计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (29): 90-92.

• 网络、通信、安全 • 上一篇    下一篇

安全的无证书签密方案

魏春艳,蔡晓秋   

  1. 洛阳师范学院 数学科学学院,河南 洛阳 471022
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-10-11 发布日期:2011-10-11

Secure certificateless signcryption scheme

WEI Chunyan,CAI Xiaoqiu   

  1. College of Mathematics,Luoyang Normal University,Luoyang,Henan 471022,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-10-11 Published:2011-10-11

摘要: 基于离散对数困难问题和双线性对映射知识,提出了一种新的无证书签密方案,该方案能够满足机密性、可验证性、不可伪造性。此外,方案可以避免KGC被陷害,而当出现争端时,方案中的追踪算法也能够对可信中心KGC的积极不诚实行为进行识别,从而实现了真正的不可否认性。由于方案可以识别KGC的积极恶意攻击,所以对可信中心KGC的信任可达到Girault定义的信任等级3。

关键词: 无证书公钥密码学, 签密, 双线性对, 离散对数问题

Abstract: A new certificateless signcyption scheme is given based on discrete logarithm and bilinear pairing.The new scheme satisfies the properties of confidentiality,verifiability,non-forgeability and so on.Besides,the trusted center KGC in this scheme can avoid being framed and its malicious behaviour can be discovered by the trace algorithm.So,the scheme realizes real non-repudiation and reaches trust level 3 defined by Girault by tracing KGC’s positive malicious attack.

Key words: certificateless public key cryptography, signcryption, bilinear pairing, discrete logarithm