Distinguishers for the Compression Function and Output Transformation of Hamsi-256

Jean-Philippe Aumasson, Emilia Käsper, Lars Ramkilde Knudsen, Krystian Matusiewicz, Rune Ødegård, Thomas Peyrin, Martin Schläffer

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › peer-review

Abstract

Hamsi is one of 14 remaining candidates in NIST’s Hash Competition for the future hash standard SHA-3. Until now, little analysis has been published on its resistance to differential cryptanalysis, the main technique used to attack hash functions. We present a study of Hamsi’s resistance to differential and higher-order differential cryptanalysis, with focus on the 256-bit version of Hamsi. Our main results are efficient distinguishers and near-collisions for its full (3-round) compression function, and distinguishers for its full (6-round) finalization function, indicating that Hamsi’s building blocks do not behave ideally.
Original languageEnglish
Title of host publicationACISP
EditorsRon Steinfeld, Philip Hawkes
PublisherSpringer
Pages87-103
ISBN (Print)978-3-642-14080-8
DOIs
Publication statusPublished - 2010

Publication series

NameLecture Notes in Computer Science
Volume6168

Fields of Expertise

  • Information, Communication & Computing

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