BS ISO/IEC 18033-7:2022

Information security. Encryption algorithms. Tweakable block ciphers | Status: Current

1 Scope This document specifies tweakable block ciphers. A tweakable block cipher is a family of n-bit permutations parametrized by a secret key value and a public tweak value. Such primitives are generic tools that can be used as building blocks to construct cryptographic schemes such as encryption, Message Authentication Codes, authenticated encryption, etc. A total of five different tweakable block ciphers are defined. They are categorized in Table 1. Table 1 — Tweakable block ciphers specified Block length Tweakey length Algorithm name 128 bits 256 bits Deoxys-TBC-256 128 bits 384 bits Deoxys-TBC-384 64 bits 192 bits Skinny-64/192 128 bits 256 bits Skinny-128/256 128 bits 384 bits Skinny-128/384