1. https = http + ssl (Secure Sockets Layer).
2. Security certificate: Contains information such as the server's ip, host domain name, private key, public key, and issuing authority (CA). The certificate is read-only.
3. https ensures the security of ApplicationData. This is because https is encrypted when http is transmitted to tcp to prevent data from being stolen, and at the same time, it can ensure the security of the accessed server. This is because the IP that can be passed through the certificate is consistent with the actually accessed IP. Access to the correct service is guaranteed.
4. The encryption process requires the public key in the certificate + the random number generated by the client side + the random number generated by the server side to generate the encrypted secret key (algorithm).
5. Free certificate application: https://zhangge.net/4890.html ( https://login.wosign.com/reg.html )
6. Install the certificate: https://zhangge.net/4861.html
7. How to convert http site to https site: http://www.chinaz.com/web/2015/0325/393194.shtml