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.
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.
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|Item Type:||Journal Article|
|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|
|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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