Unconditionally Secure Rational Secret Sharing in Standard Communication Networks

Rational secret sharing protocols in both the two-party and multi-party settings are proposed. These protocols are built in standard communication networks and with unconditional security. Namely, the protocols run over standard point-to-point networks without requiring physical assumptions or simultaneous channels, and even a computationally unbounded player cannot gain more than ? by deviating from the protocol. More precisely, for the 2-out-of-2 protocol the ? is a negligible function in the size of the secret, which is caused by the information-theoretic MACs used for authentication.

Provided by: Chinese Academy of Sciences Topic: Security Date Added: Nov 2010 Format: PDF

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