Which of the following is NOT related to a Public key infrastructure (PKI)?以下哪个概念与公钥基础设施(PKI)无关?()
- A、A X.509 certificate(X.509证书)
- B、A Ticket Granting Service(票据授予服务)
- C、A Registration authority(注册机构)
- D、A Certificate authority(证书机构)
正确答案:B
答案解析:有
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