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A Simple Attack on Some Clock-Controlled Generators

AutorCaballero-Gil, P.; Fúster-Sabater, A.
Palabras claveCryptanalysis
Stream Cipher
Edit Distance
Fecha de publicación1-jul-2009
CitaciónComputers and Mathematics with Applications
Serie58, No. 1
pp. 179-188
ResumenWe present a new approach to edit distance attacks on certain clock-controlled generators, which applies basic concepts of Graph Theory to simplify the search trees of the original attacks in such a way that only the most promising branches are analyzed. In particular, the proposed improvement is based on cut sets de ned on some graphs so that certain shortest paths provide the edit distances. The strongest aspects of the proposal are that the obtained results from the attack are absolutely deterministic, and that many inconsistent initial states of the target registers are recognized beforehand and avoided during search.
Versión del editorhttp://dx.doi.org/10.1016/j.camwa.2009.03.103
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