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24 April 2024

» arxiv » 1703.1021

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Experimental measurement-device-independent quantum digital signatures over a metropolitan network
Hua-Lei Yin ; Wei-Long Wang ; Yan-Lin Tang ; Qi Zhao ; Hui Liu ; Xiang-Xiang Sun ; Wei-Jun Zhang ; Hao Li ; Ittoop Vergheese Puthoor ; Li-Xing You ; Erika Andersson ; Zhen Wang ; Yang Liu ; Xiao Jiang ; Xiongfeng Ma ; Qiang Zhang ; Marcos Curty ; Teng-Yun Chen ; Jian-Wei Pan ;
Date:	3 Mar 2017
Abstract:	Quantum digital signatures (QDS) provide a means for signing electronic communications with informationtheoretic security. However, all previous demonstrations of quantum digital signatures assume trusted measurement devices. This renders them vulnerable against detector side-channel attacks, just like quantum key distribution. Here, we exploit a measurement-device-independent (MDI) quantum network, over a 200-square-kilometer metropolitan area, to perform a field test of a three-party measurement-device-independent quantum digital signature (MDI-QDS) scheme that is secure against any detector side-channel attack. In so doing, we are able to successfully sign a binary message with a security level of about 1E-7. Remarkably, our work demonstrates the feasibility of MDI-QDS for practical applications.
Source:	arXiv, 1703.1021
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