Discrete Applied Mathematics
Designs, Codes and Cryptography
Algorithms for exponentiation in finite fields
Journal of Symbolic Computation
The trace of an optimal normal element and low complexity normal bases
Designs, Codes and Cryptography
Gauss periods as constructions of low complexity normal bases
Designs, Codes and Cryptography
On the complexity of the dual basis of a type I optimal normal basis
Finite Fields and Their Applications
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We investigate low complexity normal bases in finite fields of the form F"2"^"n. First, we prove that if two normal elements have the same multiplication table, then they are conjugates. Then, we provide a partial converse to the known fact that if @a generates a Type I optimal normal basis in F"2"^"n, then its dual basis has complexity 3n-3. Finally, we determine the multiplication tables of low complexity normal elements that arise from products of normal elements in subfields of F"2"^"n.