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This article will explain in detail how the SSL certificate works, and the editor thinks it is very practical, so I share it with you for reference. I hope you can get something after reading this article.

How does the SSL certificate work

Using SSL certificates, you can create a secure channel through which information, including user names, passwords, credit card numbers, and so on, can be securely transmitted.

First of all, SSL shook hands.

When a visitor enters a website protected by SSL, your SSL certificate automatically establishes a secure and encrypted connection with the visitor browser. Deploy SSL on all pages and subdomains to ensure the security of your site.

After the padlock icon is connected, the visitor's browser address bar begins with https to show the visitor that they can safely share personal details. If you install an extended Authentication (EV) SSL certificate, your website will display a green browser address bar and company name, indicating to the user that your company is a legitimate and trusted company.

Secure access

All information coming in and out of your site is now encrypted, making the data almost unassailable.

How does the https certificate work?

How https certificates work is that when you install a SSL certificate on a server and the browser connects to the server, the SSL certificate triggers the SSL or TLS protocol, which encrypts the information sent between the server and the browser (or between the server). Of course, the actual details of the certificate work may be more complicated.

SSL runs efficiently on the basis of Transmission Control Protocol (TCP) and plays an important protective role like a security blanket. It allows the higher protocol layer to remain the same while ensuring secure connections. So under the SSL layer, the other protocol layers work properly.

With the correct use of SSL certificates, attackers can only see which IP and port your network is connected to, and the approximate amount of data transmitted. An attacker may terminate the connection, but both the server and the user can determine that the connection has been disconnected by a third party. However, they cannot intercept any information, so the attack is basically futile.

Hackers may struggle to find the hostname to which the user is connected, but the key problem is that they can't find another URL. Because the connection is encrypted, important information is still secure.

1 after creating a TCP connection, SSL starts working, initiating a so-called "SSL handshake".

2 the server sends its certificate to the user along with several instructions, including the version of the SSL/TLS certificate and the encryption method used.

3 the user checks whether the certificate is valid, then selects the highest level of encryption that both the server and the certificate can support, and uses these encryption methods to start a secure session. Different sets of encryption methods have different encryption strengths, which are collectively referred to as cipher suites.

4 in order to ensure the integrity and authenticity of all transmitted information, SSL and TLS protocols also include an authentication process using information authentication code (MAC). The above steps sound lengthy and complex, but in fact they are done almost simultaneously.

About what is the operation of the SSL certificate to share here, I hope the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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