Paper 2006/438 Original: eprint.iacr.org/2006/438 ↗

On the pseudo-random generator ISAAC

Jean-Philippe Aumasson
Abstract

This paper presents some properties of he deterministic random bit generator ISAAC (FSE'96), contradicting several statements of its introducing article. In particular, it characterizes huge subsets of internal states which induce a strongly non-uniform distribution in the $8\,192$ first bits produced. A previous attack on ISAAC presented at Asiacrypt'06 by Paul and Preneel is demonstrated to be non relevant, since relies on an erroneous algorithm. Finally, a modification of the algorithm is proposed to fix the weaknesses discovered.

Metadata
Available format(s)
PDF
Publication info
Preprint.
History
2007-01-03: last updated
2006-11-24: published
Short URL
https://ia.cr/2006/438
License
https://creativecommons.org/licenses/by/4.0/

BibTeX

@misc{cryptoeprint:2006/438,
      author = {Jean-Philippe Aumasson},
      title = {On the pseudo-random generator ISAAC},
      howpublished = {Cryptology {ePrint} Archive, Paper 2006/438},
      year = {2006},
      url = {https://eprint.iacr.org/2006/438}
}
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