Patent ID: 7409553
Filing Date: 2008-08-05
Classification: G06Q,H04L

Abstract:
1. A method for generating a public key certificate of an end entity by a registration authority and an issuing authority in a public key infrastructure, comprising the steps of: generating, by the registration authority, a signature to contents to be registered with a public key certificate having its own valid term, and a certificate issuing request including both the contents signed by the registration authority and a signature to the contents signed by the registration authority; sending the certificate issuing request from the registration authority to the issuing authority; generating, in response to the certificate issuing request, by the issuing authority, a public key certificate including the contents signed by the registration authority, the signature to the contents signed by the registration authority, issuing contents to be issued by the issuing authority, and an issuing authority signature to the contents signed by the registration authority, the signature to the contents signed by the registration authority and the issuing contents issued by the issuing authority; sending the public key certificate from the issuing authority to the registration authority for being registered within the registration authority; deleting information, at the registration authority, on the public key certificate having been generated if the valid term has been ended; and deleting information, at the registration authority, on the public key certificate having been generated in response to a public key certificate invalidation request sent from the issuing authority.