SSL certificate is a digital certificate that uses the SSL/TLS protocol to encrypt data transmission between the server and the client and provides authentication.
If you don't know about SSL certificates, they are also called something else:
HTTPS certificate (SSL certificate can upgrade the website from HTTP plaintext connection to HTTPS encrypted connection);
Website security certificate (protecting the security of website information transmission);
Server certificate (SSL certificate is deployed and used on the server);
SSL certificate/TLS certificate (using SSL Secure Socket Layer protocol and TLS Secure Transport Layer protocol).
From the "alias" of the SSL certificate, we can see the important role of the SSL certificate. Encrypt data transmission and protect website information transmission security. The so-called "encryption" means to make the transmitted information unreadable, which is very important in information transmission. The information encrypted by the private key in the SSL certificate can only be decrypted by the corresponding public key of the client. Similarly, the information encrypted by the public key can only be decrypted by the corresponding private key. Only the key can be decrypted, which can effectively prevent user information from being monitored, intercepted, or even tampered with.
Not only data encryption, the complete function of SSL certificate can also provide identity authentication. For example, OV Enterprise SSL Certificate and EV Extended Validation SSL Certificate not only realize data encrypted transmission, but also provide website identity authentication and directly display organizational unit information in the certificate (organizational units must be audited and verified to be authentic and valid).
An SSL certificate needs to be applied for, and the certificate will be issued after review and verification.
SSL certificates include single domain name, multiple domain names, wildcard and IP SSL certificates; there are also different verification levels such as DV/OV/EV; different brands such as DigiCet, GlobalSign and Sectigo, etc., different SSL certificates are suitable for different websites and Regarding encryption requirements, it is recommended that you consult before choosing according to your needs.