基于Williams体制的门限签名方案

Threshold Group Signature Scheme Based on Williams Scheme

门限签名的一个重要安全隐患就是伪造,即一个授权子集可以冒充其他授权子集进行签名。基于W il-liams体制提出了一个能防止伪造、简洁的门限签名方案。该方案不需要安全传输信道,能同时具备匿名性和可追查性,还具有公开的信息量少、效率高等特点。

A very dangerous problem to a threshold group signature is forgeability, i, e, an authorized subset can impersonate another authorized subset to generate signature. A new threshold group signature based on Williams scheme is proposed in this paper, which is brief and nonforgeability. The scheme can possess anonymity and traceability at the same time. In this scheme, the secret transmission channel is not necessary and only a few parameters should be public. So it is efficient.