Encrypting apparatus and encrypting method

• US 20060233357A1
• Filed: 12/22/2004
• Published: 10/19/2006
• Est. Priority Date: 02/24/2004
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Sato, Hideo
• Granted Patent: US 7,894,600 B2
• Time in Patent Office: Days
• US Class Current: 380/28
• CPC Class Codes: G06F 18/00 Pattern recognition
• CPC Class Codes: G06F 21/32 using biometric data, e.g. fingerprints, iris scans or voiceprints
• CPC Class Codes: G06F 21/606 by securing the transmission between two devices or processes
• CPC Class Codes: G06F 21/72 in cryptographic circuits
• CPC Class Codes: G06F 2221/2107 File encryption
• CPC Class Codes: G06V 40/14 Vascular patterns
• CPC Class Codes: H04L 2209/80 Wireless network architectures or network communication protocols for wireless network security H04W12/00
• CPC Class Codes: H04L 9/0891 Revocation or update of secret information, e.g. encryption key update or rekeying
• CPC Class Codes: H04L 9/3231 Biological data, e.g. fingerprint, voice or retina network architectures or network communication protocols for supporting authentication of entities using biometrical features in a packet data network H04L63/0861

Abstract

To propose an encryption device and encryption method capable of improving reliability of an encryption function. An element-specific parameter unique to a solid imaging element is created based on a uniform image signal S2 output from the solid imaging element as a result of imaging a uniform imaging target with the imaging unit 11, and identification information D1 is encrypted with encryption key information D2 extracted from this element-specific parameter, thereby being capable of ensuring confidentiality of the identification-information D1 and thus improving reliability of an encryption function.

Claims

1. An encryption device for encrypting information on a confidential target, comprising:

creation means for creating a unique parameter of an element group based on a signal output from the element group internally having a plurality of elements as a unit; and

encryption means for encrypting the information by using the unique parameter created by the creation means.

2. The encryption device according to claim 1, wherein

the creation means comprises storage means for storing a plurality of different evaluation patterns, and creates a combination of correlation values between the signal and the evaluation patterns being stored in the storage means, as the unique parameter.

3. The encryption device according to claim 2, comprising

communication means for communicating with a prescribed communication party, wherein

the creation means selects evaluation patterns requested by the communication party, from the evaluation patterns being stored in the storage means, and creates a combination of correlation values between the signal and the evaluation patterns selected, as the unique parameter.

4. The encryption device according to claim 1, comprising

solid imaging element for imaging a prescribed imaging target, wherein

the creation means creates the unique parameter of the solid imaging element based on a signal output from the solid imaging element as a result of imaging the uniform imaging target.

5. The encryption device according to claim 1, comprising

a solid imaging element for imaging a prescribed imaging target, wherein:

the creation means comprises;

parameter creation means for creating the unique parameter of the solid imaging element based on a signal output from the solid imaging element as a result of imaging. the uniform imaging target; and

body information creation means for creating body information unique to a body based on a signal output from the solid imaging element as a result of imaging a surface of the body or an inside of the body; and

the encryption means encrypts the body information created by the body information creation means by using the unique parameter created by the parameter creation means.

6. An encryption method for encrypting information on a confidential target, comprising:

a first step of creating a unique parameter of an element group based on a signal output from the element group internally having a plurality of elements as a unit; and

a second step of encrypting the information by using the unique parameter created.

7. The encryption method according to claim 6, wherein

the first step creates a combination of correlation values between the signal and a plurality of different evaluation patterns, as the unique parameter.

8. The encryption method according to claim 7, wherein,

the first step selects evaluation patterns meeting to a request made from a prescribed communication party, from the evaluation patterns and creates a combination of correlation values between the signal and the evaluation patterns selected as the unique parameter.

9. The encryption method according to claim 6, wherein

the first step creates the unique. parameter of the solid imaging element based on a signal output from the solid imaging element as a result of imaging a uniform imaging target.

10. The encryption method according to claim 6, wherein:

the first step comprises;

a parameter creation step of creating the unique parameter of a solid imaging element based on a signal output from the solid imaging element as a result of imaging a uniform imaging target; and

a body information creation step of creating body information unique to the body based on a signal output from the solid imaging element as a result of imaging a surface of the body or an inside of the body; and

the second step encrypts the body information by using the unique parameter.