重构者两粒子的量子秘密共享方案-《计算机技术与发展》

文章信息/Info

Author(s):: XIA Hong-hong; WANG Xue-ming; YANG Wan-xin; School of Computer Science and Technology,Guizhou University,Guiyang 550025,China

Keywords:: multi-party secret sharing; quantum entanglement; unitary operatuion; quantum teleportation; Bell-state measurement

摘要:: 量子密码体制使它在多方秘密共享方面有很好的运用和发展,关于量子秘密共享的文章大都只考虑了参与者只分配一个粒子的情况。文中充分考虑了秘密重构者持有两个粒子的情况,构建了一个新的量子秘密共享方案,该方案是完全通过隐形传态来实现秘密共享的。在以往的方案中,重构者往往需要完全借助其他参与者的测量结果恢复秘密,自己不参与其他参与者的测量过程,存在一定的风险性。此方案不需要完全依靠其他参与者幺正变换即可恢复秘密,重构者拥有两个粒子,其中一个用于 Bell 测量,另一个参与幺正变换,在其他代理相互合作情况的下,秘密量子态也不会轻易转移到其他粒子上去,减轻了一定程度上的欺骗。在整个过程中粒子无太大损耗,最后对该方案进行了安全性分析,结果表明该方案是安全可靠的。

Abstract:: Quantum cryptography makes it well used and developed in the aspect of multi-party secret sharing. Most articles about quantum secret sharing only consider the case that participants only allocate one particle. We give full considera-tion to the fact that the secret reconstructors hold two particles and construct a new quantum secret sharing scheme. In the previous schemes,the reconstructors often need to recover the secrets completely with the measurement results of other participants, and they do not participate in the measurement process of other participants, which has some risks. The proposed scheme does not need to depend entirely on other participants unitary transformation can restore the secret, refactoring has two particles, one is used for Bell, another to participate in the unitary transformation.Under the situation of other agents cooperation, secret quantum state will not be easily transferred to other particles, reducing the deception to some extent. In the whole process, there is no large loss of particles. Finally,the safety analysis shows that the proposed scheme is safe and reliable.