一类椭圆曲线混合公钥体制

A Scheme of Mixed Public-key Cryptosystem Based on Elliptic Curve

椭圆曲线密码体制作为新一代公钥密码的最佳方案,在近两年已成为密码学研究的焦点。椭圆曲线密码既可用于信息加密,又可用于数字签名,在网络安全与信息安全领域应用前景十分广阔。椭圆曲线密码体制用于信息加密时,由于体制本身的复杂性,导致加解密计算量大,难以满足对速度要求较高的应用场合的需要。文章根据混合公钥体制的思想,将ECDH密钥交换算法和分组加密算法有机结合起来,设计了一类有效的椭圆曲线混合公钥体制。该体制既拥有分组密码速度快、安全性高的优点,又拥有椭圆公钥体制在密钥分发方面的优点,有较高的实用性。

As an optimal scheme of advanced public-key cryptosystem,Elliptic Curve became a research focus in re-cent years.Elliptic Curve cryptosystem can be used both in Information Encryption and Digital Signature.It will become very popular in information security and network security using.But it could not match the high-speed application be-cause it's complexity.According the conception of mixed public-key cryptosystem,it designs a valid scheme in this pa-per.The scheme based on ECDH key exchange algorithm combine with block cipher,have the feature of convenience,secure and high processing speed.