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QIS

Seminar

Cheat sensitive bit commitment

Hardy, L (Perimeter Institute)
Thursday 09 September 2004, 11:30-12:15

Seminar Room 2, Newton Institute Gatehouse

Abstract

We define cheat sensitive cryptographic protocols between mistrustful parties as protocols which guarantee that, if either cheats, the other has some nonzero probability of detecting the cheating. We give an example of an unconditionally secure cheat sensitive non-relativistic bit commitment protocol which uses quantum information to implement a task which is classically impossible.

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