Requirements for End-to-Middle Security for the Session Initiation Protocol
RFC 4189, “Requirements for End-to-Middle Security for the Session Initiation Protocol”, is an Informational document published in October 2005 by K. Ono, S. Tachimoto. The canonical text is published by the RFC Editor.
Abstract
A Session Initiation Protocol (SIP) User Agent (UA) does not always trust all intermediaries in its request path to inspect its message bodies and/or headers contained in its message. The UA might want to protect the message bodies and/or headers from intermediaries, except those that provide services based on its content. This situation requires a mechanism called "end-to-middle security" to secure the information passed between the UA and intermediaries, which does not interfere with end-to-end security. This document defines a set of requirements for a mechanism to achieve end-to-middle security. This memo provides information for the Internet community.
What “Informational” means
Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.
The canonical text of RFC 4189 is hosted at rfc-editor.org. Available in TXT,HTML.
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