注册中心(registrationauthority,ra)认证：使用ra的X . 509证书和ra的私钥。
Registration authority (ra) authentication: the X.509 certificate of the ra and private key of the ra are used.
注册中心(registrationauthority,ra)认证：使用ra的X . 509证书和ra的私钥。
Registration authority (ra) authentication: the X.509 certificate of the ra and private key of the ra are used.
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