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Comment on quantum private comparison protocols with a semi-honest third party |
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| Authors: | Yu-Guang Yang Juan Xia Xin Jia Hua Zhang |
| Affiliation: | 1. College of Computer Science and Technology, Beijing University of Technology, Beijing, 100124, China 2. State Key Laboratory of Integrated Services Network, Xidian University, Xi’an, 710071, China 3. State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing, 100876, China |
| Abstract: | As an important branch of quantum cryptography, quantum private comparison (QPC) has recently received a lot of attention. In this paper we study the security of previous QPC protocols with a semi-honest third party (TP) from the viewpoint of secure multi-party computation and show that the assumption of a semi-honest TP is unreasonable. Without the unreasonable assumption of a semi-honest TP, one can easily find that the QPC protocol (Tseng et al. in Quantum Inf Process, 2011, doi:10.1007/s11128-011-0251-0) has an obvious security flaw. Some suggestions about the design of QPC protocols are also given. |
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