А. М. Potapenko - Ph.D. (Eng.), Senior Research Scientist, Professor, Department of Information Protection and Communication Systems, South-West State University, Kursk, Russia. E-mail: pam1952@mail.ru
А. G. Yurchenko - Senior Engineer-Programmer, Сlosed Joint Stock Company «Scientific-Technical Center «Search IT», Moscow, Russia. E-mail: a.yurchenko@poisk-it.ru