Hi Xuwen,
Thanks for preparing these documents. I agree with Mike’s comments. The PTKName can be used to obtain the PTK regardless which PTK mode is used.
Regards
Guogang Huang
发件人: Zhao Xuwen [mailto:zhaoxuwen123@xxxxxxxxxxx]
发送时间: 2025年11月7日
16:21
收件人: M Montemurro <montemurro.michael@xxxxxxxxx>
抄送: STDS-802-11-TGBN@xxxxxxxxxxxxxxxxx; Duncan Ho <dho@xxxxxxxxxxxxxxxx>; binitag@xxxxxxxxx; yang.zhijie@xxxxxxxxxx; huangguogang <huangguogang1@xxxxxxxxxx>;
周培 <zhoupei36@xxxxxxxxx>; thomas.derham@xxxxxxxxxxxx
主题: 回复: [STDS-802-11-TGBN] 11-25/2015 - lb291-mac-cr-for-cid-4808-in-37.16.5 (roaming security issue)
Hi Mike,
Thanks for your feedback.
Xuwen Zhao
TCL
Hi Zhao Xuwen,
I reviewed 11-25/2016 and my preference would be to go with these text changes.
Hi Mike,
thank you for your feedback.
In fact, I’ve prepared two options. The other CR document is
11-25/2016r1, which describes a solution where the Target AP MLD queries the old PTK from the SMD-ME based on the PTK Name and then derives the new PTK. I suggest you review 11-25/2016 as well
— its concept should be closer to your idea.
I don’t have a strong preference between the two options; what I’d like to do is to improve the process description
in the current Draft to make the overall procedure easier to understand.
Thanks,
Xuwen Zhao
TCL
Hello Zhao Xuwen,
I reviewed the changes and in my opinion, the information that you are looking to include would be in the scope of the PTK, not the PMK. The reason is because
in any of these transitions, the non-AP MLD is associated to the SMD-ME. The PTK is the key resulting from this association (a PMK, or PMK-R1 in the case of FT, can be cached for subsequent associations).
The PMK or PMKID do not need to be able to be transmitted from the SMD-ME to the target AP MLD.
It could be that we derive the following:
- For shared PTK, a PTKName
- For per-MLD PTK, a PTKName associated with the per-AP MLD PTK.
Dear SMD BSS transition(Seamless Roaming) TTT members,
I have uploaded the following CR doc that addresses roaming security issue.
Please review and share any feedback in this email thread.
11-25/2015
- lb291-mac-cr-for-cid-4808-in-37.16.5
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