In simple and understandable language, we explain how to hide your location and IP address using the anonymous networks Tor and I2P, visit sites blocked by the administrator, protect personal correspondence from prying eyes, get rid of spam, encrypt data stored on your hard drive with TrueCrypt and transmitted over the network. Special attention is paid to protecting your home network from unexpected guests, from neighbors using someone else's wireless network, and choosing an antivirus and firewall (using the example of Comodo Internet Security). Shows how to protect your page on a social network, delete files permanently and much more. For a wide range of users