This paper describes the method of Digital Signature in Digital Time Stamp Service System. The principle and algorithm of the RSA Public Key Cryptography Standard(PKCS) are presented in detailed. And Montgomery algorithm is given in the end. 介绍了数字时间戳服务中的数字签名技术,详细讨论了RSA公钥密码技术的算法及Montgomery模乘算法原理。
Elliptic curve cryptosystem has the advantages of height security, small computational complexity, high speed, small space and limited band width, and has been adopted as public key cryptography and digital signature standard by several international standard organization. 椭圆曲线密码体制有安全性能高、计算量小、速度快、占用空间小、带宽要求低等一系列优点,己逐渐被各大国际标准组织采纳为公钥密码和数字签名标准。