This paper has four main contributions. First, we calculate the predicted difference
distribution of Speck32/64 with one specific input difference under the Markov assumption …

We propose two systematic methods to describe the differential property of an S-box with
linear inequalities based on logical condition modelling and computational geometry …

We propose a new block cipher LEA, which has 128-bit block size and 128, 192, or 256-bit
key size. It provides a high-speed software encryption on general-purpose processors. Our …

Over the years, there has been considerable interest in the area of chaos-based encryption
due to the fact that cryptographic algorithms and chaotic maps share a wide-range of similar …

We propose Chaskey: a very efficient Message Authentication Code (MAC) algorithm for 32-
bit microcontrollers. It is intended for applications that require 128-bit security, yet cannot …

Abstract In recent years, Mixed Integer Linear Programming (MILP) has been successfully
applied in searching for differential characteristics and linear approximations in block …

We study software performance of authenticated-encryption modes CCM, GCM, and OCB.
Across a variety of platforms, we find OCB to be substantially faster than either alternative …

We present, for the first time, a general strategy for designing ARX symmetric-key primitives
with provable resistance against single-trail differential and linear cryptanalysis. The latter …

Skein is a new family of cryptographic hash functions. Its design combines speed, security,
simplicity, and a great deal of flexibility in a modular package that is easy to analyze. Skein …

This paper presents differential attacks on Simon and Speck, two families of lightweight
block ciphers that were presented by the US National Security Agency in June 2013. We …