注册中心负责审核证书申请者的真实身份，在审核通过后，负责将用户信息通过网络上传到认证中心，由认证中心负责最后的制证处理。证书的吊销、更新也需要由注册机构来提交给认证中心做处理。
注册机构 Regional Internet Registry ; registration authority ; LIR
区域性互联网注册机构 RIR
地址注册机构 LACNIC
健康注册机构 Health Registration Authority ; llapotjegyz ; kunnonhallinta
本地注册机构 local registration authority
贡献者注册机构 Contributing Registers
国家电影注册机构 National Film Registry
亚太互联网注册机构 APNIC
一级注册机构 Primary Register
澳大利亚注册机构代码 ARBN ; Australian registered body number
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注册机构是用来对客户进行注册、获取、查找、更新及吊销证书的一个前台。
The Registration Authority is used for registering, obtaining, finding out, upgrading and revoking a stage of the certificate to the customer.
就PK I实体来讲主要由两部分构成：注册机构(RA)和认证机构(CA)。
Formed by two parts mainly as to PKI entity: The Registration Authority (ra) and Certificate Authority (ca).
来自美国网络号码注册机构（ARIN）的消息称，再有不到一年的时间，全球的IP地址将用光。
The Internet will run out of Internet addresses in about 1 year's time , we were told today by John Curran, President and CEO of the American Registry for Internet Numbers (ARIN).
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