Some properties of q-ary bent functions
Let F be a function from a finite field Q to a finite field P. Here, both fields are of characteristic 2, |P| = q ^ 2 and Q is the expansion of the field P. The period of F is defined as the period of the sequence u(i) = F(0 ) (0 - primitive element of Q, i G No). Besides, let N a(F) be a number of solutions in Q of equation F(x) = а, а G P. Consider F to be a bent function. In this case, it is shown that if the period of F is not maximal one, then exact values of N a(F), а G P, can be derived. Moreover, if values of N a(F), а G P, are of a special form, then the value of the period of F is divisible by some exact value.
Keywords
бент-функция, период функции, уравнения в конечных полях, bent functions, period of a function, equations over finite fieldsAuthors
Name | Organization | |
Shishkin V. A. | shishkin.vasily@gmail.com |
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