[Resource Topic] 2006/438: On the pseudo-random generator ISAAC

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Title:
On the pseudo-random generator ISAAC

Authors: 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.

ePrint: https://eprint.iacr.org/2006/438

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