What is an SSL certificate?

The Secure Socket Layer (SSL) protocol was initially developed by Netscape enterprises and has become a global standard for the network to identify websites and web page viewers, as well as encrypted communication between browser users and web servers. As SSL technology has been established on all major browsers and web serversProgramTherefore, you only need to install a digital certificate or server certificate to activate the server function.

In layman's terms, SSL certificates provide two basic functions:

Data transmission Encryption

Generally, Internet access and browsing are based on the standard TCP/IP protocol, and the content is transmitted on the network in the form of data packets. Because the data packet content is not encrypted, any person who intercepts the data packet can obtain the content. If the user name, password, or other private data transmitted in the data packet are easily stolen by others.

SSL can establish an encrypted channel between the client (such as a browser) used by the user and the server. All data transmitted over the network will be encrypted first, the decryption is performed after the data is transmitted to the destination. In this way, the real-time data packets are intercepted during the transmission, and it is difficult to crack the content.

Server ID

At present, counterfeit websites have become a serious threat to Internet use. counterfeits can create an interface identical to that of a real website and use similar domain names to guide users to access the website. For example, the real industrial and commercial bank website is www.icbc.com.cn, and counterfeits use a similar domain name: www.1cbc.com.cn. The letter I is replaced with the number 1. If you do not pay attention to it, it is easy to fall victim to it. Once the account password and other information are entered during the use of the counterfeit website, it will be recorded by the counterfeit website and then used falsely, threatening the security of the user's account.

The SSL server certificate can effectively prove the real identity of the website and the validity of the domain name used, so that users can easily identify real websites and counterfeit websites. When applying for an SSL server certificate, the applicant's identity is confirmed through strict review. The user can view the certificate content when visiting the website, it contains the website's real domain name, website owner, certificate issuing organization, and other information. The browser also provides the corresponding security identifier, so that the visitor can use it with confidence.