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A construction of bent functions of $$n+2$$ variables from a bent function of $$n$$ variables and its cyclic shifts. (English) Zbl 1327.94038
Summary: We present a method to iteratively construct new bent functions of $$n+2$$ variables from a bent function of $$n$$ variables and its cyclic shift permutations using minterms of $$n$$ variables and minterms of 2 variables. In addition, we provide the number of bent functions of $$n+2$$ variables that we can obtain by applying the method here presented, and finally we compare this method with a previous one introduced by us in [J.-J. Climent et al., Adv. Math. Commun. 2, No. 4, 421–431 (2008; Zbl 1161.06007)] and with the Rothaus and Maiorana-McFarland constructions.

##### MSC:
 94A60 Cryptography 06E30 Boolean functions
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