We defined in~\cite{EFRST20} a new multiplicative $c$-differential, and the corresponding $c$-differential uniformity and we characterized the known perfect nonlinear functions with respect to this new concept, as well as the inverse in any characteristic. The work was continued in~\cite{RS20}, investigating the $c$-differential uniformity for some further APN functions. Here, we extend the concept to the boomerang uniformity, introduced at Eurocrypt '18 by Cid et al.~\cite{Cid18}, to evaluate S-boxes of block ciphers, and investigate it in the context of perfect nonlinearity and related functions.
Locally-APN Binomials with Low Boomerang Uniformity in Odd Characteristic
Institute of Basic Science, Sungkyunkwan University(成均馆大学基础科学研究院);Department of Mathematics, Sungkyunkwan University(成均馆大学数学系);Applied Algebra and Optimization Research Center, Sungkyunkwan University(成均馆大学应用代数与优化研究中心)
On Differential and Boomerang Properties of a Class of Binomials over Finite Fields of Odd Characteristic
Institute of Basic Science, Sungkyunkwan University(基础科学研究院,成均馆大学);Department of Mathematics, Sungkyunkwan University(数学系,成均馆大学);Applied Algebra and Optimization Research Center, Sungkyunkwan University(应用代数与优化研究中心,成均馆大学)
On APN Exponents and the Differential and Boomerang Properties of Binomials in Characteristic 3
Institute of Basic Science, Sungkyunkwan University(基础科学研究所,成均馆大学);Department of Mathematics, Sungkyunkwan University(数学系,成均馆大学);Applied Algebra and Optimization Research Center, Sungkyunkwan University(应用代数与优化研究中心,成均馆大学)
An in-depth study of the power function $x^{q+2}$ over the finite field $\mathbb{F}_{q^2}$: the differential, boomerang, and Walsh spectra, with an application to coding theory
On the Differential-Linear Connectivity Table of Vectorial Boolean Functions
Vectorial Boolean functions are crucial building-blocks in symmetric ciphers. Different known attacks on block ciphers have resulted in diverse cryptographic criteria for vectorial Boolean functions, such as differential uniformity and nonlinearity. Very recently, Bar-On et al. introduced at Eurocrypt'19 a new tool, called the differential-linear connectivity table (DLCT), which allows for taking into account the dependency between the two subciphers $E_0$ and $E_1$ involved in differential-linear attacks. This new notion leads to significant improvements of differential-linear attacks on seve…
On the Differential Linear Connectivity Table of Vectorial Boolean Functions
Vectorial Boolean functions are crucial building blocks in symmetric ciphers. Different known attacks on block ciphers have resulted in diverse cryptographic criteria of vectorial Boolean functions,such as differential distribution table and nonlinearity. Very recently, Bar-On et al. introduced at Eurocrypt'19 a new tool, called the Differential-Linear Connectivity Table (DLCT).This paper is a follow-up work, which presents further theoretical characterization of the DLCT of vectorial Boolean functions and also investigates this new criterion of functions with certain forms. In this paper we i…