INFORMATION PROCESSING APPARATUS, INFORMATION PROCESSING SYSTEM, INFORMATION PROCESSING METHOD, AND PROGRAM

• US 20140331056A1
• Filed: 08/22/2013
• Published: 11/06/2014
• Est. Priority Date: 08/30/2012
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kawamoto, Yohei, Tanaka, Yu
• Granted Patent: US 9,882,721 B2
• Time in Patent Office: Days
• US Class Current: 713/176
• CPC Class Codes: H04L 9/30 Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
• CPC Class Codes: H04L 9/3093 involving Lattices or polynomial equations, e.g. NTRU scheme
• CPC Class Codes: H04L 9/3218 using proof of knowledge, e.g. Fiat-Shamir, GQ, Schnorr, ornon-interactive zero-knowledge proofs
• CPC Class Codes: H04L 9/3234 involving additional secure or trusted devices, e.g. TPM, smartcard, USB or software token network architectures or network communication protocols for supporting authentication of entities using an additional device in a packet data network H04L63/0853
• CPC Class Codes: H04L 9/3247 involving digital signatures

Abstract

An information processing system comprising interface circuitry configured to receive message-independent information, the message-independent information having been generated by another apparatus and transferred to the interface in advance of a digital signature being generated, send message-dependent information to an external device, and receive a digital signature from the external device; and processing circuitry configured to generate the message-dependent information from a message and at least a part of the message-independent information, and associate the digital signature with the message.

Claims

1. An information processing system comprising:

interface circuitry configured to

receive message-independent information, the message-independent information having been generated by another apparatus and transferred to the interface in advance of a digital signature being generated, send message-dependent information to an external device, and receive a digital signature from the external device; and

processing circuitry configured to

generate the message-dependent information from a message and at least a part of the message-independent information, and

associate the digital signature with the message.

2. The information processing system of claim 1, wherein:

the interface circuitry is configured to receive the message-independent information in at least one near field communication message.

3. The information processing system of claim 1, further comprising:

the external device,

wherein the external device is configured to delete information used to generate digital signatures after a predetermined number of uses.

4. The information processing system of claim 3, wherein:

the external device is configured to count a number of digital signature generation events and delete the information after the count reaches a predetermined threshold.

5. The information processing system of claim 1, wherein:

the interface circuitry receives from the external device information used in the generation of the digital signature.

6. The information processing system of claim 1, wherein:

the interface circuitry receives from the external device information extracted from the message-independent information and corresponds to the message-dependent information sent to the external device.

7. The information processing system of claim 1, further comprising:

another external device that generates a hash value used for digital signature generation and sends the hash value to at least one of the interface circuitry and the external device.

8. The information processing system of claim 1, further comprising:

the external device;

wherein the external device includes a secure area that only holds information regarding a secret key.

9. The information processing system of claim 1, wherein:

the interface circuitry receives from the external device a hash value relevant to signature generation so as to reduce communication volume between the external device and the interface circuitry.

10. The information processing system of claim 1, wherein:

the digital signature is compliant with an MQ protocol.

11. The information processing system of claim 1, wherein

the message-independent information is updated each time a different digital signature is generated.

12. The information processing system of claim 7, wherein

the another external device generates the hash value based on an ID number that is stored or transmitted to the another external device.

13. The information processing apparatus of claim 1, wherein:

the processing circuitry sends the message with the digital signature to a Verifier.

14. The information processing system of claim 1, wherein,

the external device being one of an IC card, a mobile phone, or a PDA.

15. An information processing method comprising:

receiving message-independent information, the message-independent information having been generated by another apparatus and transferred to the interface in advance of a digital signature being generated,

generating with processing circuitry message-dependent information from a message and at least a part of the message-independent information;

sending the message-dependent information to an external device;

receiving a digital signature from the external device;

and

associating with the processing circuitry the digital signature with the message.

16. A non-transitory computer-readable medium having a program stored therein that when executed by processing circuitry performs a method, the method comprising:

receiving from another apparatus message-independent information, the message-independent information having been generated by another apparatus and transferred to the interface in advance of a digital signature being generated,

generating with the processing circuitry message dependent information from a message and at least a part of the message-independent information;

sending the message-dependent information to an external device;

receiving a digital signature from the external device; and

associating with the processing circuitry the digital signature with the message.

17. An information processing apparatus comprising:

interface circuitry configured to

receive message-independent information, the message-independent information having been generated by another device and transferred to the interface circuitry in advance of a digital signature being generated, and

receive signature generation information from an external device; and

processing circuitry configured to

generate the digital signature from the message-independent information and the signature generation information.

18. The information processing apparatus of claim 17, wherein

the interface circuitry is configured to exchange information using near-field communications.

19. The information processing apparatus of claim 17, wherein

the processing circuitry is configured to delete information used to generate digital signatures after a predetermined number of uses.

20. The information processing apparatus of claim 19, wherein

the processing circuitry is configured to count a number of digital signature generation events and delete the information after the count reaches a predetermined threshold.

21. The information processing apparatus of claim 17, wherein

the interface circuitry sends to the external device information extracted from the message-independent information and corresponds to the message-dependent information received from the external device.

22. The information processing apparatus of claim 17, further comprising:

a non-transitory storage medium having a secure area that only holds information regarding a secret key.

23. The information processing apparatus of claim 17, wherein:

the interface circuitry sends to the external device hash values relevant to signature generation so as to reduce communication volume between the external device and the interface circuitry.

24. The information processing apparatus of claim 17, wherein:

the processing circuitry generates the digital signature to comply with a MQ protocol.

25. The information processing apparatus of claim 17, wherein:

the message-independent information is updated each time a different digital signature is generated.

26. The information processing apparatus of claim 17, wherein the information processing apparatus is one of an IC card, a mobile phone and a PDA.

27. An information processing method comprising:

receiving message-independent information from another device, the message-independent information having been generated and transferred in advance of a digital signature being generated;

receiving signature generation information from an external device; and

generating with processing circuitry the digital signature from the message-independent information and the signature generation information.

28. A non-transitory computer-readable medium having a program stored therein that when executed by processing circuitry performs a method, the method comprising:

receiving message-independent information from another device, the message-independent information having been generated and transferred in advance of a digital signature being generated;

receiving signature generation information from an external device; and

generating with processing circuitry the digital signature from the message-independent information and the signature generation information.