Chinese Journal of Quantum Electronics ›› 2021, Vol. 38 ›› Issue (4): 485-495.doi: 10.3969/j.issn.1007-5461.2021.04.011

• Quantum Optics • Previous Articles     Next Articles

Passive decoy-state quantum digital signature scheme based on linear optical components

FAN Yuteng1, SUO Lei1, ZHANG Chunhui1,2, CHEN Jiaming1,2, WANG Qin1,2∗   

  1. ( 1 Institute of Quantum Information Technology, College of Communication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China; 2 Key Laboratory of Broadband Wireless Communication and Sensor Network Technology, Ministry of Education, College of Communication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China )
  • Received:2020-06-01 Revised:2020-09-15 Published:2021-07-28 Online:2021-07-27

Abstract: To solve the problem of information leakage of pulse width and frequency possibly caused by pulse inten- sity modulation in current active decoy-state quantum digital signature scheme, a passive decoy-state quantum digital signature scheme based on linear optical components is proposed. In this scheme, decoy states are passively construct- ed to estimate channel parameters by making two weak coherent sources to pass a beam splitter and trigger the local detector, so that the research of quantum digital signature can be carried out. This passive decoy-state quantum digital signature scheme can not only avoid the side channel vulnerabilities caused by active pulse intensity modulation and improve the security of the system, but also weaken the effect of modulation error and intensity fluctuation generated in the preparation process of the active decoy-state scheme.

Key words: quantum information, passive quantum digital signature, passive decoy state, linear optical components

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