Efficient quantum private comparison protocol utilizing single photons and rotational encryption |
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| Affiliation: | 1.Information Security Center, State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China;2.Information Security Center, School of Cyberspace Security, Beijing University of Posts and Telecommunications, Beijing 100876, China |
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| Abstract: | As a branch of quantum secure multiparty computation, quantum private comparison is applied frequently in many fields, such as secret elections, private voting, and identification. A quantum private comparison protocol with higher efficiency and easier implementation is proposed in this paper. The private secrets are encoded as single polarized photons and then encrypted with a homomorphic rotational encryption method. Relying on this method and the circular transmission mode, we implement the multiplexing of photons, raising the efficiency of our protocol to 100%. Our protocol is easy to realize since only single photons, unitary operation, and single-particle measurement are introduced. Meanwhile, the analysis shows that our protocol is also correct and secure. |
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| Keywords: | quantum private comparison rotational encryption polarized single photons efficiency |
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