PKI是一种标准的公钥密码的密钥管理平台。PKI由签发证书的机构（CA），注册登记证书的机构（RA），存储和发布证书的目录，密钥管理，时间戳服务，管理证书的各种软件和硬件设备，证书管理与应用的各种政策和法律，以及证书的使用者等组成。
以下选项中不属于RA功能的是。（34）
- A.接收证书申请人的注册信息，并对其合法性进行认证
- B.签发证书
- C.批准或拒绝证书的申请
- D.批准或拒绝撤销证书的申请
正确答案及解析
正确答案
解析
根据分工，RA并不签发证书，而是负责对证书申请人的合法性进行认证，并决定是批准或拒绝证书申请。
证书的签发由CA进行。RA的主要功能如下：
①接收证书申请人的注册信息，并对其合法性进行认证；
②批准或拒绝证书的申请；
③批准或拒绝恢复密钥的申请；
④批准或拒绝撤销证书的申请；
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