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Title:
The Problem of Half Round Key XOR
Authors: Anubhab Baksi
Abstract:In the design of GIFT, half round key XOR is used. This leads to the undesired consequence that the security against the differential/linear attacks are overestimated. This comes from the observation that; in the usual DDT/LAT based analysis of the differential/linear attacks, the inherent assumption is the full round key is XORed at each round.
ePrint: https://eprint.iacr.org/2023/730
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