US Patent 7624433 Keyfob for use with multiple authentication entities

A token generator such as a keyfob is used to access the computer of an authentication entity different from the authentication entity that issued the token generator. The token generator stores authentication entity identification information identifying the authentication entity that issued the token generator. The token generator causes a user computer to transmit an authentication request including such authentication entity identification information together with a token generated in synchronization with the authentication entity issuing the token generator, so that the authentication request can be routed to the appropriate authentication entity that issued the keyfob for validation. The authentication request can be sent directly to the authentication entity that issued the token generator. The authentication request can also be sent to the authentication entity that issued the token generator via another authentication entity to which the user computer attempts to access.