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Trivial Nonce-Misusing Attack on Pure OMD
Authors: Tomer Ashur, Bart MenninkAbstract:
Pure OMD is an authenticated encryption mode that will be presented by Reyhanitabar et al. at FSE 2015. It is (among others) claimed to achieve authenticity against nonce-misusing adversaries. We show that this claim is incorrect, by presenting an adversary that makes 3 queries (including the forgery) of a total complexity 6.
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