Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2008, Vol. 31 ›› Issue (1): 9-13.doi: 10.13190/jbupt.200801.9.066

• Papers • Previous Articles     Next Articles

利用GHZ态实现可控的量子秘密共享

SUN Ying1, QIN Su-juan1, WEN Qiao-yan1, ZHU Fu-chen2   

  1. 1. School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China;
    2. National Laboratory for Modern Communications, P.O.Box 810, Chengdu 610041, China
  • Received:2007-02-04 Revised:1900-01-01 Online:2008-02-28 Published:2008-02-28
  • Contact: SUN Ying

Abstract:

Based on Greenberger-Horne-Zeilinger(GHZ) state, a controllable quantum secret sharing scheme was proposed. In this scheme, the quantum correlations among the three particles in a GHZ state and the characteristics of the Hadamard gate were exploited sufficiently. Bob and Charlie could obtain the joint key by sharing GHZ states. The Hadamard gate ensured the protocol controllable and secure. One GHZ state could be used to share three bits of message on average. Because all the quantum states are transmitted unidirectionally, and all particles except for the checking ones are used to transmit the joint key, this protocol has the advantage of high intrinsic efficiency, which approaches to 100% in theory.

Key words: quantum cryptography, quantum secret sharing, Greenberger-Horne-Zeilinger State, Hadamard gate

CLC Number: