Patent ID: 8516265
Filing Date: 2013-08-20
Classification: G06F,H04L

Abstract:
1. An authentication method of performing authentication for an information processing device connected via a communication network by an authentication device, comprising: receiving information related to biometric authentication concerning the information processing device; receiving information related to identification information for identifying the information processing device; receiving information related to environment of the information processing device; receiving an electronic signature by a secret key which is paired with an electronic certification transmitted from the information processing device; determining, by a control unit, a biometric level based on the received information related to biometric authentication, a device level based on the received information related to identification information and an environment level based on the received information related to environment; correcting, by said control unit, the determined biometric level, device level and environment level to be a higher level, when the electronic signature is valid; and judging as positive, by said control unit, based on a reference level stored in advance and a level determined by all of the corrected biometric level, device level and environment level, when the electronic signature is valid; and judging as positive, by the control unit, without altering a level determined by all of the biometric level, device level and environment level, respectively before amendment, and the reference level stored in advance, when the electronic signature is not valid, wherein said correcting unit includes a first reception judging unit judging whether or not an electronic signature is received by said electronic signature receiving unit, a second reception judging unit judging, when said first reception judging unit judges that the electronic signature is received, whether or not information related to biometric authentication, information related to identification information and information related to environment encrypted by an encryption key arranged in advance between said information processing device and the authentication device by said biometric receiving unit, said device receiving unit and said environment receiving unit together with the reception of the electronic signature, a decrypting unit decrypting, when said second reception judging unit judges that said encrypted information related to biometric authentication, information related to identification information and information related to environment are received together with the electronic signature, said encrypted information related to biometric authentication, information related to identification information and information related to environment using said encryption key, an examining unit examining whether or not the information related to biometric authentication, information related to identification information and information related to environment decrypted by said decrypting unit have been altered, and a level correcting unit correcting, when said examining unit judges that no alteration has been made, the biometric level, device level and environment level, determined by said level determining unit, to be higher levels.