计算机应用 ›› 2013, Vol. 33 ›› Issue (08): 2250-2252.

• 信息安全 • 上一篇    下一篇

无双线性对的无证书签名方案的分析及改进

王怡,杜伟章   

  1. 长沙理工大学 计算机与通信工程学院,长沙410114
  • 收稿日期:2013-03-01 修回日期:2013-03-30 出版日期:2013-08-01 发布日期:2013-09-11
  • 通讯作者: 王怡
  • 作者简介:王怡(1987-),女,湖南衡阳人,硕士研究生,主要研究方向:信息安全;
    杜伟章(1965-),女,湖南长沙人,教授,博士,主要研究方向:信息安全、纠错编码、计算数学。

Security analysis and improvement of certificateless signature scheme without bilinear pairing

WANG Yi,DU Weizhang   

  1. College of Computer and Communication Engineering, Changsha University of Science and Technology, Changsha Hunan 410114, China
  • Received:2013-03-01 Revised:2013-03-30 Online:2013-09-11 Published:2013-08-01
  • Contact: WANG Yi

摘要: 对王圣宝等(王圣宝,刘文浩,谢琪.无双线性配对的无证书签名方案.通信学报,2012,33(4):93-98)提出的不使用双线性配对运算的无证书签名方案进行安全性分析,指出该方案无法抵抗积极不诚实的恶意密钥生成中心(KGC)攻击,并给出了该攻击方式的具体攻击方法。针对这种攻击方式,提出了改进方案,并对改进的方案进行了安全性分析。分析结果表明,改进后的方案在保持原方案高效性的同时,能抵抗恶意KGC攻击,具有更高的安全性,并且改进后的方案不再需要使用安全通道,降低了通信复杂度。

关键词: 无证书签名, 椭圆曲线, 离散对数问题, 双线性对, 密钥生成中心

Abstract: By analyzing the security of a certificateless signature scheme without bilinear pairing proposed by Wang Shengbao, 〖WTBX〗et al.〖WTBZ〗 (WANG S B, LIU W H, XIE Q. Certificateless signature scheme without bilinear pairings. Journal on Communications, 2012, 33(4): 93-98), it indicated that the scheme could not resist malicious attack of positive dishonest Key Generation Center (KGC). For this kind of attack, detailed attack method was given, and an improved scheme was proposed. Finally, the security of the improved scheme was analyzed. The result shows that the proved scheme can resist the malicious KGC attack, maintain efficiency of the original scheme and has higher security. Meanwhile, the communication complexity is reduced due to the elimination of the security channel.

Key words: certificateless signature scheme, elliptic curve, Discrete Logarithm Problem (DLP), bilinear pairing, Key Generation Center (KGC)

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