期刊
MODERN PHYSICS LETTERS A
卷 34, 期 28, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217732319502298
关键词
Information security; quantum cryptography; secure multi-party quantum computation; quantum private comparison; maximally entangled seven-qubit state
资金
- State Key Program of National Natural Science of China [61332019]
- Major State Basic Research Development Program of China (973 Program) [2014CB340601]
- National Science Foundation of China [61202386, 61402339]
- National Cryptography Development Fund [MMJJ201701304]
Quantum private comparison (QPC), whose security is based on some laws of quantum mechanics (e.g. quantum noncloning theorem and Heisenbergs uncertainty principle), allows n(n >= 2) parties who do not trust each other to judge whether their secret data are the same while maintaining data privacy. In this paper, we investigate the utility of the maximally entangled seven-qubit state for QPC, and we propose a new protocol which enables two parties to compare their secret data with each other for equality without disclosing their secret data. In our protocol, single particle measurements and Bell-basis measurements are employed, both of which can be implemented with current technologies. In addition to quantum measurements, our protocol does not use other quantum technologies such as entanglement swapping and unitary operations. A semi-honest third-party who assists two parties in implementing the protocol is assumed in our protocol. Furthermore, we use the entanglement correlations of the maximally entangled seven-qubit state and collaborative computing between parties for privacy protection, and we use quantum key distribution (QKD) to ensure the security of the cooperative computing when two parties are in different locations. What is more, we show that the security towards both outsider and insider attacks can be guaranteed.
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