Basic Diffrence between Http and Https

Hyper Text Transfer Protocol Secure (HTTPS), which is the encrypted version of its predecessor HTTP. Both of these protocols are used to transfer data from a website's server to the browser on your computer, but when you try to connect to a website using HTTPS, your browser will first ask the web server to identify itself. Then the server will send its unique public key which is used by the browser to create and encrypt a session key. This session key is then sent back to the server which it decrypts with its private key. Now all data sent between the browser and server is encrypted for the remainder of the session.

For example, a government could tell that a user is browsing Wikipedia, but couldn't tell that the user is specifically reading the page about Tiananmen Square.