HyperText Transmission Protocol, Secure - significado y definición. Qué es HyperText Transmission Protocol, Secure
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Qué (quién) es HyperText Transmission Protocol, Secure - definición

WEB ENCRYPTION METHOD SIMILAR TO HTTPS
S-HTTP; SHTTP; Shttp; Secure hypertext transfer protocol; Secure HTTP

HyperText Transmission Protocol, Secure      
<protocol> (HTTPS) A variant of HTTP used by Netscape for handling secure transactions. The Netscape Navigator supports a URL access method, "https", for connecting to HTTP servers using SSL. "https" is a unique protocol that is simply SSL underneath HTTP. You need to use "https://" for HTTP URLs with SSL, whereas you continue to use "http://" for HTTP URLs without SSL. The default "https" port number is 443, as assigned by the Internet Assigned Numbers Authority. http://netscape.com/info/security-doc.html. (1995-01-16)
SHTTP         
Secure HyperText Transfer Protocol (Reference: HTTP), "Style: S-HTTP"
Secure Hypertext Transfer Protocol         
Secure Hypertext Transfer Protocol (S-HTTP) is an obsolete alternative to the HTTPS protocol for encrypting web communications carried over the Internet. It was developed by Eric Rescorla and Allan M.

Wikipedia

Secure Hypertext Transfer Protocol

Secure Hypertext Transfer Protocol (S-HTTP) is an obsolete alternative to the HTTPS protocol for encrypting web communications carried over the Internet. It was developed by Eric Rescorla and Allan M. Schiffman at EIT in 1994 and published in 1999 as RFC 2660.

Even though S-HTTP was first to market, Netscape's dominance of the browser market led to HTTPS becoming the de facto method for securing web communications.