Abstract: Li-Yang’s sequence multi-signature scheme was relatively safe and effective，so it was used comprehensively.But this scheme was not safe enough because the scheme was very easy aggressed by the forgery attack and the two neighbour users could exchange digital signature.This paper shows a new sequence multi-signature with checking pubic key which can resist the forgery attack and the ally attack，compared with other schemes，its operation is more effective.

Key words: igital signature, multi-signature, public-key verification, forgery attack, confusion signature

摘要： Li-Yang提出的顺序多重签名方案由于执行效率高、实现相对简单、适应性强，因而有着广泛的应用。但是该方案容易受到伪造攻击与相邻成员的混乱签名，因此在安全性上有所欠缺。通过加入公钥验证机制，从而能够有效抵抗伪造攻击和联合攻击。并且该改进方案与其他方案相比，在安全性相当的情况下，运算效率更高。

关键词: 数字签名, 多重签名, 公钥检验, 伪造攻击, 混乱签名