Efficient quantum private comparison protocol based on one direction discrete quantum walks on the circle |
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| Institution: | 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: | We propose an efficient quantum private comparison protocol firstly based on one direction quantum walks. With the help of one direction quantum walk, we develop a novel method that allows the semi-honest third party to set a flag to judge the comparing result, which improves the qubit efficiency and the maximum quantity of the participants' secret messages. Besides, our protocol can judge the size of the secret messages, not only equality. Furthermore, the quantum walks particle is disentangled in the initial state. It only requires a quantum walks operator to move, making our proposed protocol easy to implement and reducing the quantum resources. Through security analysis, we prove that our protocol can withstand well-known attacks and brute-force attacks. Analyses also reveal that our protocol is correct and practical. |
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| Keywords: | quantum private comparison protocol one direction quantum walks efficiency brute-force attack |
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