On the collision resistance of RIPEMD-160

Authors:
Florian Mendel;Norbert Pramstaller;Christian Rechberger;Vincent Rijmen
Affiliations:
Institute for Applied Information Processing and Communications (IAIK), Graz University of Technology, Austria;Institute for Applied Information Processing and Communications (IAIK), Graz University of Technology, Austria;Institute for Applied Information Processing and Communications (IAIK), Graz University of Technology, Austria;Institute for Applied Information Processing and Communications (IAIK), Graz University of Technology, Austria
Venue:
ISC'06 Proceedings of the 9th international conference on Information Security
Year:
2006

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Abstract

In this article, the RIPEMD-160 hash function is studied in detail. To analyze the hash function, we have extended existing approaches and used recent results in cryptanalysis. While RIPEMD and RIPEMD-128 reduced to 3 rounds are vulnerable to the attack, it is not feasible for RIPEMD-160. Furthermore, we present an analytical attack on a round-reduced variant of the RIPEMD-160 hash function. To the best of our knowledge this is the first article that investigates the impact of recent advances in cryptanalysis of hash functions on RIPEMD-160.