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对基于椭圆曲线的代理签名的研究与改进

张宁;傅晓彤;肖国镇   

  1. (西安电子科技大学 信息保密研究所,陕西 西安 710071)

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2005-04-20 发布日期:2005-04-20

Study and improvement of proxy signature based on elliptic curves

ZHANG Ning;FU Xiao-tong;XIAO Guo-zhen

  

  1. (Research Inst. of Information Security & Privacy, Xidian Univ., Xi'an 710071, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2005-04-20 Published:2005-04-20

摘要: 对白国强等人提出的基于椭圆曲线离散对数问题的代理签名方案进行密码学分析,针对代理签名所应满足的性质对此方案做了一些改进,新的方案增添了身份识别性质,并在此基础上,应用椭圆曲线加密算法进一步提高了委托过程的安全性.

关键词: 密码学, 代理签名, 椭圆曲线离散对数问题, 身份识别

Abstract: We cryptanalyze the proxy signautre based on the Elliptic Curves proposed by Bai, and concerning the properties of proxy signatures, some improvement is made. The new scheme has the property of identifiability, and the Elliptic Curves Encryption algorithm is applied to the scheme, with the improved security of the delegation procedure.

Key words: cryptography, proxy signatures, ECDLP, identifiability

中图分类号: 

  • TN918