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Ännu fler md5-attacker » Kryptoblog

Ännu fler md5-attacker

March 21st, 2006 by Joachim Strömbergson Leave a reply »

På konferensen Fast Software Encytption 2006 (FSE 2006) som hölls i Graz i förra veckan presenterades ännu fler attacker mot MD5.

John Black, Martin Cochran och Trevor Highland presenterade artikeln A Study of the MD5 Attacks: Insights and Improvements. Enligt sammanfattningen för artikeln beskriver föfattarna:

MD5 is a well-known and widely-used cryptographic hash function. It has received renewed attention from researchers subsequent to the recent announcement of collisions found by Wang et al. To date, however, understanding the method used by researchers in this work has been fairly difficult to grasp. In this paper we conduct a study of all attacks on MD5 starting from Wang. We explain the techniques used by her team, give insights on how to improve these techniques, and use these insights to produce an even faster attack on MD5. Additionally, we provide an “MD5 Toolkit” implementing these improvements that we hope will serve as an open-source platform for further research. Our hope is that a better understanding of these attacks will lead to a better understanding of our current collection of hash functions, what their strengths and weaknesses are, and where we should direct future efforts in order to produce even stronger primitives.

Det toolkit dom pratar om finns att tanka ner för egna tester från John Blacks webbplats.

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