HTTPS | Hypertext Transfer Protocol Secure

Hypertext Transfer Protocol Secure is a secure version of HTTP. This protocol enables secure communication between a client (e.g. web browser) and a server (e.g. web server) by using encryption. HTTPS uses SSL (Secure Socets Layer) protocol and for encryption and TCP port 443 for communication.

 

HTTPS is commonly used to create a secure channel over some insecure network, e.g. Internet. By default, most traffic on the Internet is unencryped and susceptible to sniffing attacks. HTTPS encrypts sensitive information, which makes a connection secure.

 

HTTPS is usually not used on the entire website because encryption slows down the site. Instead, it is used only to protect sensitive information like usernames and passwords.

 

HTTPS URLs begin with https instead of http. In Internet Explorer, you can immediately recognize that a web site is using HTTPS because a lock appears to the right of the address bar: