As the main result are found non-linear 26, 27, 28 and 29 degrees polynomials. The author suggests, describes and explores the search method of nonlinear feedback shift registers, generating a sequence with a maximum period. A comparison of the generation rate of the sequences that are generated by nonlinear feedback shift registers is done using hardware and software.
The dependence of the maximum generation rate (clock frequency), programmable logic devices on the number of concurrent nonlinear registers is analyzed. Recommendations to increase this performance are given. Performance evaluation of programmable logic devices in the generation of pseudo-random sequence by nonlinear feedback shift registers is given. These registers form a maximal length sequence, using programmable logic devices. Feasibility of nonlinear feedback shift register search is analyzed. The nonlinear feedback shift registers of the second order inare considered, because based on them it can be developed a generator of stream ciphers with enhanced cryptographic strength.
