一种改进的代理多重盲签名方案

Improved proxy blind multi-signature scheme

通过对Lu等的代理多重盲签名方案进行分析,指出该方案不能抵抗原始签名人的伪造攻击,且签名可被追踪等不足之处。提出了一种改进方案,该方案在面对原始签名人的伪造攻击时,其安全性等价于解离散对数难题。同时,在签名提取阶段引入签名接收者的私钥,代理签名人无法将盲消息的签名和消息签名联系起来,使得签名不可被追踪。

The security of the proxy blind multi-signature scheme which is proposed Lu et al is analyzed,and it is found that this scheme can＇t satisfy the properties of unforgeability and unlinkbility.This paper presents an improved scheme which can be against the original singer＇s universal forgery attack.The receiver＇s private key is introduced in the extraction phase of the improved scheme,because the proxy signer can not make a linkage between the signature on message and the signature on corresponding blind message.Consequently,the improved scheme also has the property of unlinkbility.