Refer - Portuguese railway infrastructure authority WORK PERFORMED: New railway equipment fabrication and inspection of railway cars, PORTUGAL.

葡萄牙铁路基础设施管理局所做工作业绩：在葡萄牙，新铁路设备的制造以及对火车车厢的检测。

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A public key infrastructure (PKI) is a means for associating public keys with the respective user identities using a Certification Authority (ca).

公钥基础设施(PKI)是将公钥与使用证书颁发机构(CA)的相应用户标识进行关联的一种方法。

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It bounds the authority of an authentication aerver or AS (a component of Kerberos Infrastructure) of that realm for providing authentication to the principals who belong to the realm.

它界定了该领域的身份验证服务器或 AS（Kerberos 基础结构的组件）的权威机构，为属于该领域的主体 (principal) 提供身份验证。

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Encourage and develop better authentication systems, including PKI (public key infrastructure) and CA (certificate authority) schemes.

CNN: Global panel issues Internet security recommendations

After an almost two year procurement process and months of infrastructure assessments and security validations, Authority to Operate (ATO) certifications will be granted next month.

FORBES: GSA to Issue GovCloud ATOs July

Wednesday she referred further inquiry to the publicly funded Olympic Delivery Authority, which developed Olympic infrastructure, including the bicycle parks.

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