一个精简的CA程序，包含根证书创建、用户证书申请及创建、证书管理、证书撤销等许多功能。是了解CA及证书原理的好工具。,CA a streamlined procedures, including creation of the root certificate, certificate applications and users to create, certificate management, certificate revocation and many other functions.

一个小型证书管理系统，用到openssl-A small certificate management system, use openssl

这是一个关于数字证书的系统，里面有详细的设计说明，对于编程设计有一定的帮助。-This is a digital certificate on the system, there are detailed design shows that the program will certainly help with the design.