| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a device for anonymous authentication which allow an authenticating person and an authenticated person to control the frequency of authentication respectively and enables the authenticating person to authenticate the authenticated person with an anonym and to obtain the real name. SOLUTION: The authenticated person requests on anonym registering device 7 to issue a certificate and the anonym registering device generates ciphered signature data C by PkUA, EL, Rc, Wc, and IdI as SkI to generate and issue a certificate L to the authenticated person. The authenticated person requests authentication by the authenticating person who verifies a signature by C as PkI to confirm that PkUA, L, Rc, Wc, and IDI match and also confirm that Wr be more frequent than a specified frequency, verifies a signature by PkUA as Cert to confirm L and Wr matching each other, and sends L to the anonym registering device. The anonym registering device extracts K from PkUA and sends it to a real time registering device, which extracts the real name IdUA from K and informs the authenticating person of it.
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