Teleportation-based Continuous-Variable Quantum Digital Signature
RESULTS IN PHYSICS(2023)
摘要
In this paper, a continuous-variable quantum digital signature (CV-QDS) protocol based on quantum telepor-tation (QT) is proposed, and the corresponding theoretical analysis method is established. Unlike previous schemes, we use squeezed states to carry key and secret information about the teleported states that are transmitted through classical and entangled channels without infinite squeezing. In addition, for multibit information signatures, we propose to use the mean and modulation variance of the teleported quantum state to distinguish signatures, and each of which is marked and ordered. In particular, we derive the fidelity that the protocol can achieve, displaying the effectiveness of the method at different compression levels. Security analysis demonstrates that the protocol possesses unforgeability, non-repudiation and robustness, which is suitable for signing one-bit and multibit messages.
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关键词
Quantum teleportation,Continuous-variable,Quantum digital signature
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