Cryptology ePrint Archive: Report 2004/253
Design Principles for Iterated Hash Functions
Abstract: This paper deals with the security of iterated hash functions against
generic attacks, such as, e.g., Joux' multicollision attacks from Crypto 04. The core idea is to increase the size of the internal state
of an n-bit hash function to w > n bit. Variations of this core idea allow the use of a compression function with n output bits, even if the compression function itself is based on a block cipher.
In a formal model, it is shown that these modifications quantifiably
improve the security of iterated hash functions against generic attacks.
Category / Keywords: secret-key cryptography /
Publication Info: hash function, Joux attack, provable security, black-box model
Date: received 28 Sep 2004
Contact author: lucks at th informatik uni-mannheim de
Available formats: PDF | BibTeX Citation
Version: 20040929:003615 (All versions of this report)
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