Welcome to the resource topic for 2022/034
Title:
From Privacy-Only to Simulatable OT: Black-Box, Round-Optimal, Information-theoretic
Authors: Varun Madathil, Chris Orsini, Alessandra Scafuro, and Daniele Venturi
Abstract:We present an information-theoretic transformation from any 2-round OT protocol with only game-based security in the presence of malicious adversaries into a 4-round (which is known to be optimal) OT protocol with simulation-based security in the presence of malicious adversaries. Our transform is the first satisfying all of the following properties at the same time: – It is in the plain model, without requiring any setup assumption. – It only makes black-box usage of the underlying OT protocol. – It is information-theoretic, as it does not require any further cryptographic assumption (besides the existence of the underlying OT protocol). Additionally, our transform yields a cubic improvement in communication complexity over the best previously known transformation.
ePrint: https://eprint.iacr.org/2022/034
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