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Published in:
2012 | OriginalPaper | Chapter
The Five-Card Trick Can Be Done with Four Cards
Authors : Takaaki Mizuki, Michihito Kumamoto, Hideaki Sone
Published in: Advances in Cryptology – ASIACRYPT 2012
Publisher: Springer Berlin Heidelberg
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The “five-card trick” invented by Boer allows Alice and Bob to securely compute the AND function of their secret inputs using five cards—three black cards and two red cards—with identical backs. This paper shows that such a secure computation can be done with only four cards. Specifically, we give a protocol to achieve a secure computation of AND using only four cards—two black and two red. Our protocol is optimal in the sense that the number of required cards is minimum.