中文摘要：

聚合签名方案可将n个签名者对n个不同消息的n个签名聚合成一个签名,验证者只需验证聚合签名结果即可确认这n个签名的有效性.对已有的三个聚合签名方案进行安全性分析,给出了对这三个方案的攻击方法,说明它们无法满足不可伪造性的安全要求.

英文摘要：

An aggregate signature scheme could aggregate n signatures on n distinct messages from n signers into a single one,the aggregate signature will convince the verifier that the n signatures are validity.To analyse the security of three aggregate signatures,and present attack methods on the three schemes,which shows that these schemes could not satisfy the requirement of unforgeability.