On the (in)security of IDEA in various hashing modes

Wei, Lei, Peyrin, Thomas, Sokołowski, Przemysław, San, Ling, Pieprzyk, Josef, & Wang, Huaxiong (2012) On the (in)security of IDEA in various hashing modes. Lecture Notes in Computer Science : Fast Software Encryption, 7549, pp. 163-179.

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Abstract

In this article, we study the security of the IDEA block cipher when it is used in various simple-length or double-length hashing modes. Even though this cipher is still considered as secure, we show that one should avoid its use as internal primitive for block cipher based hashing. In particular, we are able to generate instantaneously free-start collisions for most modes, and even semi-free-start collisions, pseudo-preimages or hash collisions in practical complexity. This work shows a practical example of the gap that exists between secret-key and known or chosen-key security for block ciphers. Moreover, we also settle the 20-year-old standing open question concerning the security of the Abreast-DM and Tandem-DM double-length compression functions, originally invented to be instantiated with IDEA. Our attacks have been verified experimentally and work even for strengthened versions of IDEA with any number of rounds.

Impact and interest:

4 citations in Scopus
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ID Code: 70089
Item Type: Journal Article
Refereed: Yes
Additional Information: 19th International Workshop, FSE 2012, Washington, DC, USA, March 19-21, 2012. Revised Selected Papers
Keywords: IDEA , Block cipher, Hash function, Cryptanalysis, Collision, Preimage
DOI: 10.1007/978-3-642-34047-5_10
ISSN: 0302-9743
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Springer-Verlag Berlin Heidelberg
Deposited On: 11 Apr 2014 01:27
Last Modified: 17 Jul 2014 00:19

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