An SSL encryption certificate is a server digital certificate that complies with the SSL Secure Sockets Layer protocol. The SSL security protocol was originally designed and developed by Netscape Communication Company of the United States, and its full name is: Secure Sockets Layer (Secure Sockets Layer)
It specifies a mechanism to provide data security layering between application protocols (such as HTTP, Telnet, FTP) and TCP/IP. It is a security protocol implemented on the transmission communication protocol (TCP/IP), using open Key technology that provides data encryption, server authentication, message integrity, and optional client authentication for TCP/IP connections. Because this protocol solves the insecure problem of plaintext transmission on the Internet, it quickly gained support from the industry and has become an international standard.
The SSL certificate is issued by the “trusted root certification authority” in the browser after verifying the identity of the server, and has dual functions of website authentication and encrypted transmission.
The role of the SSL encryption certificate:
1. By encrypting the transport layer with 128-256 bits to ensure the security of network transmission data. Use the https encryption protocol to access the website, build an encrypted channel between the client (browser) and the server, realize high-strength two-way encrypted transmission, ensure the security of user confidential information, and prevent the theft or tampering of important data such as user information and financial information . In other words, data security is more secure after installing an SSL certificate
2. Verify the real identity of the server. If you have installed an SSL certificate issued by a third-party authoritative organization, the security lock logo will be displayed in the address bar of the browser, and you can check the real identity of the website by clicking it. In addition, for some websites with EVSSL certificate installed, the entire address bar will turn green, which can be seen at a glance. The website has installed an SSL certificate, which can effectively avoid economic losses caused by website phishing and fraudulent websites.
