对一种代理多重签名的安全分析

Security argument of a proxy multi-signature scheme

Zhou等人提出一种强代理多重签名方案,并声称该方案具有强不可伪造性和不可否认性.通过对Zhou的方案进行安全分析,指出该方案具有伪造性和否认性,并给出相应的攻击方法.通过对签名中R表示形式的限定给出两种改进方法来阻止相应的攻击.

Zhou et al proposed a proxy multi-signature scheme and claimed that the scheme was non-deniable and unforgeable. Unfortunately, in this work, security analysis was given to the scheme and results showed that the scheme was forgeable and repudiative. Finally, the investigator gave the corresponding attacks to the scheme and two corresponding improved methods to the original scheme to overcome the attacks by fixing R representation format.