PKI ( Public Key Infrastructure) /CA ( Certificate Authority ) System is a basic and key technology that is used to solve the reality, safety and integrality of online exchange. In particular, CA is a necessary and key component of the system.

• 公钥基础设施(PKI)系统正是实现网上交易真实性、安全性、完整性和不可否认性的关键技术,而CA(证书授权)认证中心是PKI系统的重要组件。