Phys. Rev. Lett. 89, 227901 (2002) [4 pages]Quantum Protocol for Cheat-Sensitive Weak Coin FlippingReceived 27 February 2002; published 6 November 2002 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/√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. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.227901
DOI:
10.1103/PhysRevLett.89.227901
PACS:
03.67.Dd
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