Improved Collision Attack on Hash Function MD5
نویسندگان
چکیده
منابع مشابه
Improved Collision Attack on MD5
In EUROCRYPT2005, a collision attack on MD5 was proposed by Wang et al. In this attack, conditions which are sufficient to generate collisions (called “sufficient condition”) are introduced. This attack raises the success probability by modifing messages to satisfy these conditions. In this attack, 37 conditions cannot be satisfied even messages are modified. Therefore, the complexity is 2. Aft...
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In this paper, we present an improved attack algorithm to find two-block collisions of the hash function MD5. The attack uses the same differential path of MD5 and the set of sufficient conditions that was presented by Wang et al. We present a new technique which allows us to deterministically fulfill restrictions to properly rotate the differentials in the first round. We will present a new al...
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We give a method that appears to be able to find colliding messages for the Waterfall hash function with approximately O(2) work for all hash sizes. If correct, this would show that the Waterfall hash function does not meet the required collision resistance.
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So far, two different 2-block collision differentials, both with 3-bit input differences for MD5, have been found by Wang etc in 2005 and Xie etc in 2008 respectively, and those differentials have been improved later on to generate a collision respectively within around one minute and half an hour on a desktop PC. Are there more collision differentials for MD5? Can a more efficient algorithm be...
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In 2010, Tao Xie and Dengguo Feng [XF10] constructed the first single-block collision for MD5 consisting of two 64-byte messages that have the same MD5 hash. Details of their attack, developed using what they call an evolutionary approach, has not been disclosed “for security reasons”. Instead they have posted a challenge to the cryptology community to find a new different single-block collisio...
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ژورنال
عنوان ژورنال: Journal of Computer Science and Technology
سال: 2007
ISSN: 1000-9000,1860-4749
DOI: 10.1007/s11390-007-9010-1