simpleca 比起正式的CA来说功能简单，但是满足CA的基本功能，对建立PKI开发环境很有帮助-simpleca than formal CA term functional simple, but to meet the basic functions of CA. the establishment of PKI development environment helpful

OpenSSL开源项目，关于PKI，加密与认证等网络安全相关的经典-OpenSSL PKI DES RSA