### Full-Round Differential Attack on DoT Block Cipher

Manoj Kumar

##### Abstract

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)
Category
Secret-key cryptography
Publication info
Preprint. MINOR revision.
Keywords
Block CipherLightweight Block CipherDifferential CryptanalysisBranch-and-bound Algorithm
Contact author(s)
manojkumar @ sag drdo in
History
Short URL
https://ia.cr/2019/1285

CC BY

BibTeX

@misc{cryptoeprint:2019/1285,
author = {Manoj Kumar},
title = {Full-Round Differential Attack on DoT Block Cipher},
howpublished = {Cryptology ePrint Archive, Paper 2019/1285},
year = {2019},
note = {\url{https://eprint.iacr.org/2019/1285}},
url = {https://eprint.iacr.org/2019/1285}
}

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