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International Conference on Global e-Security

ICGeS 2008: Global E-Security pp 182–189Cite as

Improved Results on Algebraic Cryptanalysis of A5/2

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Part of the book series: Communications in Computer and Information Science ((CCIS,volume 12))

Abstract

Algebraic analysis of A5/2, the weaker version of GSM encryption algorithm, is presented in this article. We have enhanced existing cryptanalysis of A5/2 in terms of data requirement. Experimental results using an implementation of Groebner basis algorithm are presented. It has been found that state bits of the cipher can be recovered in fewer number of data frames than required in a previous efficient attack against GSM communication. Number of data frames required for both known-plaintext and ciphertext-only attacks can be reduced if linearization is replaced by Groebner basis technique without changing the time complexity of attack.

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Author information

Authors and Affiliations

  1. College of Signals, National University of Science and Technology, Pakistan

    Mehreen Afzal & Ashraf Masood

  2. College of Aeronautical Engineering, National University of Science and Technology, Pakistan

    Naveed Shehzad

Authors
  1. Mehreen Afzal
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  2. Ashraf Masood
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  3. Naveed Shehzad
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Editor information

Editors and Affiliations

  1. School of Computing Science, The Burroughs, Middlesex University, NW4 4BT, London, UK

    Hamid Jahankhani

  2. Harrow School of Computer Science, University of Westminster, Watford Road, HA1 3TP, Harrow, UK

    Kenneth Revett

  3. School of Computing and Technology, University of East London, University Way, E16 2RD, London, UK

    Dominic Palmer-Brown

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© 2008 Springer-Verlag Berlin Heidelberg

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Afzal, M., Masood, A., Shehzad, N. (2008). Improved Results on Algebraic Cryptanalysis of A5/2. In: Jahankhani, H., Revett, K., Palmer-Brown, D. (eds) Global E-Security. ICGeS 2008. Communications in Computer and Information Science, vol 12. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-69403-8_22

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  • DOI: https://doi.org/10.1007/978-3-540-69403-8_22

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-69402-1

  • Online ISBN: 978-3-540-69403-8

  • eBook Packages: Computer ScienceComputer Science (R0)

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