In this project we have extended the original gr-tempest (a.k.a. Van Eck Phreaking or simply TEMPEST; i.e. spying on a video display from its unintended electromagnetic emanations) by using deep learning to improve the quality of the spied images. See an illustrative diagram above. We are particularly interested in recovering the text present in the display, and we improve the Character Error Rate from 90% in the unmodified gr-tempest, to less than 30% using our module.

In addition to the source code, we are also open sourcing the whole dataset we used. Follow this dropbox link to download a ZIP file (~7GB).

This program transmits radio on computers / phones without radio transmitting hardware.

An implementation of TEMPEST with GNU Radio. This is basically a re-implementation of Martin Marinov's excelent TempestSDR in GNU Radio (see https://github.com/martinmarinov/TempestSDR). The reason is that I felt it may be easier to maintain and extend. Note however that the basic ideas were imitated, but the synchronization algorithms are different, and some functionalities (particularly in the GUI) are missing.

Cryptome's page of TEMPEST documents, most of which are declassified NSA docs though there are also mirrors of TEMPEST info from the private sector. Also has a very interesting discussion of how STU-III phones can be accidentally compromised by stray RF. Oops.