中文摘要：

门限签名是一种特殊而重要的数字签名，但是一般的门限群签名方案不能抗合谋攻击，事后发生纠纷时不能追查身份．文章提出一个基于椭圆曲线的门限签名方案，解决了抗合谋攻击和身份追查问题．

英文摘要：

Threshold signature is a special and important digital signature, but general threshold signature schemes are difficult to resist conspiracy attacks and can not find out the identities after the disputes. This paper proposed a threshold signature scheme based on elliptic curve, which solved the problems of resisting conspiracy attacks and tracing identities.