1 / 8

Improved CCMP PN Usage for Reliable Packet Order

Enhance network security by ensuring consistent Packet Number ordering in CCMP protocol. Update MIC and CTR usage for better performance and easier hardware implementation. Instructions for incorporating changes in TGi spec draft.

rae-mccarty
Télécharger la présentation

Improved CCMP PN Usage for Reliable Packet Order

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. Improved CCMP PN Usage Mark Matson mmatson@broadcom.com David Johnston david.johnston@ieee.org Mark Matson, Broadcom; David Johnston, Mobilian.

  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 Mark Matson, Broadcom; David Johnston, Mobilian.

  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 Mark Matson, Broadcom; David Johnston, Mobilian.

  4. Packet Number Is Broadcast and Received As PN0-5 Mark Matson, Broadcom; David Johnston, Mobilian.

  5. Use in CTR_PRELOAD in Same Order Mark Matson, Broadcom; David Johnston, Mobilian.

  6. Use in MIC_IV in Same Order Mark Matson, Broadcom; David Johnston, Mobilian.

  7. The Text • Document 12-02-xxxr0 contains text and instructions to the editor for making changes to section 8.3.4 and its subsections. • Changes are with respect to D3.0 of TGi spec. Mark Matson, Broadcom; David Johnston, Mobilian.

  8. Motion • Instruct the editor to incorporate into the draft the changes described in document 11-02-xxxr1 Mark Matson, Broadcom; David Johnston, Mobilian.

More Related