January 22, 2012

1.4.9 HTTPS


Hyper Text Transfer Protocol Secure (HTTPS) is a secure version of the Hyper Text Transfer Protocol (http). HTTPS is a combination of Hypertext Transfer Protocol (HTTP) with SSL/TLS protocol. It provides encrypted communication and secure identification of a network web server. HTTPS connections are often used for payment transactions on the World Wide Web and for sensitive transactions in corporate information systems.

HTTPS combines HTTP with SSL/TLS to provide encrypted communication. When a user connects to a website via HTTPS, the website encrypts the session with a digital certificate. A user can tell if they are connected to a secure website if the website URL begins with https:// instead of http://.

The default port is 443 and the URL begins with https://.

The main idea of HTTPS is to create a secure channel over an insecure network.

HTTPS is the use of Secure Socket Layer (SSL) or Transport Layer Security (TLS) as a sublayer under regular HTTP application layering. HTTPS encrypts and decrypts user page requests as well as the pages that are returned by the Web server.

HTTPS uses SSL to secure the channel between the client and server.

HTTPS is not to be confused with S-HTTP, a security-enhanced version of HTTP developed and proposed as a standard by EIT.

The protocol was originally created by Netscape for use with their browser and became a finalized standard with RFC 2818.

Secure Hypertext Transport Protocol (S-HTTP) is HTTP with message security (added by using RSA or a digital certificate). Whereas HTTPS creates a secure channel, S-HTTP creates a secure message. S-HTTP can use multiple protocols and mechanisms to protect the message. It also provides data integrity and authentication.

S-HTTP is seldom used and defaults to using port 80 (the HTTP port).


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