Paper 2010/066

Some Observations on TWIS Block Cipher

Bozhan Su, Wenling Wu, Lei Zhang, and Yanjun Li

Abstract

The 128-bit block cipher TWIS was proposed by Ojha et al in 2009. It is a lightweight block cipher and its design is inspired from CLEFIA. In this paper, we first study the properties of TWIS structure, and as an extension we also considered the generalized TWIS-type structure which can be called G-TWIS cipher, where the block size and round number can be arbitrary values. Then we present a series of 10-round differential distinguishers for TWIS and a n-round differential distinguisher for G-TWIS whose probabilities are all equal to 1. Therefore, by utilizing these kinds of differential distinguishers, we can break the full 10-round TWIS cipher and n-round G-TWIS cipher.

Note: There are some words in Acknowledgment inappropriate, so i delete Acknowledgment. It is my reason for revision.

Metadata
Available format(s)
PDF
Category
Secret-key cryptography
Publication info
Published elsewhere. Unknown where it was published
Keywords
Block CipherTWISG-TWISDifferential DistinguisherDifferential Cryptanalysis.
Contact author(s)
subozhan @ is iscas ac cn
History
2010-02-09: revised
2010-02-08: received
See all versions
Short URL
https://ia.cr/2010/066
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2010/066,
      author = {Bozhan Su and Wenling Wu and Lei Zhang and Yanjun Li},
      title = {Some Observations on TWIS Block Cipher},
      howpublished = {Cryptology ePrint Archive, Paper 2010/066},
      year = {2010},
      note = {\url{https://eprint.iacr.org/2010/066}},
      url = {https://eprint.iacr.org/2010/066}
}
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