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- W4287253477 abstract "We study uncloneable quantum encryption schemes for classical messages as recently proposed by Broadbent and Lord. We focus on the information-theoretic setting and give several limitations on the structure and security of these schemes: Concretely, 1) We give an explicit cloning-indistinguishable attack that succeeds with probability $frac12 + mu/16$ where $mu$ is related to the largest eigenvalue of the resulting quantum ciphertexts. 2) For a uniform message distribution, we partially characterize the scheme with the minimal success probability for cloning attacks. 3) Under natural symmetry conditions, we prove that the rank of the ciphertext density operators has to grow at least logarithmically in the number of messages to ensure uncloneable security. 4) The emph{simultaneous} one-way-to-hiding (O2H) lemma is an important technique in recent works on uncloneable encryption and quantum copy protection. We give an explicit example which shatters the hope of reducing the multiplicative security loss constant in this lemma to below 9/8." @default.
- W4287253477 created "2022-07-25" @default.
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- W4287253477 date "2021-03-26" @default.
- W4287253477 modified "2023-09-24" @default.
- W4287253477 title "Limitations on Uncloneable Encryption and Simultaneous One-Way-to-Hiding" @default.
- W4287253477 doi "https://doi.org/10.48550/arxiv.2103.14510" @default.
- W4287253477 hasPublicationYear "2021" @default.
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