DagSemProc.07021.3.pdf
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A Collision-Resistant Rate-1 Double-Block-Length Hash Function
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Dagstuhl Seminar Proceedings, Volume 7021
Series: Dagstuhl Seminar Proceedings (DagSemProc) - License:
Creative Commons Attribution 4.0 International license
- Publication Date: 2007-06-06
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Stefan Lucks. A Collision-Resistant Rate-1 Double-Block-Length Hash Function. In Symmetric Cryptography. Dagstuhl Seminar Proceedings, Volume 7021, pp. 1-14, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2007)
https://doi.org/10.4230/DagSemProc.07021.3
https://doi.org/10.4230/DagSemProc.07021.3
Abstract
This paper proposes a construction for collision resistant
$2n$-bit hash functions, based
on $n$-bit block ciphers with $2n$-bit keys. The construction is analysed
in the ideal cipher model; for $n=128$ an adversary would need roughly
$2^{122}$ units of time to find a collision.
The construction employs ``combinatorial'' hashing
as an underlying building block (like
Universal Hashing for cryptographic
message authentication by Wegman and Carter).
The construction runs at rate~1, thus improving on a similar
rate~1/2 approach by Hirose (FSE 2006).
Keywords
- Hash function
- provable security
- double-block-length
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