Defeating IMSI Catchers

  title={Defeating IMSI Catchers},
  author={Fabian van den Broek and Roel Verdult and Joeri de Ruiter},
  booktitle={ACM Conference on Computer and Communications Security},
IMSI catching is a problem on all generations of mobile telecommunication networks, i.e., 2G (GSM, GPRS), 3G (HDSPA, EDGE, UMTS) and 4G (LTE, LTE+). Currently, the SIM card of a mobile phone has to reveal its identity over an insecure plaintext transmission, before encryption is enabled. This identifier (the IMSI) can be intercepted by adversaries that mount a passive or active attack. Such identity exposure attacks are commonly referred to as 'IMSI catching'. Since the IMSI is uniquely… CONTINUE READING
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