OK, so PN[0] = Least Significant Octet of PN. Suggest to do a table defining the crypto representation of every field (nonce, IV, …),
aligning with end-to-end test vectors.
--
Tao Chun Lee
| Tech Manager, Standards | Communication System Design, MediaTek Inc.
Email:
TaoChun.Lee@xxxxxxxxxxxx
| Phone: +886 3 560 0868 | Website: www.mediatek.com
From: Huang, Po-kai <po-kai.huang@xxxxxxxxx>
Sent: Wednesday, October 7, 2026 10:15 PM
To: TaoChun Lee (李道軍) <TaoChun.Lee@xxxxxxxxxxxx>; STDS-802-11-TGM@xxxxxxxxxxxxxxxxx
Subject: RE: [STDS-802-11-TGM] Clarification on the initialization vector construction of GMAC for BIP and CIP
Hi TaoChun,
I can give you an example of how this is done in the GCM nonce, and the same clarification is done for the IV in BIP and CIP, which aligns with the test vector. The exact proposed text is in
the document.
Best,
Po-Kai
From: TaoChun Lee (李道軍)
<TaoChun.Lee@xxxxxxxxxxxx>
Sent: Wednesday, October 7, 2026 7:09 AM
To: Huang, Po-kai <po-kai.huang@xxxxxxxxx>;
STDS-802-11-TGM@xxxxxxxxxxxxxxxxx
Cc: TaoChun Lee (李道軍) <TaoChun.Lee@xxxxxxxxxxxx>
Subject: RE: [STDS-802-11-TGM] Clarification on the initialization vector construction of GMAC for BIP and CIP
A bit difficult to read here, do you mean X[0] = Most Significant Octet of X, for X = IPN/BIPN or PN/CIPN, when constructing the TV IVs?
--
Tao Chun Lee | Tech
Manager, Standards | Communication System Design, MediaTek Inc.
Email:
TaoChun.Lee@xxxxxxxxxxxx
| Phone: +886 3 560 0868 | Website: www.mediatek.com
From: Huang, Po-kai <po-kai.huang@xxxxxxxxx>
Sent: Wednesday, October 7, 2026 7:27 PM
To: STDS-802-11-TGM@xxxxxxxxxxxxxxxxx
Subject: [STDS-802-11-TGM] Clarification on the initialization vector construction of GMAC for BIP and CIP
--- This message came from the IEEE 802.11 Task Group M Technical Reflector ---
Hi all,
I presented document 11-26-1633-10 addressing CIDs 2340, 2341, and 2342, with proposed resolutions to clarify the initialization vector construction for GMAC when used with BIP and
CIP.
https://mentor.ieee.org/802.11/dcn/26/11-26-1633-10-000m-cr-for-control-frame-protection.docx
The proposed clarification aligns with the test vectors in Annex J and the nonce construction used by GCMP. Specifically, it clarifies that the least significant octet (PN0) is the
last octet of the IPN/BIPN or PN/CIPN when constructing the initialization vector.
Per the suggestion of the TGm leadership, I am sharing this proposal with the reflector for broader review. Please let me know if you have any questions or comments.
Best,
Po-Kai
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