Importance

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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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First Claim