



@article {3201,
	title = {Post-Quantum Security of the (Tweakable) FX Construction, and Applications},
	year = {2022},
	month = {8/29/2022},
	abstract = {<p>The FX construction provides a way to increase the effective key length of a block cipher E. We prove security of a tweakable version of the FX construction in the post-quantum setting, i.e., against a quantum attacker given only classical access to the secretly keyed construction while retaining quantum access to E, a setting that seems to be the most relevant one for real-world applications. We then use our results to prove post-quantum security\&mdash;in the same model\&mdash;of the (plain) FX construction, Elephant (a finalist of NIST\&$\#$39;s lightweight cryptography standardization effort), and Chaskey (an ISO-standardized lightweight MAC</p>},
	url = {https://eprint.iacr.org/2022/1097},
	author = {Gorjan Alagic and Chen Bai and Jonathan Katz and Christian Majenz and Patrick Struck}
}
