Abstract
In this article, we present an improved collision attack on the hash function proposed by Shin et al. at PKC’98. The attack has a complexity of about 220.5 hash computations, while the previous attack of Chang et al. presented at SAC 2002 has a complexity of about 237.13 hash computations. In the analysis of the hash function we combined existing approaches with recent results in cryptanalysis of hash functions. We show that message-dependent rotations can be exploited to construct collisions. The weak design of the step function facilitates high-probability multi-block collisions.
The work described in this paper has been supported in part by the European Commission through the IST Programme under contract IST-2002-507 932 ECRYPT. The information in this paper is provided as is, and no guarantee or warranty is given or implied that the information is fit for any particular purpose. The user thereof uses the information at its sole risk and liability.
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Mendel, F., Pramstaller, N., Rechberger, C. (2006). Improved Collision Attack on the Hash Function Proposed at PKC’98. In: Rhee, M.S., Lee, B. (eds) Information Security and Cryptology – ICISC 2006. ICISC 2006. Lecture Notes in Computer Science, vol 4296. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11927587_3
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DOI: https://doi.org/10.1007/11927587_3
Publisher Name: Springer, Berlin, Heidelberg
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