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DTSTART;TZID=Europe/Sofia:20190704T140000
DTEND;TZID=Europe/Sofia:20190704T150000
DTSTAMP:20190625T074046Z
CREATED:20190625T074046Z
LAST-MODIFIED:20190625T074046Z
UID:7108-1562248800-1562252400@math.bas.bg
SUMMARY:Семинар на секция "Математически основи на информатиката"
DESCRIPTION:Секция “Математически основи на информатиката” към ИМИ – БАН\, \nВи кани на поредната сбирка на семинара си\, на която \nЛилия Кралева\, Catholic University of Leuven\, ще изнесе доклад на тема: \nRotation cryptanalysis on Chaskey. \nРезюме. 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 with  probability 2^{-64} for 8 rounds of the permutation. \nСеминарът ще се проведе на 4 юли 2019 г. от 15:00 часа в зала 503 на ИМИ-БАН.
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d1%81%d0%b5%d0%ba%d1%86%d0%b8%d1%8f-%d0%bc%d0%b0%d1%82%d0%b5%d0%bc%d0%b0%d1%82%d0%b8%d1%87%d0%b5%d1%81%d0%ba%d0%b8-%d0%be%d1%81%d0%bd%d0%be-8/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
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