Calculation of non-linearity and algebraic degree of constructed boolean function
2017
In cryptography systems, to resist algebraic and fast algebraic attack (FAA),
Boolean functionwould have high value of nonlinearity, high value of algebraic degree and large algebraic immunity (AIm(f)). We have calculated the nonlinearity (
nl(f)) of the constructed
Boolean functionand proved the lower bound on nonlinearity, which are identical to best lower bound of known
Boolean functionto resist linear, correlation and fast algebraic attacks. We have also calculated algebraic degree (Ad(f)) of constructed
Boolean functionand its value is equal to Ad(f) of well known
Boolean function. In this paper, definition of balancedness,
nl(f), Ad(f) and AIm(f) are also defined in preliminaries.
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