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ALGORITHM TO DETERMINE THE FIXED DEGREE POLYNOMIAL OF BOOLEAN FUNCTION FOR CRYPTOGRAPHY

Nguyen Huu Khanh Nhan

Every Boolean function is uniquely defined by a polynomial modulo 2. The degree of a Boolean function is the degree of its defining polynomial. In cryptography, the Boolean functions of fixed degree played important role, for example, 1 or 2 degrees. Therefore, in finding algorithms that recognize properties of Boolean functions polynomials by their values vectors, it makes sense consider only algorithms that have lower complexity order. In this paper, we propose a linear complexity algorithm which determines the vector values a Boolean function given, it is a polynomial of fixed degree, and if so constructing this polynomial.