Attackers can see what's on your screen, even if your computer is completely disconnected from the Internet.
You don't need to hack your device, know passwords or connect to Wi-Fi to do this.
Craftsmen have created Deep-TEMPEST, a tool that reproduces an image from the screen using electromagnetic radiation from an HDMI cable:.
To intercept the signal, an antenna, an SDR receiver and an amplifier are sufficient.
This is a side channel attack known as TEMPEST;.
The peculiarity of Deep-TEMPEST is that it uses deep learning.
The neural network significantly improves the quality of the reproduced image and helps analyze text on the screen.
The project is already on Github.