[Resource Topic] 2015/218: Efficient k-out-of-n oblivious transfer protocol

Welcome to the resource topic for 2015/218

Title:
Efficient k-out-of-n oblivious transfer protocol

Authors: wang qinglong

Abstract:

A new k-out-of-n oblivious transfer protocol is presented in this paper. The communication cost of our scheme are n+1 messages of sender to receiver and k messages from the receiver to sender. To the best knowledge of the authors, the com-munication complexity of our scheme is the least. Also, our scheme has a lower computation cost with (k+1)n modular ex-ponentiations for sender and 3k modular exponentiations for the receiver. The security of our scheme is only based on the Decision Diffie-Hellman assumption. Further, we proved the sender’s computational security and the receiver’s uncondition-al security under standard model.

ePrint: https://eprint.iacr.org/2015/218

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