摘要： 门限签名是一种特殊而重要的数字签名。但在现有的门限签名方案中，合谋攻击一直是一个难以解决的问题。该文对现有抗合谋攻击门限签名方案进行了安全性分析，指出该方案存在的缺陷，并基于现有的门限签名体制，对如何抵抗合谋攻击给出了一些启发式的思想和方法。

关键词: 密码学, 门限签名, 合谋攻击

Abstract: Threshold signature is a kind of special and important digital signature. But in the existing threshold signature scheme, conspiracy attack is still a problem which is difficult to solve. This paper analyzes a threshold signature scheme to withstand conspiracy attack, analyzes its weakness and proposes some heuristic idea and methods to withstand conspiracy attack based on the existing threshold signature schemes.

Key words: cryptography, threshold signature, conspiracy attack

中图分类号: 

• TP309