Results 221 to 230 of about 11,019 (249)
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Impossible Differential Attack on Reduced-Round TWINE
2014TWINE, proposed at the ECRYPT Workshop on Lightweight Cryptography in 2011, is a 64-bit lightweight block cipher consisting of 36 rounds with 80-bit or 128-bit keys. In this paper, we give impossible differential attacks on both versions of the cipher, which is an improvement over what the designers claimed to be the best possible. Although our results
Xuexin Zheng, Keting Jia
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Impossible Differential Attacks on Reduced-Round LBlock
2012LBlock is a lightweight block cipher with 32 rounds, which can be implemented efficiently not only in hardware environment but also in software platforms. In this paper, by exploiting the structure of LBlock and the redundancy in its key schedule, we propose an impossible differential attack on 21-round LBlock based on a 14-round impossible ...
Ya Liu 0001 +3 more
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New impossible differential attacks on reduced-round Crypton
Computer Standards & Interfaces, 2010Crypton is a 128-bit block cipher which was submitted to the Advanced Encryption Standard competition. In this paper, we present two new impossible differential attacks to reduced-round Crypton. Using two new observations on the diffusion layer of Crypton, exploiting a 4-round impossible differential, and appropriately choosing three additional rounds,
Hamid Mala +2 more
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Differential and Impossible Differential Related-Key Attacks on Hierocrypt-L1
2014Hierocrypt-L1 is one of the Japanese e-Government Recommended Ciphers listed by CRYPTREC in 2003, and its security was reconfirmed as secure by CRYPTREC in 2013. In this paper we first find differential characteristics with probability 1 in the key scheduling of Hierocrypt-L1.
Bungo Taga, Shiho Moriai, Kazumaro Aoki
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Impossible Differential Attack on 30-Round SHACAL-2
2003SHACAL-2 is a 256-bit block cipher with various key sizes based on the hash function SHA-2. Recently, it was recommended as one of the NESSIE selections. Up to now, no security flaws have been found in SHACAL-2. In this paper, we discuss the security of SHACAL-2 against an impossible differential attack.
Seokhie Hong +5 more
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Automatic Search of Meet-in-the-Middle and Impossible Differential Attacks
2016Tracking bits through block ciphers and optimizing attacks at hand is one of the tedious task symmetric cryptanalysts have to deal with. It would be nice if a program will automatically handle them at least for well-known attack techniques, so that cryptanalysts will only focus on finding new attacks.
Patrick Derbez, Pierre-Alain Fouque
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A Note on the Impossible Differential Attacks on Block Cipher SM4
2016 12th International Conference on Computational Intelligence and Security (CIS), 2016This paper first proves and extends the 12-round impossible differentials of block cipher SM4 given by Lu. Then we point out a few flaws in the previous 14-round impossible differentials and 17-/18-round impossible differential attacks. Finally, we propose a manner to optimize the impossible differential attack on SM4 using the existing impossible ...
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Improved Impossible Differential Attacks on Large-Block Rijndael
2008In this paper, we present some improved impossible differential attacks on large-block Rijndael whose block sizes are larger than 128 bits. First of all, we present some important observations which help us to significantly improve the impossible differential attacks on large-block Rijndael proposed by Nakahara-Pavao (ISC 2007).
Lei Zhang 0012 +4 more
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Improved Impossible Differential Attacks on Reduced-Round MISTY1
2012MISTY1 is a Feistel block cipher with a 64-bit block and a 128-bit key. It is one of the final NESSIE portfolio of block ciphers, and has been recommended for Japanese e-Government ciphers by the CRYPTREC project. In this paper, we improve the impossible differential attack on 6-round MISTY1 with 4 FL layers introduced by Dunkelman et al. with a factor
Keting Jia, Leibo Li
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Impossible Differential Attack on Reduced Round SPARX-64/128
2017SPARX-64/128 is an ARX-based block cipher with 64-bit block size and 128-bit key. It was published in ASIACRYPT 2016 as one of the instantiations of a family of ARX-based block ciphers with provable security against single-characteristic differential and linear cryptanalysis.
Ahmed Abdelkhalek 0001 +2 more
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