The closed system has a certificate authority as part of one entity.

封闭系统的证书权限是一个实体的一部分。

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The signing authority "signs" a certificate using one of several cryptographic algorithms to generate a hash.

签发机构在证书上“签名”，用的是通过一种密码算法产生的散列值。

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In addition, a reputable certificate authority will require proof of the requestor's identity before issuing a certificate.

此外，著名的证书颁发机构需要先验证请求者的身份，然后才会颁发证书。

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The main component of a PKI is a certificate authority, which issues the certificate, keeps a repository of valid certificates and manages a protocol for registering, revoking or verifying them.

CNN: Technology - E-Signature Act may drive demand for authentication technology

But herein lies the heart of the problem, because the entire web security architecture rests upon the integrity of the embedded SSL certificate authority (CA) system.

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But that doesn't reflect the cost of internally managing and staffing a certificate authority, which usually is the most expensive component in a PKI.

CNN: Technology - E-Signature Act may drive demand for authentication technology