1. Submission Title: Dallas 802.11i/802.15 Liaison Report.
January, 2003
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: Dallas i/ Liaison Report.
Date Submitted: 14 March, 2003
Source: Daniel V. Bailey Company: NTRU
Address: 5 Burlington Woods, Burlington, MA 01803
Voice: , FAX: ,
Abstract:
Purpose: For information
Notice: This document has been prepared to assist the IEEE P It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.
Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15
Daniel V. Bailey, NTRU

2. Post LB 52 LB52 concluded before Ft. Lauderdale
January, 2003
Post LB 52
LB52 concluded before Ft. Lauderdale
Yes: 76.28%, No: 23.72%, Abs: 7.12%
Yes: 209, No: 65, Abs: 21
Total voting members: 321
Total returned: 295
Total returned %: %
2,074 comments received
1,262 technical
Daniel V. Bailey, NTRU

3. January, 2003
Seattle ad-hoc
Minutes in r0-I-TGi-Seattle-WA-Meeting-Minutes-February-2003.doc
Entering March plenary, about 75% of comments have been resolved
Daniel V. Bailey, NTRU

4. January, 2003
Major Issue: Roaming
Roaming and secure handoff too slow for uninterrupted VoIP ( r1)
STA moving from AP to AP securely
Compromise proposal in r0 was not accepted by the group, but the sense of the group was that it was a good starting point.
Daniel V. Bailey, NTRU

5. January, 2003
Major Issue: Roaming
In draft 3, when a device roams from one AP to another it has to reestablish symmetric keys from scratch
Compromise suggests using Pairwise Master Key delivered by AS as the base roaming key to generate AP-STA unique data keys
And a different key derivation function to allow STAs to precompute the AP-STA key
Next two slides from r0
Daniel V. Bailey, NTRU

6. Initial Association AS STA AP January, 2003 802.11 Open Authentication
Association Req + RSN IE
Association Response (success)
EAP type specific mutual authentication
AKM is relayed to AS using same back-end protocol (e.g. Radius attribute)
Derive Pairwise Master Key (PMK1)
Derive Pairwise Master Key (PMK1)
802.1X/EAP-SUCCESS
Access ACCEPT (PMK1)
4-way handshake
Group Key
Install TK
Install TK
Daniel V. Bailey, NTRU

7. Rekeying Re-association
January, 2003
Rekeying Re-association AP
STA
PMK-R, PMKIDSTA, Counter1
PMK-R, PMKIDAP, Counter2
Counter1 = Counter1 + 1,
PTK-R = KMIK | KMEK | TK = Roaming-PRF()
Re-assoc Req (RSN IE(AKM=RKH, {PMKIDSTA}), {Fast-Rekey IE(Counter1 , Srand)})
if MKIDSTA == MKIDAP
if (AKM=RKH and Counter1 > Counter2)
then
KMIK | KMEK | TK = Roaming-PRF()
else
initiate 4-way handshake
initiate 802.1X
Re-assoc Resp (RSN IE, {Fast-Rekey IE(Counter2, Arand, RSC, EKMEK(GTK), MIC)})
EAPOL-Key( Arand, MIC)
Install TK
Counter2 = Counter1
Daniel V. Bailey, NTRU

8. Next Steps Ad-Hoc March 22, 23 & 24 Recirculation expected in March
January, 2003
Next Steps
Ad-Hoc March 22, 23 & 24
Santa Clara, CA
Recirculation expected in March
Now expect sponsor ballot in December.
WiFi Alliance expects to begin certifying AES-CCM implementations in January 2004
Daniel V. Bailey, NTRU