نتایج جستجو برای: impossible differential

تعداد نتایج: 320301  

Impossible differential attack is a well-known mean to examine robustness of block ciphers. Using impossible differ- ential cryptanalysis, we analyze security of a family of lightweight block ciphers, named Midori, that are designed considering low energy consumption. Midori state size can be either 64 bits for Midori64 or 128 bits for Midori128; however, both vers...

Journal: :Science China Information Sciences 2017

2001
Deukjo Hong Jaechul Sung Shiho Moriai Sangjin Lee Jongin Lim

We discuss the impossible differential cryptanalysis of the block cipher Zodiac [7]. The main design principles of Zodiac are simplicity and efficiency. However the diffusion layer in its round function is too simple to offer enough security. An impossible differential cryptanalysis is a proper method to attack the weakness of Zodiac. Our attack using two 14-round impossible characteristics der...

Journal: :IACR Cryptology ePrint Archive 2009
Zhongming Wu Xuejia Lai Bo Zhu Yiyuan Luo

Block ciphers are the very foundation of computer and information security. FOX, also known as IDEA NXT, is a family of block ciphers published in 2004 and is famous for its provable security to cryptanalysis. In this paper, we apply impossible differential cryptanalysis on FOX cipher. We find a 4-round impossible difference, by using which adversaries can attack 5, 6 and 7-round FOX64 with 2, ...

Journal: :IACR Cryptology ePrint Archive 2016
Zhan Chen Xiaoyun Wang

Midori is a light weight block cipher recently presented by Banik et al in ASIACRYPT 2015. There are two versions of Midori with state sizes of 64-bit and 128-bit respectively. The round function is based on Substitution-Permutation Network(SPN). In this paper, we give impossible differential cryptanalysis of Midori64. We studied the non-linear layer of the cipher and give two useful properties...

Journal: :IACR Cryptology ePrint Archive 2016
Patrick Derbez

While impossible di erential cryptanalysis is a well-known and popular cryptanalytic method, errors in the analysis are often discovered and many papers in the literature present aws. Wishing to solve that, Boura et al. [1] presented at ASIACRYPT'14 a generic vision of impossible di erential attacks with the aim of simplifying and helping the construction and veri cation of this type of cryptan...

2008
Yukiyasu Tsunoo Etsuko Tsujihara Maki Shigeri Teruo Saito Tomoyasu Suzaki Hiroyasu Kubo

This paper reports impossible differential cryptanalysis on the 128-bit block cipher CLEFIA that was proposed in 2007, including new 9-round impossible differentials for CLEFIA, and the result of an impossible differential attack using them. For the case of a 128-bit key, it is possible to apply the impossible differential attack to CLEFIA reduced to 12 rounds. The number of chosen plaintexts r...

Impossible differential cryptanalysis, the extension of differential cryptanalysis, is one of the most efficient attacks against block ciphers. This cryptanalysis method has been applied to most of the block ciphers and has shown significant results. Using structures, key schedule considerations, early abort, and pre-computation are some common methods to reduce complexities of this attack. In ...

Impossible difference attack is a powerful tool for evaluating the security of block ciphers based on finding a differential characteristic with the probability of exactly zero. The linear layer diffusion rate of a cipher plays a fundamental role in the security of the algorithm against the impossible difference attack. In this paper, we show an efficient method, which is independent of the qua...

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