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HTTPS is encrypted in order to increase security of data transfer. This is particularly important when users transmit sensitive data, such as by logging into a bank account, email service, or health insurance provider. Any website, especially those that require login credentials, should use HTTPS.
e. Hypertext Transfer Protocol Secure ( HTTPS) is an extension of the Hypertext Transfer Protocol (HTTP). It uses cryptography for secure communication over a computer network, and is widely used on the Internet.   In HTTPS, the communication protocol is encrypted using Transport Layer Security (TLS) or, formerly, Secure Sockets Layer (SSL). The protocol is therefore also referred to as HTTP over TLS,  or HTTP over SSL .
As a result, HTTPS is far more secure than HTTP. A website that uses HTTP has http:// in its URL, while a website that uses HTTPS has https://. What is HTTP? HTTP stands for Hypertext Transfer Protocol, and it is a protocol – or a prescribed order and syntax for presenting information – used for transferring data over a network. Most information that is sent over the Internet, including website content and API calls, uses the HTTP protocol.
HTTP/2 is a major new version of the HTTP protocol supported in all major web browsers. It adds compression, pipelining, and other features that help make web pages load faster. All web browsers require sites to use HTTPS encryption if they want these useful new HTTP/2 features. Modern devices have dedicated hardware to process the AES encryption HTTP requires, too.
Hypertext Transfer Protocol Secure (HTTPS) is a protocol that secures communication and data transfer between a user's web browser and a website. HTTPS is the secure version of HTTP. The protocol protects users against eavesdroppers and man-in-the-middle ( MitM) attacks. It also protects legitimate domains from domain name system (DNS) spoofing attacks.
HTTPS is very similar to HTTP, with the key difference being that it is secure, which is what the s at the end of HTTPS stands for. HyperText Transfer Protocol Secure uses a protocol called SSL (Secure Sockets Layer) or TLS (Transport Layer Security), which essentially wraps the data between your browser and the server in a secure, encrypted tunnel over port 443 .
An HTTP cookie (web cookie, browser cookie) is a small piece of data that a server sends to a user's web browser. The browser may store the cookie and send it back to the same server with later requests. Typically, an HTTP cookie is used to tell if two requests come from the same browser—keeping a user logged in, for example.