predetermined information ,
The information display device includes:
A process of displaying the first code information including the encrypted information and an encryption key for decrypting encrypted information included in other code information displayed before or after the first code information; and
A process of displaying the second code information including the encryption key and encrypted information to be decrypted by the encryption key included in other code information displayed before or after the second code information.
The method is configured to perform at least one of the following processes:
The acquisition unit is
A process of acquiring, from the read first code information, the encrypted information and an encryption key for decrypting encrypted information included in other code information displayed before or after the first code information; and
A process of obtaining, from the read second code information, the encryption key and encrypted information to be decrypted by the encryption key included in other code information displayed before or after the second code information.
is configured to perform at least one of the following operations:
An information reading device comprising: a storage unit for storing discrimination information for discriminating the authenticity of the code information;
and a determination unit that determines the authenticity of the read code information based on discrimination information included in the read code information and the discrimination information stored in the storage unit,
The information reading device according to claim 4 , wherein the acquisition unit acquires the encrypted information and/or the encryption key from the code information when the determination unit determines that the code information is authentic. An information display program for displaying code information including encrypted information obtained by encrypting predetermined information using an encryption key on a display unit of an information display device, comprising:
an encryption process for generating the encrypted information using the encryption key;
a code information generating process for generating first code information including the encrypted information and second code information including the encryption key for decrypting the encrypted information;
a display control process for displaying the first code information and the second code information on the display unit at different timings ,
the encryption process includes a process of generating the encrypted information using a different encryption key at each predetermined time;
The code information generation process includes, when generating the first code information and the second code information,
A process of generating the first code information so that the first code information includes the encrypted information and an encryption key for decrypting encrypted information included in other code information displayed before or after the first code information; and
A process of generating the second code information so that the second code information includes the encryption key and encrypted information to be decrypted by the encryption key included in other code information displayed before or after the second code information.
and causing the information display device to execute at least one of the processes.
23. An information display program comprising: An information reading program capable of reading predetermined information from code information including encrypted information obtained by encrypting the predetermined information using an encryption key, comprising:
a reading process of reading first code information including the encrypted information and second code information including the encryption key for decrypting the encrypted information from an information display device that displays the first code information and the second code information at different timings;
an encryption information acquisition process for acquiring the encryption information from the read first code information;
an encryption key acquisition process for acquiring the encryption key from the second code information read at a timing different from that of the first code information;
a decryption process for decrypting the encrypted information obtained by the encrypted information obtaining process using the encryption key obtained by the encryption key obtaining process to obtain the predetermined information ,
The information display device includes:
A process of displaying the first code information including the encrypted information and an encryption key for decrypting encrypted information included in other code information displayed before or after the first code information; and
A process of displaying the second code information including the encryption key and encrypted information to be decrypted by the encryption key included in other code information displayed before or after the second code information.
The method is configured to perform at least one of the following processes:
The information reading program is
a process of acquiring, as the encrypted information acquisition process, from the first code information that has been read, the encrypted information and an encryption key for decrypting encrypted information included in other code information that is displayed before or after the first code information; and
The encryption key acquisition process includes acquiring, from the read second code information, the encryption key and encrypted information to be decrypted by the encryption key included in other code information displayed before or after the second code information.
and causing the information reading device to execute at least one of the processes.
2. An information reading program comprising: 1. An information display method for displaying code information including encrypted information obtained by encrypting predetermined information using an encryption key on a display unit of an information display device, comprising:
an encryption step of generating the encrypted information using the encryption key;
a code information generating step of generating first code information including the encrypted information and second code information including the encryption key for decrypting the encrypted information;
a display control step of displaying the first code information and the second code information on the display unit at different timings ,
the encryption step includes a step of generating the encrypted information using a different encryption key at each predetermined time;
In generating the first code information and the second code information, the code information generating step
generating the first code information so that the first code information includes the encrypted information and an encryption key for decrypting encrypted information included in other code information displayed before or after the first code information;
generating the second code information so that the second code information includes the encryption key and encrypted information to be decrypted by the encryption key included in other code information displayed before or after the second code information;
The method includes at least one of the steps
13. An information display method comprising: 1. An information reading method capable of reading predetermined information from code information including encrypted information obtained by encrypting the predetermined information using an encryption key, comprising:
a reading step of reading the first code information and the second code information from an information display device that displays, at different timings, first code information including the encrypted information and second code information including the encryption key for decrypting the encrypted information;
an encryption information acquiring step of acquiring the encryption information from the first code information that has been read;
an encryption key obtaining step of obtaining the encryption key from the second code information read at a timing different from that of the first code information;
a decryption step of decrypting the encrypted information acquired in the encrypted information acquisition step by using the encryption key acquired in the encryption key acquisition step to acquire the predetermined information ,
The information display device includes:
A process of displaying the first code information including the encrypted information and an encryption key for decrypting encrypted information included in other code information displayed before or after the first code information; and
A process of displaying the second code information including the encryption key and encrypted information to be decrypted by the encryption key included in other code information displayed before or after the second code information.
The method is configured to perform at least one of the following processes:
The information reading method includes:
a step of acquiring, as the encrypted information acquiring step, from the read first code information, the encrypted information and an encryption key for decrypting encrypted information included in other code information displayed before or after the first code information;
The encryption key acquisition step includes acquiring, from the read second code information, the encryption key and encrypted information to be decrypted by the encryption key included in other code information displayed before or after the second code information.
The method includes at least one of the steps
23. An information reading method comprising: An information transmission system comprising: an information display device that displays code information including encrypted information obtained by encrypting predetermined information using an encryption key on a display unit; and an information reading device that can read the predetermined information from the code information,
The information display device includes:
an encryption unit that generates the encrypted information using the encryption key;
a code information generating unit that generates first code information including the encrypted information and second code information including the encryption key for decrypting the encrypted information;
a display control unit that displays the first code information and the second code information on the display unit at different timings,
the encryption unit is configured to generate the encrypted information using a different encryption key at each predetermined time;
The code information generating unit, when generating the first code information and the second code information,
A process of generating the first code information so that the first code information includes the encrypted information and an encryption key for decrypting encrypted information included in other code information displayed before or after the first code information; and
A process of generating the second code information so that the second code information includes the encryption key and encrypted information to be decrypted by the encryption key included in other code information displayed before or after the second code information.
The method is configured to perform at least one of the following processes:
The information reading device is
a reading unit capable of reading the first code information and the second code information from the information display device;
an acquisition unit that acquires the encryption information from the first code information that has been read, and acquires the encryption key from the second code information that has been read at a timing different from that of the first code information;
a decryption unit that decrypts the encrypted information using the encryption key to obtain the predetermined information. An information transmission method including: an information display method for displaying code information, including encrypted information obtained by encrypting predetermined information using an encryption key, on a display unit of an information display device; and an information reading method for reading the predetermined information from the code information,
The information display method includes:
an encryption step of generating the encrypted information using the encryption key;
a code information generating step of generating first code information including the encrypted information and second code information including the encryption key for decrypting the encrypted information;
a display control step of displaying the first code information and the second code information on the display unit at different timings ,
the encryption step includes a step of generating the encrypted information using a different encryption key at each predetermined time;
In generating the first code information and the second code information, the code information generating step
generating the first code information so that the first code information includes the encrypted information and an encryption key for decrypting encrypted information included in other code information displayed before or after the first code information;
generating the second code information so that the second code information includes the encryption key and encrypted information to be decrypted by the encryption key included in other code information displayed before or after the second code information;
The method includes at least one of the steps of
The information reading method includes:
a reading step of reading the first code information and the second code information from the information display device;
an encryption information acquiring step of acquiring the encryption information from the first code information that has been read;
an encryption key obtaining step of obtaining the encryption key from the second code information read at a timing different from that of the first code information;
a decryption step of decrypting the encrypted information acquired in the encrypted information acquisition step using the encryption key acquired in the encryption key acquisition step to acquire the specified information.

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