Publicaties

In this paper we introduce the strictly zero-correlation attack. We extend the work of Ashur and Posteuca in BalkanCryptSec 2018 and build a 0-correlation key-dependent linear trail covering the full DES. We show how this approximation can be used for a key recovery attack and empirically verify our claims through a series of experiments. To the best of our knowledge, this paper is the first to use this kind of property to leverage a meaningful ...

Rotational-XOR cryptanalysis is a cryptanalytic method aimed at finding distinguishable statistical properties in ARX-C ciphers, i.e., ciphers that can be described only using modular addition, cyclic rotation, XOR, and the injection of constants. In this paper we extend RX-cryptanalysis to AND-RX ciphers, a similar design paradigm where the modular addition is replaced by vectorial bitwise AND; such ciphers include the block cipher families ...

In this paper we generalize the Markov theory with respect to a relation between two plaintexts and not their difference and apply it for rotational pairs. We perform a related-key attack over Chaskey- a lightweight MAC algorithm for 32-bit micro controllers - and find a distinguisher by using rotational probabilities. Having a message m we can forge and present a valid tag for some message under a related key with probability \(2^{-57}\) for 8 ...