IACR News item: 25 July 2024
Roberto Avanzi, Orr Dunkelman, Kazuhiko Minematsu
ePrint Report
In this note, we introduce the MATTER Tweakable Block Cipher, designed principally for low latency in low-area hardware implementations, but that can also be implemented in an efficient and compact way in software.
MATTER is a 512-bit wide balanced Feistel network with three to six rounds, using the ASCON permutation as the round function. The Feistel network defines a keyed, non-tweakable core, which is made tweakable by using the encryption of the tweak as its key. Key and tweak are 320-bit inputs.
MATTER is particularly suitable for use in an OCB-like mode of operation, with an encrypted checksum for authentication.
MATTER is a 512-bit wide balanced Feistel network with three to six rounds, using the ASCON permutation as the round function. The Feistel network defines a keyed, non-tweakable core, which is made tweakable by using the encryption of the tweak as its key. Key and tweak are 320-bit inputs.
MATTER is particularly suitable for use in an OCB-like mode of operation, with an encrypted checksum for authentication.
Additional news items may be found on the IACR news page.