典型代理签名方案的分析与改进

Analysis and Improvements for Proxy Signature Schemes

简述了代理签名及其应用的研究成果和发展状况,分析了现有的、对学科发展有重要意义的几个典型代理签名方案,指出其中存在的一些缺陷,给出了Lee方案的一个改进方案。该方案克服了Lee方案的弱点,满足强不可伪造性。该文还提出了这方面研究目前所存在的问题及几个值得重视的研究方向。

In this paper,we survey the achievements in the field of proxy signatures,analyse a few typical proxy signature schemes,which have important significance for the development of this study field.And then we give an improved scheme ,which gets over the weakness of Lee's scheme ,satisfies strong unforgeability.Some problems in the study of this field are presented,and several main research directions are pointed out as well.