On the number of rotation symmetric functions over GF(p)
2012
Fu, Shaojing | Li, Chao | Qu, Longjiang | Dong, Deshuai
Rotation symmetric functions which are invariant under circular translation of indices are widely used as components of different cryptosystems. In this paper, we do some enumeration on rotation symmetric functions over GF(p). First, we prove that the construction and enumeration of balanced rotation symmetric functions over GF(p) are equivalent to solving a specified equation system and enumerating the solutions, and then a lower bound on the number of balanced rotation symmetric functions over GF(p) is given. Furthermore, we give a formula to count homogeneous rotation symmetric functions which solves the open problem in Li (2008) [15].
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