Paper 2019/1285

Full-Round Differential Attack on DoT Block Cipher

Manoj Kumar


The lightweight encryption design DoT was published by Patil et al in 2019. It is based on SPN (substitution permutation network) structure. Its block and key size are 64-bit and 128-bit respectively. In this paper, we analyse the security of DoT against differential attack and present a series of differential distinguishers for full-round DOT. Our analysis proves that DoT we can be distinguished from a random permutation with probability equal to 2^62. Diffusion layer of DoT is a combination of byte shuffling, 8-P permutation, 32-bit word shuffling and circular shift operations. We analyse the security of DoT with and without 8-P permutation in its diffusion layer. Our results indicate that DoT provides better resistance to differential attack without using the 8-P permutation.

Available format(s)
Secret-key cryptography
Publication info
Preprint. MINOR revision.
Block CipherLightweight Block CipherDifferential CryptanalysisBranch-and-bound Algorithm
Contact author(s)
manojkumar @ sag drdo in
2019-11-07: received
Short URL
Creative Commons Attribution


      author = {Manoj Kumar},
      title = {Full-Round Differential Attack on DoT Block Cipher},
      howpublished = {Cryptology ePrint Archive, Paper 2019/1285},
      year = {2019},
      note = {\url{}},
      url = {}
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