Information processing apparatus, and information processing method

1. A non-transitory computer-readable recording medium having stored therein an information processing program that causes a computer to execute a process comprising:

generating feature information based on organism information of a user;

calculating a first cryptogram based on a logical operation of the feature information generated and a random number;

encrypting the first cryptogram into a second cryptogram by using a cryptographic algorithm capable of calculating a Hamming distance in an encrypted state; and

transmitting the encrypted second cryptogram to a network to which a server having a key that decrypts the encrypted Hamming distance is connected.

2. The non-transitory computer-readable recording medium according to claim 1 , wherein the calculating calculates the first cryptogram based on an exclusive logical sum as the logical operation.

3. The non-transitory computer-readable recording medium according to claim 1 , wherein the encrypting encrypts the first cryptogram into the second cryptogram by using homomorphic encryption as the cryptographic algorithm.

4. The non-transitory computer-readable recording medium according to claim 1 , wherein the calculating calculates the first cryptogram by using a random number unique to the user as the random number.

5. The non-transitory computer-readable recording medium according to claim 1 , the information processing program causing the computer to execute the process further comprising:

controlling whether to perform the encrypting in a case out of both of when registration of the feature information is performed and when verification of the feature information is performed, when the registration of the feature information is performed, and when the verification of the feature information is performed.

6. An information processing apparatus, comprising:

a processor that executes a process including

generating feature information based on organism information of a user;

calculating a first cryptogram based on a logical operation of the feature information generated and a random number;

encrypting the first cryptogram into a second cryptogram by using a cryptographic algorithm capable of calculating a Hamming distance in an encrypted state; and

transmitting the encrypted second cryptogram to a network to which a server having a key that decrypts the encrypted Hamming distance is connected.

7. The information processing apparatus, according to claim 6 , wherein the calculating calculates the first cryptogram based on an exclusive logical sum as the logical operation.

8. An information processing method comprising:

generating, when registration of feature information based on organism information of a user is performed, the feature information, using a processor;

calculating a first cryptogram based on a logical operation of the feature information generated and a random number, using the processor;

encrypting the first cryptogram into a second cryptogram by using a cryptographic algorithm capable of calculating a Hamming distance in an encrypted state, using the processor;

generating, when verification of the feature information is performed, the feature information, using the processor;

calculating a first cryptogram based on a logical operation of the feature information generated and the random number, using the processor;

encrypting the first cryptogram into a second cryptogram by using a cryptographic algorithm capable of calculating a Hamming distance in an encrypted state, using the processor; and

transmitting the encrypted second cryptogram to a network to which a server having a key that decrypts the encrypted Hamming distance is connected.

9. The information processing method according to claim 8 , wherein the calculating of the first cryptogram calculates the first cryptogram based on an exclusive logical sum as the logical operation.

10. An information processing method comprising:

generating, when registration of feature information based on organism information of a user is performed, the feature information, using a processor;

calculating a first cryptogram based on a logical operation of the feature information generated and a random number, using the processor;

encrypting the first cryptogram into a second cryptogram by using a cryptographic algorithm capable of calculating a Hamming distance in an encrypted state, using the processor;

transmitting the encrypted second cryptogram to a network to which a server having a key that decrypts the encrypted Hamming distance is connected, using the processor;

generating, when verification of the feature information is performed, the feature information, using the processor;

calculating a first cryptogram based on a logical operation of the feature information generated and the random number, using the processor; and

transmitting the calculated first cryptogram to the network, using the processor.

11. The information processing method according to claim 10 , wherein the calculating of the first cryptogram calculates the first cryptogram based on an exclusive logical sum as the logical operation.

12. An information processing method comprising:

generating, when registration of feature information based on organism information of a user is performed, the feature information, using a processor;

calculating a first cryptogram based on a logical operation of the feature information generated and a random number, using the processor;

transmitting the calculated first cryptogram to a network, using the processor;

generating, when verification of the feature information is performed, the feature information, using the processor;

calculating a first cryptogram based on a logical operation of the feature information generated and the random number, using the processor;

encrypting the first cryptogram into a second cryptogram by using a cryptographic algorithm capable of calculating a Hamming distance in an encrypted state by a calculation server, using the processor; and

transmitting the encrypted second cryptogram to the network, using the processor,

wherein a server having a key that decrypts the encrypted Hamming distance is connected to the network.

13. The information processing method according to claim 12 , wherein the calculating of the first cryptogram calculates the first cryptogram based on an exclusive logical sum as the logical operation.

14. An information processing system comprising:

an information processing apparatus;

a calculation server; and

an authentication server,

the information processing apparatus having

a first processor that executes a process including

generating feature information based on organism information of a user;

calculating a first cryptogram based on a logical operation of the feature information generated and a random number;

encrypting the first cryptogram into a second cryptogram by using a cryptographic algorithm capable of calculating a Hamming distance in an encrypted state;

transmitting one or more cryptograms out of the first cryptogram and the second cryptogram to the calculation server; and

receiving a verification result from the authentication server,

the calculation server having

a memory; and

a second processor coupled to the memory, wherein the second processor executes a process including

receiving one or more cryptograms out of the first cryptogram and the second cryptogram from the information processing apparatus;

storing the first cryptogram as registration information in the memory;

calculating a Hamming distance between the first cryptogram stored in the memory and one or more cryptograms out of the first cryptogram and the second cryptogram that are received; and

transmitting the calculated Hamming distance to the authentication server, and

the authentication server having

a third processor that executes a process including

receiving the Hamming distance from the calculation server;

determining the Hamming distance to be authenticated as a verification result when the Hamming distance is less than a predetermined value and determines the Hamming distance not to be authenticated as a verification result when the Hamming distance is equal to or more than the predetermined value; and

transmitting the verification result to the information processing apparatus.

15. The information processing system according to claim 14 , wherein the calculating of the information processing apparatus calculating the first cryptogram based on an exclusive logical sum as the logical operation.