The original presentation of the material will allow the reader to understand the methods of ensuring information protection, both on personal computers and in professional systems. The basic principles of hacker toolkit selection are described. Many examples of hacking and hiding traces are given: password interception, attacks on Wi-Fi routers, MAC address spoofing, ways to remain invisible on the Internet. In contrast to the attacker, methods of protection using appropriate software tools are described. Recommendations are given on how to do so as not to lose your money with remote banking services.