IACR News item: 28 February 2015
Tomer Ashur, Bart Mennink
ePrint Report
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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