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Automatic Search for Key-Bridging Technique: Applications to LBlock and TWINE (Full Version)
Block Ciphers Key-Bridging Technique Automatic Search
2016/5/3
Key schedules in block ciphers are often highly simplified, which causes weakness that can be exploited in many attacks. At ASIACRYPT 2011, Dunkelman et al. proposed a technique using the weakness in ...
Impossible differential cryptanalysis of LBlock with concrete investigation of key scheduling algorithm
Impossible differential cryptanalysis key recovery attack
2016/1/23
Impossible differential cryptanalysis has been proved to be one of the most powerful techniques to attack block ciphers. Based on the impossible differential paths, we can usually add several rounds...
Improved Impossible Differential Attacks against Round-Reduced LBlock
block ciphers impossible differential attacks LBlock
2016/1/23
Impossible differential attacks are among the most powerful forms of cryptanalysis against block ciphers. We present in this paper an in-depth complexity analysis of these attacks. We show an unifie...
Scrutinizing and Improving Impossible Differential Attacks: Applications to CLEFIA, Camellia, LBlock and Simon (Full Version)
block ciphers impossible differential attacks CLEFIA
2016/1/7
Impossible differential cryptanalysis has shown to be a very powerful form of cryptanalysis against
block ciphers. These attacks, even if extensively used, remain not fully understood because of thei...
Automatic Security Evaluation for Bit-oriented Block Ciphers in Related-key Model: Application to PRESENT-80, LBlock and Others
Mixed-integer Linear Programming Logical condition modelling
2014/3/6
Since AES and PRESENT are two international standard block ciphers representing the most elegant design strategies for byte-oriented and bit-oriented designs respectively, we regard AES and PRES\-ENT ...
In this paper, we propose a new lightweight block cipher called LBlock. Similar to many other lightweight block ciphers, the block size of LBlock is 64-bit and the key size is 80-bit.
In this paper, we propose a new lightweight block cipher called LBlock. Similar to many other lightweight block ciphers, the block size of LBlock is 64-bit and the key size is 80-bit. Our security eva...