>>106094973
All eletronic devices emit electromagnetic radiation. You can build devices that are able to pick up on this and view your monitor remotely, read your memory remote or read your keyboard input remotely. This has been demonstrated multiple times to be possible without requiring special hardware. There was one demonstration where somebody bought $200 worth of electronics and built such a device. Federal agents could just drive outside your house with a car and get all your private information, even if your harddrive is encrypted. To protect against this you need to enclose your electronic devices in a faraday cage, like the co-creator of piratebay did. See pic.