A Simple Construction of Quantum Public-Key Encryption from Quantum-Secure One-Way Functions

• URL: http://arxiv.org/abs/2303.01143v1
• Date: Thu, 2 Mar 2023 10:45:16 GMT
• Title: A Simple Construction of Quantum Public-Key Encryption from Quantum-Secure One-Way Functions
• Authors: Khashayar Barooti and Giulio Malavolta and Michael Walter
• Abstract summary: We show that quantum PKE can be constructed from any quantum-secure one-way function. Our construction is simple, uses only classical ciphertexts, and satisfies the strong notion of CCA security.
• Score: 13.677574076242188
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum public-key encryption [Gottesman; Kawachi et al., Eurocrypt'05] generalizes public-key encryption (PKE) by allowing the public keys to be quantum states. Prior work indicated that quantum PKE can be constructed from assumptions that are potentially weaker than those needed to realize its classical counterpart. In this work, we show that quantum PKE can be constructed from any quantum-secure one-way function. In contrast, classical PKE is believed to require more structured assumptions. Our construction is simple, uses only classical ciphertexts, and satisfies the strong notion of CCA security.

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