A quantum deterministic key distribution protocol via GHZ states entanglement swapping

Abstract

Abstract: In order to improve the efficiency of deterministic key distribution, a quantum key distribution scheme based on GHZ states entanglement swapping is proposed. By sharing a pair of GHZ states between communicators, Bob could deduce deterministic key from classic information which is sand by Alice who takes entanglement and measurement operation. Compared with other scheme which also based on GHZ entanglement state, two GHZ states are produced by Bob in the proposed scheme and particles are distributed not by Alice, but Bob. Security analysis result show that any eavesdropper could be found in time. The proposed scheme has high distribution efficiency in that all the GHZ states can be used to transmit information except those chosen for checking eavesdroppers, it can reach the distribution efficiency at 60% and simple to operation.

Key words: quantum optics, quantum deterministic key distribution, distribution efficiency, entanglement swapping, GHZ state

CLC Number:

O431.2

Zhuansun Shaoshuai, Chen Hong, Cai Xiaoxia. A quantum deterministic key distribution protocol via GHZ states entanglement swapping[J]. J4, 2015, 32(1): 83-89.

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