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Today, the editor will take you to understand the types of SSL certificates. The knowledge points in the article are very detailed. Friends who feel helpful can browse the content of the article with the editor, hoping to help more friends who want to solve this problem to find the answer to the problem. Follow the editor to learn more about the types of SSL certificates.

1. What is SSL?

SSL is the network communication encryption protocol, which is the abbreviation of Secure Sockets Layer. The whole transmission process of traditional http protocol is plaintext transmission, which can easily cause data hijacking and tampering. SSL protocol can encrypt the transmission process and effectively prevent data from being monitored and tampered with. In addition to SSL, we often see that TLS,TLS is the abbreviation of Transport Layer Security. TLS is actually a new specification after SSL, and SSL now refers to TLS in most cases.

two。 What is a SSL certificate?

SSL certificate is actually a kind of digital certificate that complies with SSL protocol. Generally speaking, it is similar to the proof of business license, but the proof object of SSL certificate is web server, so it is also called SSL server certificate. SSL certificates are issued by CA, a trusted digital certificate authority, after verifying the identity of the server, and have server authentication and data transfer encryption functions.

3. The function of SSL certificate

SSL certificate can establish a secure SSL transmission channel between client browser and web server, encrypt the transmitted data, ensure that the data is not monitored and tampered with in the process of transmission, and effectively ensure the accuracy, integrity and privacy of the data. At the same time, SSL certificate has the function of identity authentication, which can verify the identity of web server and effectively prevent the occurrence of user loss and user leakage caused by illegal websites and phishing sites.

4. Classification of SSL certificates

SSL certificates are classified into the following three categories according to the content of the certificate:

DV (Domain Validation)

OV (Organization Validation)

EV (Extended Validation)

(1) Domain name certificate (DV)

Prove the ownership of the domain name

When we open a website, we will see a lock sign in the URL input field, and click this flag to see the details of the SSL certificate.

(2) Organization Certificate (OV)

In addition to proving the ownership of the domain name, it also proves the existence of the institution.

(3) extended proof (EV)

A certificate issued after more rigorous scrutiny than DV,OV. In addition to the lock flag, the display on the browser also displays the green address bar and organization name information.

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