Patent ID: 7100044
Filing Date: 2006-08-29
Classification: H04L

Abstract:
1. A public-key certificate using system for using a public key certificate which functions, in association with digital signature data of a certificate authority added thereto, as a certificate of a public key for encryption processing, said system comprising: an identification request device for generating a pair of the public key and a private key for a user who inputs sampling information that serves as person identification data of a person requesting the public key certificate, and sending the public key, the private key and the sampling information to a person identification certificate authority; the person identification certificate authority for executing a person authentication by comparing the sampling information against a template which serves as person identification data of the person requesting the public key certificate, the template being obtained from a person identification certificate possessed by said person identification certificate authority, generating a verification certificate based on an identifier of said requesting person when person authentication is established, updating information indicating a history of issuing verification certificates, and sending a user ID and the public key to a certificate authority; and the certificate authority for issuing the public key certificate for the requesting person corresponding to the received public key.