[AVTCORE] Roman Danyliw's No Objection on draft-ietf-avtext-framemarking-14: (with COMMENT)
Roman Danyliw via Datatracker <noreply@ietf.org> Thu, 13 April 2023 01:01 UTC
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From: Roman Danyliw via Datatracker <noreply@ietf.org>
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Cc: draft-ietf-avtext-framemarking@ietf.org, avtcore-chairs@ietf.org, avt@ietf.org, Jonathan Lennox <jonathan.lennox@8x8.com>, jonathan.lennox@8x8.com
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Date: Wed, 12 Apr 2023 18:01:25 -0700
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Subject: [AVTCORE] Roman Danyliw's No Objection on draft-ietf-avtext-framemarking-14: (with COMMENT)
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Roman Danyliw has entered the following ballot position for draft-ietf-avtext-framemarking-14: No Objection When responding, please keep the subject line intact and reply to all email addresses included in the To and CC lines. (Feel free to cut this introductory paragraph, however.) Please refer to https://www.ietf.org/about/groups/iesg/statements/handling-ballot-positions/ for more information about how to handle DISCUSS and COMMENT positions. The document, along with other ballot positions, can be found here: https://datatracker.ietf.org/doc/draft-ietf-avtext-framemarking/ ---------------------------------------------------------------------- COMMENT: ---------------------------------------------------------------------- Thanks to Carl Wallace for the SECDIR review. I support Paul’s DISCUSS for needing to discuss the privacy considerations. My refinement on his position is whether there would be any circumstance where an attacker knowing that an encrypted payload has a I-frame (as revealed by this extension) would provide additional information in traffic analysis style attack (i.e., observing the changes in the rate of the I-frames). A hypothetical scenario might be a variable rate codecs that reduces the I-frame rate in the absence of motion in the video (to save bandwidth), and increases the I-frame rate when there is motion (to improve the fidelity of the video stream). In such a circumstance, traffic analysis would reveal at least something about the encrypted payload (i.e., the presence or absence of motion)
- [AVTCORE] Roman Danyliw's No Objection on draft-i… Roman Danyliw via Datatracker