| 摘要 |
A dual layer authentication system is disclosed for securing user access to remote systems having verification units coupled to a user authentication system that generates authentication-PINs for subsequent use in logging on to remote systems. An access control system is coupled to the user authentication system and receives login requests from remote systems including the authentication-PINs issued by the user authentication system. The access control system approves access to remote systems if the authentication-PIN is verified. Preferably, the authentication-PINs are configured to be temporary. In addition, verification data can be stored on a smart card, and this verification data is verified by the verification unit with the minimal information having to be transmitted through the communications network between the verification unit and the user authentication system.
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