CLOCK CONTROL SEQUENCE RECONSTRUCTION IN THE GENERALIZED SHRINKING GENERATOR

Slobodan Petrović

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Paper

CLOCK CONTROL SEQUENCE RECONSTRUCTION IN THE GENERALIZED SHRINKING GENERATOR

Topics: Coding Theory and Practice; Spread Spectrum Systems

In Proceedings of the Second International Conference on Security and Cryptography - Volume 0ICETE, 259-262, 2007 , Barcelona, Spain

Author: Slobodan Petrović

Affiliation: Gjøvik University College, Norway

Keyword(s): Cryptanalysis, Shrinking generator, Edit distance, Correlation attack.

Related Ontology Subjects/Areas/Topics: Coding Theory and Practice ; Cryptographic Techniques and Key Management ; Information and Systems Security ; Spread Spectrum Systems

Abstract: An algorithm is presented that reconstructs the clock control sequence in the generalized shrinking generator in the presence of noise. The shrinking generator is first reduced to a step 1/step E generator, where E depends on the maximum length of runs of zeros in the output sequence of its clocking part. Then a directed depth-first like search for optimal and suboptimal paths in the edit distance matrix corresponding to the generator is performed. The permitted path weight deviation from the optimum is determined by the noise level in the statistical model of the generator. Since the algorithm is deterministic, the correct clock control sequence is guaranteed to be found, unlike many known algorithms of this kind. Experimental results show that the algorithm converges to the correct solution relatively fast even if the noise level is high.

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Paper citation in several formats:

Petrović, S. (2007). CLOCK CONTROL SEQUENCE RECONSTRUCTION IN THE GENERALIZED SHRINKING GENERATOR. In Proceedings of the Second International Conference on Security and Cryptography (ICETE 2007) - SECRYPT; ISBN 978-989-8111-12-8; ISSN 2184-3236, SciTePress, pages 259-262. DOI: 10.5220/0002118402590262

@conference{secrypt07,
author={Slobodan Petrović.},
title={CLOCK CONTROL SEQUENCE RECONSTRUCTION IN THE GENERALIZED SHRINKING GENERATOR},
booktitle={Proceedings of the Second International Conference on Security and Cryptography (ICETE 2007) - SECRYPT},
year={2007},
pages={259-262},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0002118402590262},
isbn={978-989-8111-12-8},
issn={2184-3236},
}

TY - CONF

JO - Proceedings of the Second International Conference on Security and Cryptography (ICETE 2007) - SECRYPT
TI - CLOCK CONTROL SEQUENCE RECONSTRUCTION IN THE GENERALIZED SHRINKING GENERATOR
SN - 978-989-8111-12-8
IS - 2184-3236
AU - Petrović, S.
PY - 2007
SP - 259
EP - 262
DO - 10.5220/0002118402590262
PB - SciTePress