1 / 8

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: Dallas 802.11i/802.15 Liaison Report. Date Submitted: 14 March, 2003 Source: Daniel V. Bailey Company: NTRU Address: 5 Burlington Woods, Burlington, MA 01803

joey
Télécharger la présentation

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: Dallas 802.11i/802.15 Liaison Report. Date Submitted: 14 March, 2003 Source: Daniel V. Bailey Company: NTRU Address: 5 Burlington Woods, Burlington, MA 01803 Voice: 781-418-2522 , FAX: 781-418-2532, E-Mail: dbailey@ntru.com Abstract: Purpose: For information Notice: This document has been prepared to assist the IEEE P802.15. 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 • Yes: 76.28%, No: 23.72%, Abs: 7.12% • Yes: 209, No: 65, Abs: 21 • Total voting members: 321 • Total returned: 295 • Total returned %: 91.90% • 2,074 comments received • 1,262 technical Daniel V. Bailey, NTRU

  3. Seattle ad-hoc • Minutes in 11-03-150r0-I-TGi-Seattle-WA-Meeting-Minutes-February-2003.doc • Entering March plenary, about 75% of comments have been resolved Daniel V. Bailey, NTRU

  4. Major Issue: Roaming • Roaming and secure handoff too slow for uninterrupted VoIP (11-03-084r1) • STA moving from AP to AP securely • Compromise proposal in 11-03-241r0 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. 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 11-03-241r0 Daniel V. Bailey, NTRU

  6. Initial Association AS STA AP 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) Access ACCEPT (PMK1) 802.1X/EAP-SUCCESS 4-way handshake Group Key Install TK Install TK Daniel V. Bailey, NTRU

  7. PMK-R, PMKIDSTA, Counter1 PMK-R, PMKIDAP, Counter2 Re-assoc Resp (RSN IE, {Fast-Rekey IE(Counter2, Arand, RSC, EKMEK(GTK), MIC)}) EAPOL-Key( Arand, MIC) Install TK Counter2 = Counter1 Install TK AP Rekeying Re-association STA 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 else initiate 802.1X Daniel V. Bailey, NTRU

  8. 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

More Related