Patent ID: 8230483

Claim:
An authentication system comprising: a plurality of authentication entity devices which separately execute authentication subprocesses, the authentication subprocess constituting an authentication process; and a verification device which verifies the authentication process executed by the each authentication entity device, wherein the each authentication entity device comprising: a confidential information memory module configured to store confidential information for verification by the verification device; an authenticator generating module configured to generate an authenticator corresponding to executed contents of the authentication subprocess, the authenticator being generated using the confidential information; a specific context generating module configured to generate a specific context pursuant to a specific format from the authenticator and the executed contents; and a specific context output module configured to output the specific context, and the verification device comprises: a communication module which is provided with a function of conducting communication with an external device; and a context verifying module configured to verify a context from among a plurality of contexts, the plurality of contexts being generated by the plurality of authentication entity devices and received by the communication module.