Lightweight AEAD and Hashing using the Sparkle Permutation Family
English
Beierle, Christof[University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > > ; Ruhr University Bochum > Horst Görtz Institute for IT Security]
Biryukov, Alex[University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Computer Science and Communications Research Unit (CSC) > ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)]
Cardoso Dos Santos, Luan[University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Computer Science and Communications Research Unit (CSC) >]
Groszschädl, Johann[University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Computer Science and Communications Research Unit (CSC)]
International Association for Cryptologic Research
2020
S1
Special Issue on Designs for the NIST Lightweight Standardisation Process
208-261
Yes
International
2519-173X
Santa Barbara
USA
[en] Lightweight Cryptography ; Authenticated Encryption ; Hash Function ; Long Trail Strategy ; SPARKLE
[en] We introduce the Sparkle family of permutations operating on 256, 384 and 512 bits. These are combined with the Beetle mode to construct a family of authenticated ciphers, Schwaemm, with security levels ranging from 120 to 250 bits. We also use them to build new sponge-based hash functions, Esch256 and Esch384. Our permutations are among those with the lowest footprint in software, without sacrificing throughput. These properties are allowed by our use of an ARX component (the Alzette S-box) as well as a carefully chosen number of rounds. The corresponding analysis is enabled by the long trail strategy which gives us the tools we need to efficiently bound the probability of all the differential and linear trails for an arbitrary number of rounds. We also present a new application of this approach where the only trails considered are those mapping the rate to the outer part of the internal state, such trails being the only relevant trails for instance in a differential collision attack. To further decrease the number of rounds without compromising security, we modify the message injection in the classical sponge construction to break the alignment between the rate and our S-box layer.
Fonds National de la Recherche - FnR ; University of Luxembourg - UL
[University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Computer Science and Communications Research Unit (CSC) > ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)]
