TEMPEST HDMI demo скачать в хорошем качестве

TEMPEST HDMI demo

A HDMI/DVI connected monitor is viewed remotely via radio emanations. (video is silent on purpose) See my talk about this:    • GRCon20 - SDR Analog Video Decoding Advent...   How to do the same with GNU Radio: https://hackaday.com/2020/05/14/tempe... General information: https://en.wikipedia.org/wiki/Van_Eck... FAQ: What is the software? It's something that I made myself for this purpose. Can you publish the software? Unfortunately not, but there is a similar open source program publicly available, called TempestSDR. Check out gr-tempest too! Can you sell the software? No -- I can't legally guarantee that there is absolutely no components from sources that have incompatible licensing. How can a radio signal be made into a picture? 1) Tune the radio into the correct frequency. 2) Set it to sample IQ at 10 million samples per second or more. 2) Take the signal amplitude at every sample (sqrt(i*i + q*q)) and directly use it as the brightness of a pixel. 3) Plot this pixel into an image. Then, move to the next pixel to the right. If it's the last pixel of the row, move to the next row. 4) There is a synchronization pulse readily available in every row of pixels; this can be used to line up the rows. You can use a PLL to lock onto it. 5) How many pixels in a row? This has to be determined experimentally in a case-by-case basis. Which receiver is this? AirSpy R2 What is the big antenna? It's a 430-470 MHz 5-el +9.7 dB yagi-uda, an old telco test antenna that someone gave away for free. What do I need to accomplish this? Google for tempest hackaday, there is an open-source solution available. Why is this signal being emanated? Bit transitions in the HDMI data cause changes in the electromagnetic field that are concentrated on multiples of the pixel clock frequency and emanated as radio waves. The cable is most likely acting as an antenna. What can be done to prevent this? Use a shorter cable, or a scrambled protocol such as HDMI2 or DisplayPort. Scrambling makes it very difficult to recover picture information.