Manage system for personnel authorization certificate, stamp and signature;

管理人员授权证书，印章和签署；

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The third part is the case annex that includes appendix, reference documents and authorization certificate for case use.

第三部分为案例附件，包括了附录，参考文献和案例使用授权书。

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SPKI is a sort of distributed authorization mechanism, which combines authorization certificate and name certificate to realize identity validation and authorization management.

SPKI是一种分布式的授权机制，采用授权证书和名字证书结合的方式来实现身份认证和权限控制。

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He said operators of planes must get a certificate of authorization from the FAA, and the craft are to be flown under 400 feet and primarily in daytime hours.

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