Near-Collision Attack and Collision-Attack on Double Block Length Compression Functions based on the Block Cipher IDEA

Donghoon Chang

Paper 2006/478

Near-Collision Attack and Collision-Attack on Double Block Length Compression Functions based on the Block Cipher IDEA

Donghoon Chang

Abstract

IDEA is a block cipher designed by Xuejia Lai and James L. Massey and was first described in 1991. IDEA does not vary the constant in its key schedule. In \cite{ChYu06}, Donghoon Chang and Moti Yung showed that there may be a weakness of hash function based on block cipher whose key schedule does not use various constants. Based on their result, we investigate the security of double block length compression functions based on the block cipher IDEA such that the key size of IDEA is 128 bits and its block length is 64 bits. We use the double block length hash functions proposed by Shoichi Hirose in the second hash workshop in 2006 \cite{Hirose06}. Then, we can easily find a near-collision by hand. And also, for a constant $c$ of DBL hash functions, we can find a collision by hand. This means that the constant $c$ may be used as a trapdoor to make the attacker find collision easily.

Metadata

Available format(s): PDF PS
Publication info: Published elsewhere. Unknown where it was published
Keywords: Hash Function Collision Attack Near Collision Attack Block Cipher Double Block Length Hash Function Constant IDEA.
Contact author(s): pointchang @ gmail com
History: 2006-12-24: revised; 2006-12-24: received; See all versions
Short URL: https://ia.cr/2006/478
License: CC BY

BibTeX

@misc{cryptoeprint:2006/478,
      author = {Donghoon Chang},
      title = {Near-Collision Attack and Collision-Attack on Double Block Length Compression Functions based on the Block Cipher {IDEA}},
      howpublished = {Cryptology {ePrint} Archive, Paper 2006/478},
      year = {2006},
      url = {https://eprint.iacr.org/2006/478}
}