AuthorsS. Babbage, C. Cid, N. Pramstaller and H. Raddum
TitleAn Analysis of the Hermes8 Stream Ciphers
Afilliation, Communication Systems
Project(s)Simula UiB
Publication TypeProceedings, refereed
Year of Publication2007
Conference Name12th Australasian Conference on Information Security and Privacy, ACISP 2007
Date Published08/2007
PublisherLecture Notes in Computer Science, Springer Verlag
ISBN Number978-3-540-73457-4
ISSN Number0302-9743
KeywordsCryptanalysis, Hermes8, Stream Cipher

Hermes8 [6,7] is one of the stream ciphers submitted to the ECRYPT Stream Cipher Project (eSTREAM [3]). In this paper we present an analysis of the Hermes8 stream ciphers. In particular, we show an attack on the latest version of the cipher (Hermes8F), which requires very few known keystream bytes and recovers the cipher secret key in less than a second on a normal PC. Furthermore, we make some remarks on the cipher’s key schedule and discuss some properties of ciphers with similar algebraic structure to Hermes8.

Citation Key24080

Contact person