[en] NIST is planning a call for a tweakable variable-input-length strong pseudorandom permutation (VIL-SPRP), coined as “an Accordion mode”. In this paper, we survey tweakable VIL constructions, specially focusing on those based on the Hash-Encrypt-Hash paradigm (including HCTR and similar designs) in terms of their applicability as an Accordion mode, and discuss their efficiency and shortcomings. Furthermore, we also introduce an improved version that achieves Beyond Birthday Bound (BBB) security.
Centre de recherche :
Interdisciplinary Centre for Security, Reliability and Trust (SnT) > CryptoLUX – Cryptography NCER-FT - FinTech National Centre of Excellence in Research
Disciplines :
Sciences informatiques
Auteur, co-auteur :
Hieu Nguyen Duy; Unilu - University of Luxembourg [LU] > SnT
Fernández, Pablo García; Unilu - University of Luxembourg [LU] > SnT
UDOVENKO, Aleksei ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > Cryptolux
BIRYUKOV, Alexei ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Computer Science (DCS) ; Unilu - University of Luxembourg [LU] > Interdisciplinary Centre for Security, Reliability and Trust (SnT) > CryptoLUX
Co-auteurs externes :
no
Langue du document :
Anglais
Titre :
Accordion mode based on Hash-Encrypt-Hash
Date de publication/diffusion :
2024
Nom de la manifestation :
NIST Workshop on the Requirements for an Accordion Cipher Mode 2024
