Shulou(Shulou.com)06/02 Report--

Certificate:

What is the difference between CA (Certificate Authority) and certificates?

CA: a service in the server, which is mainly used to issue certificates for computers (users). The server on which CA is installed is called the certificate server.

Certificate: a file (tool) obtained from CA

two。 What is the purpose of the certificate?

a. Secure encryption-https://

b. Authentication-U Shield

3. How do I get a certificate?

a. Purchase a certificate from a certificate provider on the public network

Www.verisign.com www.sssl.com www.wosign.com

b. Install Certificate Services on the internal server and issue certificates through CA

4. What is the difference between the certificate purchased on the public network and the certificate issued by CA in the company's internal deployment?

A, the same point: from the perspective of security encryption, it is exactly the same.

B, difference:

* for certificates purchased on the public network, all clients trust the CA; issuing the certificate by default, while users do not trust the CA deployed by themselves.

* for many encryption, you need to go to CA to verify the validity of the certificate. If the CA does not work properly, the verification will fail, and encryption cannot be implemented.

When creating a certificate, the common name of the exchnage server needs to be exactly the same as the domain name accessed by the user. (mail.*.com.cn)

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