ENCRYPTION ATTRIBUTE CERTIFICATE ISSUING METHOD, ATTRIBUTE VERIFICATION METHOD, ATTRIBUTE VERIFICATION SUPPORT METHOD, ATTRIBUTE AUTHENTICATION DEVICE, ATTRIBUTE VERIFICATION DEVICE, ATTRIBUTE VERIFICATION SUPPORT DEVICE, ENCRYPTION ATTRIBUTE CERTIFICATE ISSUING PROGRAM, ATTRIBUTE VERIFICATION PROGRAM, AND ATTRIBUTE VERIFICATION SUPPORT PROGRAM

摘要

PROBLEM TO BE SOLVED: To cope with the situation when there are many attribute verifiers and the attribute verifiers can not be individually specified in issuing an attribute certificate.;SOLUTION: An attribute authentication station issues an encryption attribute certificate on which the encryption attribute information of an attribute possessor generated with a public key of an attribute decryption organization, the attribute information of the verifier, and the public key of the attribute decryption organization are put. An attribute verification device authenticates the attribute decryption organization by using the public key of the attribute decryption organization to be put on the encryption attribute certificate, and requests the disclosure of the encryption attribute information by designating the verifier attribute certificate and the encryption attribute certificate. The attribute decryption organization authenticates the attribute verifier by using the two certificates, decrypts the encryption attribute information to be put on the encryption attribute certificate by using a secret key of its own device, and replies to the attribute verification device after re-encrypting by using the public key of the attribute verifier. The attribute verification device acquires the attribute information of the attribute possessor by decrypting the re-encryption information by using the secret key of its own device.;COPYRIGHT: (C)2006,JPO&NCIPI