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Title:
Quantum Attacks on HCTR and its Variants
Authors: Mostafizar Rahman, Goutam Paul
Abstract:Recently, in Asiacrypt 2019, Bonnetain et. al have shown attacks by quantum adversaries on FX construction and Even-Mansour Cipher without using superposition queries to the encryption oracle. In this work, we use a similar approach to mount new attacks on HCTR and HCH construction. In addition, we mount attacks on HCTR, Tweakable-HCTR and HCH using the superposition queries to the encryption oracle using strategies proposed by Leander and May in Asiacrypt 2017 and Kaplan et. al in Crypto 2016.
ePrint: https://eprint.iacr.org/2020/802
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