Cryptology ePrint Archive: Report 2013/568

Cryptanalysis of the Speck Family of Block Ciphers

Farzaneh Abed and Eik List and Stefan Lucks and Jakob Wenzel

Abstract: Simon and Speck are two families of ultra-lightweight block ciphers which were announced by the U.S. National Security Agency in June 2013. This paper presents differential and rectangle attacks for almost all members of the Speck family of ciphers, where we target up to 11/22, 12/23, 15/27, 15/29, and 18/34 rounds of the 32-, 48-, 64-, 96-, and 128-bit version, respectively.

Category / Keywords: Differential cryptanalysis, block cipher, lightweight, Speck

Date: received 6 Sep 2013, last revised 9 Oct 2013

Contact author: eik list at uni-weimar de

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Version: 20131009:160213 (All versions of this report)

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