Xoodoo cookbook

Joan Daemen; Seth Hoffert; Michaël Peeters; Gilles Van Assche; Ronny Van Keer

Paper 2018/767

Xoodoo cookbook

Joan Daemen, Seth Hoffert, Michaël Peeters, Gilles Van Assche, and Ronny Van Keer

Abstract

This document presents Xoodoo, a 48-byte cryptographic permutation that allows very efficient symmetric crypto on a wide range of platforms and a suite of cryptographic functions built on top of it. The central function in this suite is Xoofff, obtained by instantiating Farfalle with Xoodoo. Xoofff is what we call a deck function and can readily be used for MAC computation, stream encryption and key derivation. The suite includes two session authenticated encryption (SAE) modes: Xoofff-SANE and Xoofff-SANSE. Both are built on top of Xoofff and differ in their robustness with respect to nonce misuse. Other members of the suite are a tweakable wide block cipher Xoofff-WBC and authenticated encryption mode Xoofff-WBC-AE, obtained by instantiating the Farfalle-WBC and Farfalle-WBC-AE constructions with Xoofff. Finally, for lightweight applications, we define Xoodyak, a cryptographic scheme that can be used for hashing, encryption, MAC computation and authenticated encryption. Essentially, it is a duplex object extended with an interface that allows absorbing strings of arbitrary length, their encryption and squeezing output of arbitrary length. This paper is a specification and security claim reference for the Xoodoo suite. It is a standing document: over time, we may extend the Xoodoo suite, and we will update it accordingly.

Note: Added Xoodyak

Metadata

Available format(s): PDF
Publication info: Preprint. MINOR revision.
Keywords: permutation-based crypto Farfalle duplex construction dec functions hashing deck functions authenticated encryption
Contact author(s): joan @ cs ru nl
History: 2019-03-14: revised; 2018-08-25: received; See all versions
Short URL: https://ia.cr/2018/767
License: CC BY

BibTeX

@misc{cryptoeprint:2018/767,
      author = {Joan Daemen and Seth Hoffert and Michaël Peeters and Gilles Van Assche and Ronny Van Keer},
      title = {Xoodoo cookbook},
      howpublished = {Cryptology {ePrint} Archive, Paper 2018/767},
      year = {2018},
      url = {https://eprint.iacr.org/2018/767}
}