Multi-party Quantum Key Agreement without Entanglement

作者：Cai, Bin-Bin; Guo, Gong-De; Lin, Song^*

来源：International Journal of Theoretical Physics, 2017, 56(4): 1039-1051.

DOI：10.1007/s10773-016-3246-x

• Quantum key agreement
• Quantum cryptography
• Single particles

A new efficient quantum key agreement protocol without entanglement is proposed. In this protocol, each user encodes his secret key into the traveling particles by performing one of four rotation operations that one cannot perfectly distinguish. In the end, all users can simultaneously obtain the final shared key. The security of the presented protocol against some common attacks is discussed. It is shown that this protocol can effectively protect the privacy of each user and satisfy the requirement of fairness in theory. Moreover, the quantum carriers and the encoding operations used in the protocol can be achieved in realistic physical devices. Therefore, the presented protocol is feasible with current technology.

• 出版日期2017-4
• 单位福建师范大学