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Improved Linear Cryptanalysis of Reduced-Round MIBS

  • Aslı Bay
  • Jialin Huang
  • Serge Vaudenay
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8639)

Abstract

MIBS is a 32-round lightweight block cipher with 64-bit block size and two different key sizes, namely 64-bit and 80-bit keys. Bay et al. provided the first impossible differential, differential and linear cryptanalyses of MIBS. Their best attack was a linear attack on the 18-round MIBS-80. In this paper, we significantly improve their attack by discovering more approximations and mounting Hermelin et al.’s multidimensional linear cryptanalysis. We also use Nguyen et al.’s technique to have less time complexity. We attack on 19 rounds of MIBS-80 with a time complexity of 274.23 19-round MIBS-80 encryptions by using 257.87 plaintext-ciphertext pairs. To the best of our knowledge, the result proposed in this paper is the best cryptanalytic result for MIBS, so far.

Keywords

multidimensional linear cryptanalysis lightweight block ciphers MIBS RFID tags sensor networks 

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Aslı Bay
    • 1
  • Jialin Huang
    • 1
    • 2
  • Serge Vaudenay
    • 1
  1. 1.EPFLSwitzerland
  2. 2.Shanghai Jiao Tong UniversityChina

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