5. Protecting data exchanges over a radio link

Historically, before RSN was defined, radio link security was ensured by the WEP solution. Since then, higher-level security solutions – TKIP and CCMP – have been defined. In the rest of this paragraph, we refer to MPDU (802.11 MAC Protocol Data Unit ) and MSDU (802.11 MAC Service Data Unit ).

An MPDU corresponds to a frame to be transmitted on the 802.11 network, and an MSDU to a set of useful data to be transmitted and integrated into the MPDU frame before transmission on the network. An MSDU is generally (except in the case of fragmentation) smaller in size than an MPDU, as the protocol very often adds information elements to the frame to be transmitted, for example to check its integrity.

5.1 WEP (Wired Equivalent...

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Protecting data exchanges over a radio link

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Bibliography

(1) - PUJOLLE (G.) - Sécurité des réseaux WiFi. - Chapitre issu de « La sécurité dans les réseaux sans fil et mobiles 2 : Technologies du marché », Traité IC2, série Réseaux et Télécoms, É. LAVOISIER, ISBN 2 978-2-7462-1698-3, mai 2007.
(2) - CHAOUCHI (H.),...

Websites

Club de la Sécurité de l'Information Français, IT threats and security practices in France, 2008 Edition https://clusif.fr/publications/menaces-informatiques-pratiques-de-securite-france-edition-2018-rapport/ (page consulted on December 23, 2009)

Standards and norms

IEEE p. 802.11s/d2.06 : Part 11 : Wireless LAN MAC and physical layer specifications, amendment 10 : Mesh networking. IEEE draft - IEEE 802.11s TG - 01-09
IEEE std. 802.11-2007 (revision of IEEE std. 802.11-1999) : Part 11 : Wireless LAN MAC and physical layer specifications. IEEE standard - IEEE 802.11 TG - 06-07
IEEE std. 802.1x-2004 : Port based network access control. IEEE standard - IEEE 802.1X TG...