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Paper 2006/269

An Analysis of the Hermes8 Stream Ciphers

Steve Babbage and Carlos Cid and Norbert Pramstaller and Havard Raddum

Abstract

Hermes8 is one of the stream ciphers submitted to the ECRYPT Stream Cipher Project (eSTREAM). 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.

Note: Updated version presented at ACISP 2007.

Metadata
Available format(s)
PDF PS
Publication info
Published elsewhere. Presented at ACISP 2007.
Keywords
Hermes8Stream CipherCryptanalysis.
Contact author(s)
carlos cid @ rhul ac uk
History
2007-06-28: revised
2006-08-15: received
See all versions
Short URL
https://ia.cr/2006/269
License
Creative Commons Attribution
CC BY
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