Secure hypertext transfer protocol


Secure hypertext transfer protocol

Secure hypertext transfer protocol (S-HTTP) is an alternative mechanism to the https URI scheme for encrypting web communications carried over HTTP. S-HTTP is defined in RFC 2660.

Web browsers typically use HTTP to communicate with web servers, sending and receiving information without encrypting it. For sensitive transactions, such as Internet e-commerce or online access to financial accounts, the browser and server must encrypt this information. The https: URI scheme and S-HTTP were both defined in the mid 1990s to address this need. Netscape and Microsoft supported HTTPS rather than S-HTTP, leading to HTTPS becoming the de facto standard mechanism for securing web communications. S-HTTP is an alternative mechanism that is not widely used.

External links

*RFC 2660
* [http://www.javvin.com/protocolHTTPS.html Technical description of S-HTTP]
* [http://www.linktionary.com/s/shttp.html Overview of S-HTTP]


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