Patent ID: 7694330
Filing Date: 2010-04-06
Classification: G07C,H04L

Abstract:
1. A personal authentication device (PAD) comprising: at least one storage medium storing at least one CA public key, each public key associated with a certificate authority (CA); one or more input means for receiving one or more digital certificates, wherein the one or more digital certificates comprise at least one ticket-generation certificate including at least one service key generating program or information indicating at least one service key generating program; a processing component for authenticating the one or more received digital certificates using the at least one stored CA public key, and generating at least one service key based on the one or more authenticated digital certificates; and an output means for outputting the at least one service key, wherein the at least one storage medium comprises at least one component for storing a PAD private key associated with the PAD and used by the PAD to authenticate the PAD to a user, and wherein the one or more input means comprises at least one component for receiving a PAD authentication request from the user; the processing component comprises at least one component for responding to the PAD authentication request using the stored PAD private key; and the output means comprises at least one component for outputting responses to the PAD authentication request.