Doc.: IEEE 802.11-02/611r6 Submission December. 2002 Mark Matson, Broadcom; David Johnston, Mobilian.Slide 1 Improved CCMP PN Usage Mark Matson

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Simplifying Implementation of CCMP Mode

Motions to Address Some Letter Ballot 52 Comments

Reconsidering RA-OLSR

Suggested Practice for SFD and Draft Spec Text Proposal

Clarified CCM Diagrams

Multicast Replay Detection Fred Stivers, Texas Instruments

RSC Pools for Mgmt Frames

RSC Pools for Mgmt Frames

Element for Legacy Indication

Multicast Replay Detection Fred Stivers, Texas Instruments

Multicast Replay Detection Fred Stivers, Texas Instruments

TKIP Key Mixing Code And Vectors

CCMP Nonce Construction

Multicast Replay Detection Fred Stivers, Texas Instruments

CCMP Nonce Construction

Clarifying TKIP MIC processing format Fred Stivers, Texas Instruments

CCMP MIC Processing Paul Lambert September 2002

Amendment for emergency alert system notification

Result: Yes - ; No - ; Abstain - .

802.11s motion Date: Authors: November 2007 Month Year

Presentation transcript:

doc.: IEEE /611r6 Submission December Mark Matson, Broadcom; David Johnston, Mobilian.Slide 1 Improved CCMP PN Usage Mark Matson David Johnston

doc.: IEEE /611r6 Submission December Mark Matson, Broadcom; David Johnston, Mobilian.Slide 2 Problem CCMP Packet Number Ordering Is Inconsistent: –Broadcast order changed to LS (octet 0) first –MIC and CTR usage remained MS first –Early specs didn’t show byte reversal –During reception, hardware implementation must buffer and reverse this one field only –Increased complexity

doc.: IEEE /611r6 Submission December Mark Matson, Broadcom; David Johnston, Mobilian.Slide 3 Solution Insert PN into MIC_IV and CTR_PRELOAD in the same order it’s broadcast (octet 0 first) Maintains security –Satisfies NIST CCM nonce requirements –PN field remains unique for each packet –PN still available to facilitate replay detection

doc.: IEEE /611r6 Submission December Mark Matson, Broadcom; David Johnston, Mobilian.Slide 4 Packet Number Is Broadcast and Received As PN0-5

doc.: IEEE /611r6 Submission December Mark Matson, Broadcom; David Johnston, Mobilian.Slide 5 Use in CTR_PRELOAD in Same Order

doc.: IEEE /611r6 Submission December Mark Matson, Broadcom; David Johnston, Mobilian.Slide 6 Use in MIC_IV in Same Order

doc.: IEEE /611r6 Submission December Mark Matson, Broadcom; David Johnston, Mobilian.Slide 7 The Text Document xxxr0 contains text and instructions to the editor for making changes to section and its subsections. Changes are with respect to D3.0 of TGi spec.

doc.: IEEE /611r6 Submission December Mark Matson, Broadcom; David Johnston, Mobilian.Slide 8 Motion Instruct the editor to incorporate into the draft the changes described in document xxxr1