Welcome to the resource topic for 2005/292
Title:
Improved Integral Cryptanalysis of FOX Block Cipher
Authors: Wu Wenling, Zhang Wentao, Feng Dengguo
Abstract:FOX is a new family of block ciphers presented recently, which is
based upon some results on proven security and has high
performances on various platforms. In this paper, we construct
some distinguishers between 3-round FOX and a random permutation
of the blocks space. By using integral attack and
collision-searching techniques, the distinguishers are used to
attack on 4, 5, 6 and 7-round of FOX64, 4 and 5-round FOX128. The
attack is more efficient than previous integral attack on FOX. The
complexity of improved integral attack is 2^{77.6} on 4-round
FOX128, 2^{205.6} against 5-round FOX128 respectively. For
FOX64, the complexity of improved integral attack is 2^{45.4} on
4-round FOX64, 2^{109.4} against 5-round FOX64, 2^{173.4}
against 6-round FOX64, 2^{237.4} against 7-round FOX64
respectively. Therefore, 4-round FOX64/64, 5-round FOX64/128,
6-round FOX64/192, 7-round FOX64/256 and 5-round FOX128/256 are
not immune to the attack in this paper.
ePrint: https://eprint.iacr.org/2005/292
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