SKINNY-AEAD and SKINNY-Hash

  • Christof Beierle Ruhr-Universität Bochum, Bochum, Germany
  • Jérémy Jean Agence nationale de la sécurité des systèmes d’information (ANSSI), Paris, France
  • Stefan Kölbl Independent
  • Gregor Leander Ruhr-Universität Bochum, Bochum, Germany
  • Amir Moradi Ruhr-Universität Bochum, Bochum, Germany
  • Thomas Peyrin School of Physical and Mathematical Sciences, Nanyang Technological University, Jurong West, Singapore
  • Yu Sasaki NTT Secure Platform Laboratories, Tokyo, Japan
  • Pascal Sasdrich Ruhr-Universität Bochum, Bochum, Germany
  • Siang Meng Sim School of Physical and Mathematical Sciences, Nanyang Technological University, Jurong West, Singapore
Keywords: SKINNY, Tweakable block cipher, Authenticated encryption, Hash function, NIST, Lightweight cryptography

Abstract

We present the family of authenticated encryption schemes SKINNY-AEAD and the family of hashing schemes SKINNY-Hash. All of the schemes employ a member of the SKINNY family of tweakable block ciphers, which was presented at CRYPTO 2016, as the underlying primitive. In particular, for authenticated encryption, we show how to instantiate members of SKINNY in the Deoxys-I-like ΘCB3 framework to fulfill the submission requirements of the NIST lightweight cryptography standardization process. For hashing, we use SKINNY to build a function with larger internal state and employ it in a sponge construction. To highlight the extensive amount of third-party analysis that SKINNY obtained since its publication, we briefly survey the existing cryptanalysis results for SKINNY-128-256 and SKINNY-128-384 as of February 2020. In the last part of the paper, we provide a variety of ASIC implementations of our schemes and propose new simple SKINNY-AEAD and SKINNY-Hash variants with a reduced number of rounds while maintaining a very comfortable security margin.

https://csrc.nist.gov/Projects/Lightweight-Cryptography

Published
2020-06-22
How to Cite
Beierle, C., Jean, J., Kölbl, S., Leander, G., Moradi, A., Peyrin, T., Sasaki, Y., Sasdrich, P., & Sim, S. M. (2020). SKINNY-AEAD and SKINNY-Hash. IACR Transactions on Symmetric Cryptology, 2020(S1), 88-131. https://doi.org/10.13154/tosc.v2020.iS1.88-131
Section
Articles