Encryption with Quantum Public Keys

• URL: http://arxiv.org/abs/2303.05368v3
• Date: Wed, 21 Jun 2023 11:28:01 GMT
• Title: Encryption with Quantum Public Keys
• Authors: Alex B. Grilo, Or Sattath, Quoc-Huy Vu
• Abstract summary: We study the question of building quantum public-key encryption schemes from one-way functions and even weaker assumptions. We propose three schemes for quantum public-key encryption from one-way functions, pseudorandom function-like states with proof of deletion and pseudorandom function-like states, respectively.
• Score: 1.7725414095035827
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: It is an important question to find constructions of quantum cryptographic protocols which rely on weaker computational assumptions than classical protocols. Recently, it has been shown that oblivious transfer and multi-party computation can be constructed from one-way functions, whereas this is impossible in the classical setting in a black-box way. In this work, we study the question of building quantum public-key encryption schemes from one-way functions and even weaker assumptions. Firstly, we revisit the definition of IND-CPA security to this setting. Then, we propose three schemes for quantum public-key encryption from one-way functions, pseudorandom function-like states with proof of deletion and pseudorandom function-like states, respectively.

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