An SSL certificate is a digital certificate that complies with the SSL protocol. An SSL certificate is issued by a globally trusted certification authority after verifying the identity of the server. An SSL certificate has two main functions, namely authentication and data encryption. It can be used for trusted website authentication, application trusted authentication, protect the transmission of application data, ensure that privacy-sensitive information is not tampered with, and prevent data theft and information leakage. Integrate the world's mainstream generic domain names with more than 90% of national domain registrations