关键词: 盲签名, 盲性, 基于身份, 双线性对

Abstract: The blindness is a very important property of a blind signature scheme.Zhang et al have pointed out that Huang et al’s id-based blind signature doesn’t satisfy blindness.In this paper，an improvement is proposed，which not only mends the security leak but also retains the merits of the original id-based blind signature scheme.Analysis of Zheng et al’s blind signature based on bilinear parings shows that it doesn’t satisfy blindness.The improved scheme overcomes the disadvantage of it and also retains the merits of the original blind signature scheme based on bilinear parings.

Key words: blind signature, blindness, identity-based, bilinear pairings