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USENIX Technical Program - Abstract - Smartcard 99

Authenticating Secure Tokens Using Slow Memory Access

John Kelsey and Bruce Schneier, Counterpane Systems


We present an authentication protocol that allows a token, such as a smart card, to authenticate itself to a back-end trusted computer system through an untrusted reader. This protocol relies on the fact that the token will only respond to queries slowly, and that the token owner will not sit patiently while the reader seems not to be working. This protocol can be used alone, with "dumb" memory tokens or with processor-based tokens.
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Last changed: 13 Mar 2002 ml
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