一种新的基于Meta-ElGamal的多重签名方案

提出了一种新的基于Meta—ElGamal的多重签名方案，该方案改进了基于Meta—ElGamal方案的多重签名方案中的密钥生成部分和签名生成部分，既弥补了原方案中存在的多个签名者如果生成自己的密钥时相互合作就能达到日后否认消息签名的漏洞，又避免了单个成员控制群体私钥，从而能以群体的名义伪造对任何消息多重签名的攻击。

A New Multisignature Scheme Based on Meta-EIGamal

There are two attacks on Meta-ElGamal multisignature.In one attack,the attackers can deny that they have taken part in process of signing some messages with others,in the other attack,a single malicious group member can control the group secret key,and hence he can generate valid multisignature for any message on the behalf of the whole group without the help of other members.In this paper,the modifications are made for the key generation and signature generation of the scheme,which can efficiently avoid the two attacks.