Speck of chaos

Memory Efficient Speck Based Coders

Linear cryptanalysis of reduced-round SPECK

Article history: Received 15 September 2015 Accepted 5 November 2015 Available online 2 December 2015 Communicated by S.M. Yiu

Alexandre Almeida Frank - Olme Speck

The aim of this work is to describe main aspects of the modern theory of fractional differential equations, to present elements of classification of fractional differential equations, to formulate basic components of investigations related to fractional differential equations, to pose some open problems in the study of fractional differential equations. A survey of results by S.G. Samko on diff...

Rotational-XOR Cryptanalysis of Reduced-round SPECK

In this paper we formulate a SAT/SMT model for Rotational-XOR (RX) cryptanalysis in ARX primitives for the first time. The model is successfully applied to the block cipher family Speck, and distinguishers covering more rounds than previously are found, as well as RX-characteristics requiring less data to detect. In particular, we present distinguishers for 10, 11 and 12 rounds for Speck32/64 w...

Improved Differential Cryptanalysis of Round-Reduced Speck

Simon and Speck are families of lightweight block ciphers designed by the U.S. National Security Agency and published in 2013. Each of the families contains 10 variants, supporting a wide range of block and key sizes. Since the publication of Simon and Speck, several research papers analyzed their security using various cryptanalytic techniques. The best previously published attacks on all the ...