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Re: [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 ---

 

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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