Improving wireless privacy with an identifier-free link layer protocol Export

@inproceedings{greenstein:identifier, abstract = {We present the design and evaluation of an 802.11-like wireless link layer protocol that obfuscates all transmitted bits to increase privacy. This includes explicit identifiers such as MAC addresses, the contents of management messages, and other protocol fields that the existing 802.11 protocol relies on to be sent in the clear. By obscuring these fields, we greatly increase the difficulty of identifying or profiling users from their transmissions in ways that are otherwise straightforward. Our design, called SlyFi, is nearly as efficient as existing schemes such as WPA for discovery, link setup, and data delivery despite its heightened protections; transmission requires only symmetric key encryption and reception requires a table lookup followed by symmetric key decryption. Experiments using our implementation on Atheros 802.11 drivers show that SlyFi can discover and associate with networks faster than 802.11 using WPA-PSK. The overhead SlyFi introduces in packet delivery is only slightly higher than that added by WPA-CCMP encryption (10\% vs. 3\% decrease in throughput).}, address = {New York, NY, USA}, author = {Greenstein, Ben and Mccoy, Damon and Pang, Jeffrey and Kohno, Tadayoshi and Seshan, Srinivasan and Wetherall, David}, booktitle = {MobiSys '08: Proceeding of the 6th international conference on Mobile systems, applications, and services}, citeulike-article-id = {5807962}, citeulike-linkout-0 = {http://dx.doi.org/10.1145/1378600.1378607}, doi = {10.1145/1378600.1378607}, keywords = {80211, crawdad, privacy, uw\_sigcomm2004}, location = {Breckenridge, CO, USA}, month = {June}, pages = {40--53}, posted-at = {2009-09-20 22:30:37}, priority = {3}, publisher = {ACM}, title = {Improving wireless privacy with an identifier-free link layer protocol}, url = {http://dx.doi.org/10.1145/1378600.1378607}, year = {2008} }

TY - CONF ID - greenstein:identifier L3 - citeulike-article-id:5807962 N2 - We present the design and evaluation of an 802.11-like wireless link layer protocol that obfuscates all transmitted bits to increase privacy. This includes explicit identifiers such as MAC addresses, the contents of management messages, and other protocol fields that the existing 802.11 protocol relies on to be sent in the clear. By obscuring these fields, we greatly increase the difficulty of identifying or profiling users from their transmissions in ways that are otherwise straightforward. Our design, called SlyFi, is nearly as efficient as existing schemes such as WPA for discovery, link setup, and data delivery despite its heightened protections; transmission requires only symmetric key encryption and reception requires a table lookup followed by symmetric key decryption. Experiments using our implementation on Atheros 802.11 drivers show that SlyFi can discover and associate with networks faster than 802.11 using WPA-PSK. The overhead SlyFi introduces in packet delivery is only slightly higher than that added by WPA-CCMP encryption (10% vs. 3% decrease in throughput). CY - Breckenridge, CO, USA AD - New York, NY, USA EP - 53 TI - Improving wireless privacy with an identifier-free link layer protocol PB - ACM T2 - MobiSys '08: Proceeding of the 6th international conference on Mobile systems, applications, and services SP - 40 KW - 80211 KW - crawdad KW - privacy KW - uw_sigcomm2004 AU - Greenstein, Ben AU - Mccoy, Damon AU - Pang, Jeffrey AU - Kohno, Tadayoshi AU - Seshan, Srinivasan AU - Wetherall, David PY - 2008/June// UR - http://dx.doi.org/10.1145/1378600.1378607 ER -