Abstract. Today, computers are firmly integrated into our daily lives. Work at any level without large volumes of information transfer seems impossible in modern society. This all makes it necessary to protect information at all levels. Once in the hands of attackers, this data can cause irreparable harm. In this regard, information protection as a whole is seen as a very important aspect of modern network security. The content of this paper will be useful both to specialists in the field of information security and to ordinary users.