Asynchronous measurement-device-independent quantum digital signatures
- URL: http://arxiv.org/abs/2407.08131v1
- Date: Thu, 11 Jul 2024 02:09:55 GMT
- Title: Asynchronous measurement-device-independent quantum digital signatures
- Authors: Jing-Wei Bian, Bing-Hong Li, Yuan-Mei Xie, Hua-Lei Yin, Zeng-Bing Chen,
- Abstract summary: Quantum digital signatures (QDSs) distribute and measure quantum states by key generation protocols and then sign messages via classical data processing.
Here, we propose an asynchronous measurement-device-independent (MDI) QDS protocol with asynchronous two-photon interference strategy and one-time universal hashing method.
Our findings present an efficient and practical MDI-QDS scheme, paving the way for large-scale data processing with non-repudiation in quantum networks.
- Score: 0.9786690381850356
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Quantum digital signatures (QDSs), which distribute and measure quantum states by key generation protocols and then sign messages via classical data processing, are a key area of interest in quantum cryptography. However, the practical implementation of a QDS network has many challenges, including complex interference technical requirements, linear channel loss of quantum state transmission, and potential side-channel attacks on detectors. Here, we propose an asynchronous measurement-device-independent (MDI) QDS protocol with asynchronous two-photon interference strategy and one-time universal hashing method. The two-photon interference approach protects our protocol against all detector side-channel attacks and relaxes the difficulty of experiment implementation, while the asynchronous strategy effectively reduces the equivalent channel loss to its square root. Compared to previous MDI-QDS schemes, our protocol shows several orders of magnitude performance improvements and doubling of transmission distance when processing multi-bit messages. Our findings present an efficient and practical MDI-QDS scheme, paving the way for large-scale data processing with non-repudiation in quantum networks.
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