Lada N. Synthesizing the hardware implementation means for groups of symmetric two-operand stream ciphering operations / N. Lada, S. Kozlovska, V. Zazhoma, S. Vysotskyi // Control, Navigation and Communication Systems. Academic Journal. – Poltava: PNTU, 2019. – VOL. 5 (57). – PP. 55-58. – doi:https://doi.org/10.26906/SUNZ.2019.5.055.