Abstract: The blindness is an important property of a proxy blind signature scheme. For their shortcomings of having no blindness about Cai et al’s ID-based proxy blind signature and Hu et al’s ID-based proxy blind signature, two corresponding improved schemes are proposed. It shows that the two improved schemes overcome the disadvantages of the original signature schemes and also retain the merits of them.

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

摘要： 盲性是代理盲签名的一个重要特性。针对蔡光兴等人(计算机工程，2007年第9期)基于身份代理盲签名和胡江红等人(计算机工程与应用，2007年第18期)基于身份代理盲签名不具有盲性的缺点，该文提出相应的改进方案。结果表明，改进后的方案在保留原方案优点的同时克服了原方案的安全隐患。

关键词: 代理盲签名, 盲性, 基于身份, 双线性对

CLC Number: 

• TP309