Cryptology ePrint Archive: Report 2020/1500

Oblivious Transfer is in MiniQCrypt

Alex B. Grilo and Huijia Lin and Fang Song and Vinod Vaikuntanathan

Abstract: MiniQCrypt is a world where quantum-secure one-way functions exist, and quantum communication is possible. We construct an oblivious transfer (OT) protocol in MiniQCrypt that achieves simulation-security in the plain model against malicious quantum polynomial-time adversaries, building on the foundational work of Bennett, Brassard, Crépeau and Skubiszewska (CRYPTO 1991). Combining the OT protocol with prior works, we obtain secure two-party and multi-party computation protocols also in MiniQCrypt. This is in contrast to the classical world, where it is widely believed that one-way functions alone do not give us OT.

In the common random string model, we achieve a constant-round universally composable (UC) OT protocol.

Category / Keywords: foundations / Quantum cryptography, oblivious transfer, extractable commitments

Date: received 30 Nov 2020

Contact author: abgrilo at gmail com

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Version: 20201202:100315 (All versions of this report)

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