It had by then begun nicknaming the british systems after german cities, partly for ease of reference, partly for security . 当时它开始以德国的城市命名英国的密码系统,一半是为了便于对照,一半是为了保密。
Hash functions are fundamental to modern cryptography 哈希函数是现代密码系统的基础。
A public key cryptosystem based on compound encryption 一种基于复合加密的公钥密码系统
A hierarchical identity - based cryptosystem 一个基于分级身份的密码系统