The SKINNY Family of Block Ciphers and Its Low-Latency Variant MANTIS

Christof Beierle, Jérémy Jean, Stefan Kölbl, Gregor Leander, Amir Moradi, Thomas Peyrin, Yu Sasaki, Pascal Sasdrich, Siang Meng Sim

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


We present a new tweakable block cipher family SKINNY, whose goal is to compete with NSA recent design SIMON in terms of hardware/ software performances, while proving in addition much stronger security guarantees with regards to differential/linear attacks. In particular, unlike SIMON, we are able to provide strong bounds for all versions, and not only in the single-key model, but also in the related-key or related-tweak model. SKINNY has flexible block/key/tweak sizes and can also benefit from very efficient threshold implementations for sidechannel protection. Regarding performances, it outperforms all known ciphers for ASIC round-based implementations, while still reaching an extremely small area for serial implementations and a very good efficiency for software and micro-controllers implementations (SKINNY has the smallest total number of AND/OR/XOR gates used for encryption process).

Secondly, we present MANTIS, a dedicated variant of SKINNY for lowlatency implementations, that constitutes a very efficient solution to the problem of designing a tweakable block cipher for memory encryption. MANTIS basically reuses well understood, previously studied, known components. Yet, by putting those components together in a new fashion, we obtain a competitive cipher to PRINCE in latency and area, while being enhanced with a tweak input.
Original languageEnglish
Title of host publicationAdvances in Cryptology – CRYPTO 2016 : Proceedings of the 36th Annual International Cryptology Conference, Part II
Publication date2016
ISBN (Print)978-3-662-53007-8
ISBN (Electronic)978-3-662-53008-5
Publication statusPublished - 2016
Event36th International Cryptology Conference (CRYPTO 2016) - Santa Barbara, CA, United States
Duration: 14 Aug 201618 Aug 2016
Conference number: 36


Conference36th International Cryptology Conference (CRYPTO 2016)
CountryUnited States
CitySanta Barbara, CA
Internet address
SeriesLecture Notes in Computer Science


  • Lightweight encryption
  • Low-latency
  • Tweakable block cipher
  • MILP

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