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Title : Strengthening Digital Signatures via Randomized Hashing
Author(s) : S. Halevi, H. Krawczyk
Filename : draft-irtf-cfrg-rhash-01.txt
Pages : 12
Date : 2007-10-23
This document describes a randomized hashing scheme consisting of a
simple message randomization transform that when used as a front-end
to regular hash-then-sign signature schemes, such as RSA and DSS,
frees these signatures from their current vulnerability to off-line
collision attacks against the underlying hash function. The proposed
mechanism can work with any hash function as-is and requires no
change to the underlying signature algorithm. Incorporating this
mechanism into existing applications requires changes that are
comparable in their complexity to accommodating a new (deterministic)
hash function such as SHA-256.
Visit http://www.ee.technion.ac.il/~hugo/rhash/ for more information
and updates on this work.
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