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Title:
Quantum Key-Recovery on full AEZ
Authors: Xavier Bonnetain
Abstract:AEZ is an authenticated encryption algorithm, submitted to the CAESAR competition. It has been selected for the third round of the competition. While some classical analysis on the algorithm have been published, the cost of these attacks is beyond the security claimed by the designers. In this paper, we show that all the versions of AEZ are completely broken against a quantum adversary. For this, we propose a generalisation of Simon’s algorithm for quantum period finding that allows to build efficient attacks.
ePrint: https://eprint.iacr.org/2017/767
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