A quantum protocol for cheat-sensitive weak coin flipping

Details A quantum protocol for cheat-sensitive weak coin flipping A quantum protocol for cheat-sensitive weak coin flipping

2002-02-21

arxiv.org/abs/quant-ph/0202118v2

Phys. Rev. Lett. vol 89, 227901 (2002)

Physics

Quantum Physics

4 pages RevTex. Differs from the journal version only in that the sentences: "The ordering of the authors on this paper was ch

Scientific paper

10.1103/PhysRevLett.89.227901

We present a quantum protocol for the task of weak coin flipping. We find that, for one choice of parameters in the protocol, the maximum probability of a dishonest party winning the coin flip if the other party is honest is 1/sqrt(2). We also show that if parties restrict themselves to strategies wherein they cannot be caught cheating, their maximum probability of winning can be even smaller. As such, the protocol offers additional security in the form of cheat sensitivity.

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