He works in the field of information technology security. The scientific work gives him the freedom of thought, the ability to seek context, and a better understanding of the events that surround us. It is always fortunate for a scientist to see the practical application of the results of his own research while he is still alive. In today's world of the Internet, it is difficult to spark the students’ interest. Thus, he tries hard to enrich his lectures with historical context, where giants of informatics and cryptology long sought the right solutions.