ISO/IEC 18033-7:2022

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Information security - Encryption algorithms - Part 7: Tweakable block ciphers

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ISO/IEC 18033-7:2022

Information security - Encryption algorithms - Part 7: Tweakable block ciphers

PUBLISH DATE 2022
ISO/IEC 18033-7:2022

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 TableΒ 1.

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