一个证实门限数字签名方案的安全漏洞分析

证实数字签名协议是一种需要签名者、证实者和验证者三方参与的特殊的数字签名方案,除了签名者,其他任何人都不能以签名者的名义产生有效的证实签名;同样除了证实者,其他任何人也不能对签名的有效性作出判断。文献8]是一个新的证实门限数字签名协议,是秘密共享思想与证实数字签名方案的新结合,但提出的新方案并未满足证实数字签名协议的某些要求,因此存在着安全漏洞;本文对此进行了详尽的分析,指出了其设计不足之处,从而说明新协议并没有实现其预期设计目标。

Security flaws analysis of a confirmer threshold digital signature scheme

Confirmer digital signature protocol is a special digital signature scheme which needs the participation of signer,confirmer and verifier: Other people except signer can't do such conclusion.Document~(8]) is a new confirmer threshold digital signature protocol,which is a new combination of secret sharing thoughts and confirmer digital signature scheme.But the proposed new scheme didn't satisfy some demands of confirmer digital signature protocol,therefore security flaws do exist;specific analysis is shown in this paper,the shortage of design is pointed out,and demonstrates that the new protocol didn't realize the expected goal.