Authentication system, authentication request device, validating device and service medium
First Claim
1. An authentication system for use by an authenticator to authenticate legitimacy of an authentication requester in response to a request from the authentication requester, the authentication system comprising:
- encrypted-information preparing means for receiving fixed authentication-requesting information that is unique to the authentication requester, and variable information that has characteristics varying with respect to time, so as to prepare encrypted information based on the fixed authentication-requesting information and the variable information, and information decoding means for receiving fixed authenticating information corresponding to the fixed authentication-requesting information, and the encrypted information, so as to decode at least the fixed authentication-requesting information from the encrypted information.
1 Assignment
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Accused Products
Abstract
An authentication requester 11 uses property 13 thereof to request authentication. When an encryption key 41 for requesting authentication is input into the property 13, the encryption key 41 and a public key 42 (public information for encryption) are combined, such that encrypted information 46 is computed from biometrics information 44 and variable information 45 on varying location, time, etc. The encrypted information 46 is then transmitted as presented information 14 to a verification unit 16A. In the verification unit 16A, an encryption key 43 for authentication and the public key 42 (public information for decryption) are used to decode the encrypted information 46, and the decoded information is compared for a match. When a configuration in which the encryption key 41 merely passes through the property 13 and the verification unit 16A and does not remain as a default value, is adopted, the risk of theft of the encryption key 41 by a third party is reduced.
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Citations
22 Claims
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1. An authentication system for use by an authenticator to authenticate legitimacy of an authentication requester in response to a request from the authentication requester, the authentication system comprising:
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encrypted-information preparing means for receiving fixed authentication-requesting information that is unique to the authentication requester, and variable information that has characteristics varying with respect to time, so as to prepare encrypted information based on the fixed authentication-requesting information and the variable information, and information decoding means for receiving fixed authenticating information corresponding to the fixed authentication-requesting information, and the encrypted information, so as to decode at least the fixed authentication-requesting information from the encrypted information. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An authentication system for use by an authenticator to authenticate legitimacy of an authentication requester in response to a request from the authentication requester, the authentication system comprising:
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encrypted-information preparing means for receiving variable information that has characteristics varying at least with respect to time, so as to prepare encrypted information based on the variable information, and information decoding means for receiving fixed authenticating information corresponding to fixed authentication-requesting information, and the encrypted information, so as to decode at least the variable information from the encrypted information. - View Dependent Claims (9)
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10. An authentication request device in authentication system for use by an authenticator to authenticate legitimacy of an authentication requester in response to a request from the authentication requester, the authentication request device comprising:
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a variable-information input unit for receiving variable information that has characteristics varying with respect to time, and encrypted-information preparing means for receiving the variable information from the variable-information input unit, so as to prepare encrypted information based on the variable information. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A verification device in an authentication system for use by an authenticator to authenticate legitimacy of an authentication requester in response to a request from the authentication requester, the verification device comprising:
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an encrypted-information input unit for receiving encrypted information which is transmitted from the authentication requester, and which is prepared based on variable information and fixed authentication-requesting information that is unique to the authentication requester, a fixed-information input unit for inputting fixed authenticating information corresponding to the fixed authentication-requesting information, and information decoding means for receiving outputs from the encrypted-information input unit and the fixed-information input unit, so as to decode at least the fixed authentication-requesting information from the encrypted information. - View Dependent Claims (17, 18)
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19. A verification device in an authentication system for use by an authenticator to authenticate legitimacy of an authentication requester in response to a request from the authentication requester, the verification device comprising:
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an encrypted-information input unit for receiving encrypted information prepared based on variable information transmitted from the authentication requester, and information decoding means for receiving an output from the encrypted-information input unit, so as to decode at least the variable information from the encrypted information. - View Dependent Claims (20)
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21. A service medium in an authentication system for use by an authenticator to authenticate legitimacy of an authentication requester in response to a request from the authentication requester, the service medium comprising:
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a fixed-information input unit for receiving fixed authentication-requesting information that is unique to the authentication requester, a variable-information input unit for receiving variable information that has characteristics varying with respect to time, encrypted-information preparing means for receiving the fixed authentication-requesting information and the variable information, so as to prepare encrypted information based on the fixed authentication-requesting information and the variable information, information decoding means for receiving fixed authenticating information corresponding to the fixed authentication-requesting information, and an output from the encrypted-information preparing means, so as to decode at least the fixed authentication-requesting information from the encrypted information, a circuit for generating at least one of a sound signal and an image signal, and control means for receiving the decoded fixed authentication-requesting information to control, based on the fixed information, the circuit to be operational or non-operational.
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22. A service medium in an authentication system for use by an authenticator to authenticate legitimacy of an authentication requester in response to a request from the authentication requester, the service medium comprising:
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a variable-information input unit for receiving variable information that has characteristics varying with respect to time, encrypted-information preparing means for preparing encrypted information based on the variable information, information decoding means for receiving an output from the encrypted-information preparing means, so as to decode at least the variable information from the encrypted information, a circuit for generating at least one of a sound signal and an image signal, and control means for receiving the decoded variable information to control, based on the variable information, the circuit to be operational or non-operational.
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Specification