IACR News item: 23 February 2014
S. M. Dehnavi, Alireza Rahimipour
ePrint ReportAlgebraic properties of modular addition modulo a power of two have been studied for two operands by Braeken in fse\'05. Also, the authors of this paper, have studied this operator, in some special cases, before. In this paper, taking advantage of previous researches in this area, we generalize the algebraic properties of this operator for more than two summands. More precisely, we
determine the algebraic degree of the component Boolean functions of modular addition of arbitrary number of summands modulo a power of two, as a vectorial Boolean function, along with the number of terms and variables in these component functions. As a result, algebraic degrees of the component Boolean functions of Generalized Pseudo-Hadamard Transforms are driven.
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