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Re: [STDS-802-11-TGBN] Roaming TTT: Review of 11-26/0426 (Per-AP MLD PTK and related topics)

Hi all

26/0426 is now on r10 which is on the server: https://mentor.ieee.org/802.11/dcn/26/11-26-0426-10-00bn-lb291-mac-crs-for-st-per-ap-mld-ptk.docx
Recent revisions made a number of small changes and fixes (see the notes) based on feedback from several people.
I believe we have good convergence now on this - many thanks for the careful reviews and constructive inputs.

Best wishes
Thomas


On Mar 10, 2026 at 15:34:40, Thomas Derham <thomas.derham@xxxxxxxxxxxx> wrote:
Hi all

26/0426r4 is now on the server https://mentor.ieee.org/802.11/dcn/26/11-26-0426-04-00bn-lb291-mac-crs-for-st-per-ap-mld-ptk.docx

There are a number of updates based on received comments, including:
reformatted the PTKSA context list and conditions for clarity (and fixed WTK location); clarified PTK derivation formula and conditions under which SMD_KDK is derived; clarified usage of each PTK derivation formula; removed some draft normative text on PN usage in certain scenarios and replaced with general note on avoidance of nonce reuse; add description of key update if replay counters are updated during roam exec context transfer.

I believe there are some ongoing discussions on some details of UL replay counter sync, but hopefully they will come to a conclusion soon.

Thanks
Thomas

On Mar 8, 2026 at 18:38:55, Thomas Derham <thomas.derham@xxxxxxxxxxxx> wrote:
Hi all

26/0426r3 is now on the server, with text to address the UL replay counter topic as mentioned below, and also resolutions to 16 additional CIDs.

I believe I have responded to the feedback I received so far, additional review/comments are welcome...

Thanks
Thomas
 

On Mar 7, 2026 at 19:15:48, Thomas Derham <thomas.derham@xxxxxxxxxxxx> wrote:
Hi all

Thanks for the feedback when I presented 26/0426r1 during the MAC adhoc.
I have now uploaded R2, in which I have tried to address almost all the comments I received offline since:

There is one item that is highlighted in the Word comments, and relates to how UL replay counters are set on the target AP MLD. After discussing with several folks during the adhoc, there is a draft update to address this and I intend to incorporate it within the next R3 revision to be posted tomorrow.

Thanks
Thomas
 

On Mar 3, 2026 at 11:28:15, Thomas Derham <thomas.derham@xxxxxxxxxxxx> wrote:
Hi all

I have uploaded 26/0426r0 containing draft resolutions for the CIDs I was assigned on Per-AP MLD PTK and some roaming security topics. (Also attached for reference).
https://mentor.ieee.org/802.11/dcn/26/11-26-0426-00-00bn-lb291-mac-crs-for-st-per-ap-mld-ptk.docx
I would appreciate review and feedback, either on this thread or directly to me.

This covers around 50 CIDs:  4164, 4171, 4403, 4478, 4479, 4806, 4807, 5007, 5445, 5599, 5638, 5752, 6147, 6267, 6268, 6269, 6272, 6274, 6275, 6366, 6367, 6370, 6371, 6552, 6852, 6853, 6907, 7008, 7490, 9593, 9597, 10409, 10414 ,11139, 11351, 11352, 11356, 11360, 12030, 12163, 12349, 12375, 12382, 12404, 12407, 12408, 12417, 12427

Thanks
Thomas

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