Differential and Rotational Cryptanalysis of Round-reduced MORUS

Ashutosh Dhar Dwivedi, Pawel Morawiecki, Sebastian Wójtowicz

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Abstract

In this paper we investigate the security margin of MORUS-an authenticated cipher taking part in the CAESAR competition. We propose a new key recovery approach, which can be seen as an accelerated exhaustive search. We also verify the resistance of MORUS against internal differential and rotational cryptanalysis. Our analysis reveals that the cipher has a solid security margin and a lack of round constants does not bring any weakness. Our work helps to reliably evaluate this new, high-performance algorithm, which is particularly important in the context of the ongoing CAESAR competition.

Original languageEnglish
Title of host publicationProceedings of the 14th International Joint Conference on e-Business and Telecommunications (ICETE 2017) : Volume 4: SECRYPT
EditorsPierangela Samarati, Mohammad S. Obaidat, Enrique Cabello
Number of pages10
PublisherSCITEPRESS Digital Library
Publication date2017
Pages275-284
ISBN (Electronic)9789897582592
DOIs
Publication statusPublished - 2017
Externally publishedYes
Event14th International Joint Conference on e-Business and Telecommunications. ICETE 2017 - Madrid, Spain
Duration: 24 Jul 201726 Jul 2017
Conference number: 14

Conference

Conference14th International Joint Conference on e-Business and Telecommunications. ICETE 2017
Number14
Country/TerritorySpain
CityMadrid
Period24/07/201726/07/2017
SponsorInstitute for Systems and Technologies of Information, Control and Communication, Object Management Group, The Foundation for Intelligent Physical Agents, Workflow Management Coalition
SeriesProceedings of the 14th International Joint Conference on e-Business and Telecommunications (ICETE 2017)
Volume4
ISSN2184-2825

Keywords

  • Authenticated Encryption
  • MORUS
  • Rotational Cryptanalysis
  • Internal Differential Cryptanalysis
  • CAESAR Competition

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