Abstract
Tiger is a cryptographic hash function with a 192-bit hash value which was proposed by Anderson and Biham in 1996. At FSE 2006, Kelsey and Lucks presented a collision attack on Tiger reduced to 16 (out of 24) rounds with complexity of about 244. Furthermore, they showed that a pseudo-near-collision can be found for a variant of Tiger with 20 rounds with complexity of about 248.
In this article, we show how their attack method can be extended to construct a collision in the Tiger hash function reduced to 19 rounds. We present two different attack strategies for constructing collisions in Tiger-19 with complexity of about 262 and 269. Furthermore, we present a pseudo-near-collision for a variant of Tiger with 22 rounds with complexity of about 244.
Keywords
- cryptanalysis
- hash functions
- differential attack
- collision
- near-collision
- pseudo-collision
- pseudo-near-collision
This work was supported in part by the Austrian Science Fund (FWF), project P18138. This work was supported in part by a consignment research from the National Institute on Information and Communications Technology (NiCT), Japan. This work was supported in part by the Concerted Research Action (GOA) Ambiorics 2005/11 of the Flemish Government.
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References
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Mendel, F., Preneel, B., Rijmen, V., Yoshida, H., Watanabe, D. (2006). Update on Tiger. In: Barua, R., Lange, T. (eds) Progress in Cryptology - INDOCRYPT 2006. INDOCRYPT 2006. Lecture Notes in Computer Science, vol 4329. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11941378_6
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DOI: https://doi.org/10.1007/11941378_6
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-49767-7
Online ISBN: 978-3-540-49769-1
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