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To: jean who wrote (12830)	3/22/1999 7:02:00 PM
From: David	Read Replies (2) of 26039

Jean: No. The F3 public key system works something like this: The authorized user is authenticated at the desktop by the offline peripheral (the TSP device). The device sends a signal along with the request for information from the server. That signal and the request are so heavily encrypted the US government is worried about not being able to code-break (and the US government is the best code-breaker in the world). The server sends back the information, equally encrypted. Only the desktop user has been given the mathematical 'key' to decrypt it. The system is 'open', but only for that authorized transaction. Signals intercepted in flight cannot be decoded under present technology, and resending a signal would result in an invalidated authentication (everything gets time-stamped and the stamp is also encrypted). I worry more about a server-based 'template bank' that might attract on-line attacks. Those are IDT-type applications. However, whole networks might be put off-line for the most sensitive applications. F3 costs more, but I think you get more in high level security applications.

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