https://www.iacr.org/cryptodb/data/paper.php?pubkey=34281

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Time-memory Trade-offs Sound the Death Knell for GPRS and GSM

              Tristan Claverie , ANSSI, IRISA, INSA de Rennes
              Gildas Avoine , INSA de Rennes, IRISA
  Authors:    Diane Leblanc-Albarel , Cosic Group, KU Leuven
              Xavier Carpent , University of Nottingham
              Christope Devine , ANSSI

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Presentation: Slides
 Conference:  CRYPTO 2024
              This paper introduces a practical TMTO-based attack
              against GSM (A5/3) and GPRS (GEA-3), which are both
              technologies used in 2G mobile networks. Although
              designed in the 80s, such networks are still quite
              active today, especially for embedded systems. While
              active attacks against 2G networks with a fake base
              station were already known for a while, the attack
              introduced in this paper relies on a passive attacker.
              We explain in the paper how to find material in GPRS
  Abstract:   and GSM communications to perform a TMTO attack and we
              experimented this step with off-the-shelf devices
              operated in real-life networks. We provide the success
              probability of the attack and its performances for
              several real-life scenarios. We optimized the
              implementation of KASUMI with AVX2 instructions, and we
              designed a specific TMTO implementation to get around
              the SSD access latency. For example, an attacker
              passively eavesdropping a GSM communication between a
              target and a base station can decrypt any 2-hour call
              with probability 0.43, in 14 min.

BibTeX

@inproceedings{crypto-2024-34281,
  title={Time-memory Trade-offs Sound the Death Knell for GPRS and GSM},
  publisher={Springer-Verlag},
  author={Tristan Claverie and Gildas Avoine and Diane Leblanc-Albarel and Xavier Carpent and Christope Devine},
  year=2024
}

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