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Barrington Plays Cards: The Complexity of Card-based Protocols (2010.08445v1)
Published 16 Oct 2020 in cs.CC
Abstract: In this paper we study the computational complexity of functions that have efficient card-based protocols. Card-based protocols were proposed by den Boer [EUROCRYPT '89] as a means for secure two-party computation. Our contribution is two-fold: We classify a large class of protocols with respect to the computational complexity of functions they compute, and we propose other encodings of inputs which require fewer cards than the usual 2-card representation.