OpenSSL 是一个强大的安全套接字层密码库，囊括主要的密码算法、常用的密钥和证书封装管理功能及SSL协议，并提供丰富的应用程序供测试或其它目的使用。-OpenSSL is a powerful security socket layer password , include key and certificate password algorithm, the main common package management function and the SSL protocol, and

GNU MP is a library for arbitrary precision arithmetic, operating on signed integers, rational numbers, and floating point numbers. It has a rich set of functions, and the functions have a regular interface. -GNU MP is designed to be as fast as