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Code breakers crack GSM cellphone encryption
From: Dave Farber <dave () farber net>
Date: Sun, 07 Sep 2003 20:30:12 -0400
Date: Sun, 07 Sep 2003 17:23:06 -0700 From: Lauren Weinstein <lauren () vortex com> Subject: Re: [IP] Code breakers crack GSM cellphone encryption To: dave () farber net Cc: lauren () vortex com Dave, As the article implies, weaknesses -- both designed and accidental -- in GSM and other cellular systems' encryption are not really big news. Given the short range and rapid inter-cell handoffs involved in most real-world cellular deployments (particularly in metro areas), opportunistic monitoring or undetected interference with such calls in a practical manner would seem relatively limited in most cases. On the other hand, the primary parties interested in monitoring cell phone calls -- law enforcement, intelligence agencies, etc. -- will not generally be very concerned with the phones' air links at all, but will obtain their feeds much more efficiently from the centralized facilities (e.g. MTSO - Mobile Telephone Switching Office) that aggregrate an entire region's cellular traffic for a carrier. --Lauren-- Lauren Weinstein lauren () pfir org or lauren () vortex com or lauren () privacyforum org http://www.pfir.org/lauren Tel: +1 (818) 225-2800 Co-Founder, PFIR - People For Internet Responsibility - http://www.pfir.org Co-Founder, Fact Squad - http://www.factsquad.org Co-Founder, URIICA - Union for Representative International Internet Cooperation and Analysis - http://www.uriica.org Moderator, PRIVACY Forum - http://www.vortex.com Member, ACM Committee on Computers and Public Policy
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