Journal
QUANTUM INFORMATION PROCESSING
Volume 13, Issue 10, Pages 2343-2352Publisher
SPRINGER
DOI: 10.1007/s11128-014-0805-z
Keywords
Quantum cryptography; Private comparison; Entangled state
Funding
- National Natural Science Foundation of China [61272175]
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In this paper, a novel quantum private comparison protocol with -party and -dimensional entangled states is proposed. In the protocol, participants can sort their secret inputs in size, with the help of a semi-honest third party. However, if every participant wants to know the relation of size among the secret inputs, these two-participant protocols have to be executed repeatedly times. Consequently, the proposed protocol needs to be executed one time. Without performing unitary operation on particles, it only need to prepare the initial entanglement states and only need to measure single particles. It is shown that the participants will not leak their private information by security analysis.
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