Completely Encrypting RTP Header Extensions and Contributing Sources
RFC 9335, “Completely Encrypting RTP Header Extensions and Contributing Sources”, is a Proposed Standard document published in January 2023 by J. Uberti, C. Jennings, S. Murillo. It updates RFC 3711. The canonical text is published by the RFC Editor.
Abstract
While the Secure Real-time Transport Protocol (SRTP) provides confidentiality for the contents of a media packet, a significant amount of metadata is left unprotected, including RTP header extensions and contributing sources (CSRCs). However, this data can be moderately sensitive in many applications. While there have been previous attempts to protect this data, they have had limited deployment, due to complexity as well as technical limitations.
This document updates RFC 3711, the SRTP specification, and defines Cryptex as a new mechanism that completely encrypts header extensions and CSRCs and uses simpler Session Description Protocol (SDP) signaling with the goal of facilitating deployment.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 9335 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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