Diferencijalna kriptoanaliza

master's thesis

• Author: Leonora Gašpar
• Mentor: Andrej Dujella (mentor)
• Committee member: Andrej Dujella (predsjednik povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Mathematics); Zagreb
• Defense date and country: 2016-07-13, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Mathematics

Abstract

U ovom radu obrađeni su napadi diferencijalnom kriptoanalizom na neke inačice DES-a i FEAL. Diferencijalna kriptoanaliza je oblik kriptoanalize primjenjiv prvenstveno na blokovne kriptosustave, no također i kriptografske hash funkcije. U slučaju blokovnih kriptosustava odnosi se na skup tehnika za praćenje razlika kroz niz transformacija, otkrivanje mjesta gdje šifrat pokazuje ne-nasumično ponašanje i iskorištavanje takvih svojstava u svrhu otkrivanja tajnog ključa. Prvo poglavlje opisuje te tehnike i pojmove, a primjenu obrađujemo u iduća dva poglavlja. U drugom poglavlju promatramo napade na razne varijante DES-a a u trećem poglavlju napad na FEAL.

Abstract (english)

In this paper we study the attacks on some variants of DES and FEAL. Differential cryptanalysis is a form of cryptanalysis applicable primarily to the block cryptsystems but also can be used to decipher cryptographic hash functions. When used to attack a block cipher, it consists of a set of techniques for tracking the differences through the series of transformations, looking for places where the cipher exhibits non-random behavior, and using such properties in order to reveal the secret key. The first chapter describes those techniques and in the following two chapters we apply them on DES and FEAL.

• Keywords: diferencijalna kriptoanaliza; DES; FEAL; blokovni kriptosustavi; kriptografske hash funkcije
• Keywords (english): differential cryptanalysis; DES; FEAL; block cryptsystems; cryptographic hash functions
• Language: croatian
• URN:NBN: urn:nbn:hr:217:882137
• Study programme: Title: Computer Science and Mathematics; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra računarstva i matematike (magistar/magistra računarstva i matematike)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-01-23 13:13:09