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Paper 2015/175

Trivial Nonce-Misusing Attack on Pure OMD

Tomer Ashur and Bart Mennink

Abstract

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.

Metadata
Available format(s)
PDF
Category
Secret-key cryptography
Publication info
Preprint. MINOR revision.
Keywords
authenticated encryptionpOMD
Contact author(s)
bart mennink @ esat kuleuven be
History
2015-02-28: received
Short URL
https://ia.cr/2015/175
License
Creative Commons Attribution
CC BY
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