(t,n)门限方案中一种防欺骗影子交换协议

A shadow-exchanged protocol of cheating prevention for the(t,n) threshold scheme

(t,n)门限方案是用于秘密共享的一种有效的方案,但该方案中参与者进行欺骗的问题还一直有待于解决,尤其是如何防止最后一个参与者进行欺骗。文章基于Shamir的(t,n)门限方案以及影子的真实性检测,提出了一种防欺骗影子交换协议用于参与者之间进行影子交换,成功的解决了最后一个参与者进行欺骗的问题。

The threshold scheme （t, n） is an effective scheme for secret sharing,but the problem of the participant＇s cheating in the scheme remains to be solved, especially how to prevent the last participant from cheating. In this paper, a shadow-exchanged protocol of cheating prevention is presented based on the Shamifs （t, n） threshold scheme and the shadows detection, and the problem of the last participant＇s cheating is successfully solved.