HTTPS HTTPS (Secure Hypertext Transfer Protocol) is secure version of HTTP. It is a Web protocol that encrypts and decrypts communication between a browser and a Web server. This secures that the communication can not be eavesdropped upon by intruders.
To log in to a Web site using HTTPS, users simply enter https as part of the URL in the address/location field of their browser. Example: https://www.mycompany.com. Not all Web servers, however, support HTTPS.
HTTPS uses port 443 instead of HTTP port 80 in its interactions with the lower layer, TCP/IP.
HTTPS support the use of X.509 digital certificates from the server so that, if necessary, a user can authenticate the sender.
