Nyberg-Rueppel签名的部分盲化

Partial blind signatures based on Nyberg-Rueppel signature

在分析盲签名固有缺点的基础上,引入三个随机参数,完整地解决了Nyberg-Rueppel消息恢复签名的部分盲化问题,给出了Nyberg-Rueppel消息恢复签名的一般性部分盲化方法。通过对参数的不同选取,得到三个部分盲签名方案并对其进行效率比较,结论是方案1的效率高于方案2和3。方案2类似于张彤等人提出的方案,但是他们的方案无法抵抗窜改协定信息攻击,提出的方案在签名时使用了hash函数,从而可以抵抗这种攻击。对提出的方案进行安全性分析,结论是提出的方案具有完备性、不可伪造性和部分盲性。

One shortcoming of blind signature was that, since the signer＇ s view was completely shut off from the resulting signatures, the signatures may be used in an unintended way. This paper proposed a generalized Nyberg-Rueppel message recovery partial blind signature scheme by introducing three random parameters. Three partial blind signature schemes were obtained by choosing different parameters and the comparison of their efficiency was given, which shows that the first scheme is more efficient than the other two. The second scheme is similar to the scheme proposed by Zhangtong et al, but their scheme is not against changing agreed information attack. The proposed schemes are against this kind attack because of the employment of hash function. The security analysis of the proposed schemes was given, which shows they have the property of completeness, unforgeability and partial blindness.