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Cryptographic Primitives Can Be Fragile
René Peralta
143 - 148
NATO Security through Science Series - D: Information and Communication Security
Volume 1: Verification of Infinite-State Systems with Applications to Security
Abstract

We show that two published coin-flipping protocols are breakable in the sense that one of the parties can pre-determine the result of the coin-flip. The way in which the protocols fail is illustrative of subtle ways in which a protocol designer may combine secure cryptographic primitives - such as one-way functions and encryption - in a way that produces an insecure cryptographic protocol.

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