关键词: 数字签名, 多重签名, 公钥检验, 伪造攻击, 混乱签名

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