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

Research output: Contribution to journalArticlepeer-review

54 Citations (Scopus)
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Quantum digital signatures (QDSs) provide a means for signing electronic communications with information-theoretic 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 metropolitan area, to perform a field test of a three-party 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 10-7. Remarkably, our work demonstrates the feasibility of MDI QDSs for practical applications.

Original languageEnglish
Article number042338
Number of pages10
JournalPhysical Review A
Issue number4
Publication statusPublished - 25 Apr 2017

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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