[Sframe] Protocol Action: 'Secure Frame (SFrame)' to Proposed Standard (draft-ietf-sframe-enc-09.txt)
The IESG <iesg-secretary@ietf.org> Fri, 05 April 2024 15:06 UTC
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Date: Fri, 05 Apr 2024 08:06:44 -0700
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Subject: [Sframe] Protocol Action: 'Secure Frame (SFrame)' to Proposed Standard (draft-ietf-sframe-enc-09.txt)
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The IESG has approved the following document: - 'Secure Frame (SFrame)' (draft-ietf-sframe-enc-09.txt) as Proposed Standard This document is the product of the Secure Media Frames Working Group. The IESG contact persons are Murray Kucherawy and Orie Steele. A URL of this Internet-Draft is: https://datatracker.ietf.org/doc/draft-ietf-sframe-enc/ Technical Summary This document describes the Secure Frame (SFrame) end-to-end encryption and authentication mechanism for media frames in a multiparty conference call, in which central media servers (selective forwarding units or SFUs) can access the media metadata needed to make forwarding decisions without having access to the actual media. The proposed mechanism differs from the Secure Real-Time Protocol (SRTP) in that it is independent of RTP (thus compatible with non-RTP media transport) and can be applied to whole media frames in order to be more bandwidth efficient. Working Group Summary This document is the input document that caused the formation of the SFrame working group. It is substantially the same as that original input on a technical level, though many aspects of that design have been tested in the working group. The editorial quality is significantly improved and more robust security and deployment considerations are now present. The one major addition was the inclusion of a concrete usage of MLS for key management, which was originally in a separate draft. This work spent a long time without a lot activity, interspersed with short bursts of high productivity. The WG chairs believe that sufficient input has been received despite this. Document Quality Implementations and deployments exist. Test vectors are included and are produced and checked by an automated system. This document includes a very straightforward integration of AEAD and HKDF. Careful security review from outside of the working group will be helpful, but this shepherd believes that this has a low risk profile due to the extreme lack of novelty. There is no formal analysis. Personnel The Document Shepherd for this document is Martin Thomson. The Responsible Area Director is Murray Kucherawy.