CA System is designed in modularized theory.According to PKIX model defined in PKIX standard this system includes four parts: CA Server, RA Server, WebServer, Certificate/CRL/Key Backup Database.

• 本文以模块化的思想设计CA系统，根据PKIX规范定义的PKIX模型将系统分为四个部分：CA服务器、RA服务器、WebServer、证书/CRL/密钥备份数据库。