Семинар на секция “Математически основи на информатиката”
Институт по математика и информатика - БАН Block 8, 1113 БАН IV км., СофияСекция “Математически основи на информатиката” към ИМИ - БАН, Ви кани на поредната сбирка на семинара си, на която Лилия Кралева, Catholic University of Leuven, ще изнесе доклад на тема: Rotation cryptanalysis on Chaskey. Резюме. Rotational cryptanalysis is a probabilistic technique mainly used over ARX cryptographic structures. After encryption, if the outputs also form a rotational pair with probability more than for a random permutation we can use that as a distinguisher. Chaskey is a lightweight MAC algorithm for 32-bit microcontrollers. Its underlying block cipher has a permutation using only XOR, rotation and modular addition as operations. We perform a related key attack over Chaskey and find a distinguisher by using rotational probabilities. Having a message we can forge and present a valid tag for that message [...]
