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Обращение 29-шаговой функции сжатия MD5 при помощи алгоритмов решения проблемы булевой выполнимости

Обращение 29-шаговой функции сжатия MD5 при помощи алгоритмов решения проблемы булевой выполнимости

Abstract

Криптографическая хеш-функция MD5 предложена в 1992 г. Ключевым компонентом MD5 является 64-шаговая функция сжатия. До сих пор не представляется возможным обратитв функцию сжатия MD5 за реалвное время, поэтому зачастую в данном контексте анализируются версии с сокращённым количеством шагов. В 2007 г. с помощвю алгоритмов решения проблемы булевой выполнимости (SAT) была обращена 26-шаговая функции сжатия MD5. В 2012 г. с помощвю SAT были обращены 27- и 28-шаговые версии. В настоящем исследовании предлагается подход к формированию 32 промежуточных задач обращения между парой после-дователвных шагов функции сжатия MD5. С помощвю этого подхода построены промежуточные задачи обращения между 28 и 29 шагами. Несколвко простых задач исполвзованы для параметризации современного SAT-решателя, в резулвтате чего впервые обращена 29-шаговая функция сжатия А 11)5.

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Keywords

MD5, алгоритм хеширования, проблема булевой выполнимости, криптографические хеш-функции, алгебраический криптоанализ, логический криптоанализ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green