摘要
首先分析了Zheng的基于椭圆曲线签密方案,指出Zheng的签密方案不具有前向安全性并且在实现不可否认性时丢失了机密性。然后,提出一个基于椭圆曲线的签密方案,并且利用对椭圆曲线离散对数问题和椭圆曲线的Diffie-Hellman问题的假设给出该方案的安全性分析,从而证明了该方案在满足机密性、可认证性、不可伪造性、完整性、和不可否认性的同时还满足公开可验证性和前向安全性。
Firstly, Zheng's signcryption based on elliptic curve is analyzed and the disadvantages of the scheme are pointed out, the disadvantages of Zheng's scheme are: the scheme doesn't have the property of forward security and when the scheme provides the property of non-repudiation, confidentiality lost. Then a signcryption based on elliptic curve is presented in this paper. Proofs of security are given using the hypothesis of the elliptic curve discrete logarithm problem and the elliptic curve Diffie-Hellman problem. The scheme not only has the properties of confidentiality, authentication, unforgeability, integrity and non-repudiation but also has the properties of public verifiability and forward security.
作者
杨晓茹
赵训
YANG Xiao-ru1, ZHAO Xun2 (1.College of Science, Guizhou University for Nationalities, Guiyang 550025, China; 2.Design Institute of Coal Mine in Guizhou, Guiyang 550000, China)
出处
《电脑知识与技术（过刊）》
2010年第15期3959-3961,共3页
Computer Knowledge and Technology
