Patent ID: 7325132
Filing Date: 2008-01-29
Classification: G06Q

Abstract:
1. An authentication method wherein: a user owns an electronic value including encrypted value authentication information (F(VPW)) wherein authentication information (VPW) corresponding to said electronic value specified by said user is encoded by a first irreversible calculation process (F), in a process for authenticating said user as the right owner of said electronic value, an authentication side generates a random number (R) and transmits it to said user side, said user side generates value authentication information (F(VPW′)) from said authentication information (VPW) corresponding to said electronic value input by said user, further generates authentication information (G(R,F(VPW′))) wherein said random number (R) and said value authentication information (F(VPW′)) are concatenated and encoded by a second irreversible calculation process (G) and transmits said electronic value and said authentication information (G(R,F(VPW′))) to said authentication side, said authentication side decrypts code of said received electronic value, extracts said value authentication information (F(VPW)) from said electronic value, generates authentication information (G(R,F(VPW))) wherein said random number (R) and said value authentication information (F(VPW)) are concatenated and encoded by said second irreversible calculation process (G), collates said received authentication information (G(R,F(VPW′))) with said generated authentication information (G(R,F(VPW))), verifies that they are identical, and authenticates user.