Journal article
New Second-Preimage Attacks on Hash Functions
Journal of Cryptology, Vol.29(4), pp.657-696
Oct/2016
Abstract
In this work, we present several new generic second-preimage attacks on hash functions. Our first attack is based on the herding attack and applies to various Merkle-DamgAyenrd-based iterative hash functions. Compared to the previously known long-message second-preimage attacks, our attack offers more flexibility in choosing the second-preimage message at the cost of a small computational overhead. More concretely, our attack allows the adversary to replace only a few blocks in the original target message to obtain the second preimage. As a result, our new attack is applicable to constructions previously believed to be immune to such second-preimage attacks. Among others, these include the dithered hash proposal of Rivest, Shoup's UOWHF, and the ROX constructions. In addition, we also suggest several time-memory-data tradeoff attack variants, allowing for a faster online phase, and even finding second preimages for shorter messages. We further extend our attack to sequences stronger than the ones suggested in Rivest's proposal. To this end we introduce the kite generator as a new tool to attack any dithering sequence over a small alphabet. Additionally, we analyse the second-preimage security of the basic tree hash construction. Here we also propose several second-preimage attacks and their time-memory-data tradeoff variants. Finally, we show how both our new and the previous second-preimage attacks can be applied even more efficiently when multiple short messages, rather than a single long target message, are available.
Details
- Title
- New Second-Preimage Attacks on Hash Functions
- Creators
- Elena Andreeva (null)Charles Bouillaguet (null)Orr Dunkelman (null) - 972WIS_INST___83Pierre-Alain Fouque (null)Jonathan Hoch (null)Adi Shamir (null) - 972WIS_INST___83John Kelsey (null)
- Resource Type
- Journal article
- Publication Details
- Journal of Cryptology, Vol.29(4), pp.657-696; Oct/2016
- Number of pages
- 40
- Language
- English
- DOI
- https://doi.org/10.1007/s00145-015-9206-4
- Grant note
- Research Council KU Leuven: GOA TENSE [GOA/11/007, OT/13/071]; IAP Program BCRYPT of the Belgian State (Belgian Science Policy) [P6/26]; European Commission through the ICT program [ICT-2007-216676 ECRYPT II]; Flemish Research Foundation (FWO-Vlaanderen); France Telecom Chair; ISF [827/12]_ALMAME_DELIMITER_
- Record Identifier
- 993266598503596
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