Theoretical analysis and TEMPEST study – System and equipment

Electromagnetic spying – TEMPEST Risks, analysis, validation and standards

Figure 1 - Example of correlation between the plaintext message and the detected signal

Figure 2 - Direct radiation leakage (source ANSSI)

Figure 3 - Electrically conductive leak (source ANSSI)

Figure 4 - Emitter leak

Figure 5 - Example of image reconstruction (HDMI cord)

Figure 6 - Example of image reconstruction (black &amp; white laser printer)

Figure 7 - Example of image reconstruction (color laser printer)

Figure 8 - Example of image reconstruction (scanner) with an original layer, then with a protected layer

Figure 9 - Table microphone

Figure 10 - TEMPEST analysis (frequency method)

Figure 11 - TEMPEST analysis (time-based method)

Figure 12 - Large watch&#34; type display

Figure 13 - Image taken from the &#34;big watch&#34; type display

Figure 14 - SR modulation of clocks in a nonlinear component

Figure 15 - Parasitic amplitude modulation of a carrier by a red signal

Figure 16 - Parasitic amplitude modulation of a carrier by a red signal – Frequency representation

Figure 17 - Inductive crosstalk

Figure 18 - Capacitive crosstalk

Figure 19 - Signal recovered at the antenna from the radiation of a video cord

Figure 20 - Progressive scan principle

Figure 21 - Image reconstruction from a radiating VGA cord

Figure 22 - Steps for image reconstruction from a radiating VGA cord

Figure 23 - Digital audio signal filtering PWM

Figure 24 - Digital audio signal PWM

Figure 25 - 2-tone analog audio signal

Figure 26 - S/PDIF digital audio signal filtering

Figure 27 - Variable-amplitude analog audio signal

Figure 28 - Schematic representation of signal transmission on a conductor according to frequency

Figure 29 - Diagram of signal transmission on a network of n conductors according to frequency

Figure 30 - Example of linear joule losses of a conductor and its mass

Figure 31 - Canonical cable characteristics for calculating electric field radiation

Figure 32 - E field radiated at 1 m by a cable 2 or 5 m long, 5 or 1 cm high with respect to ground and carrying a maximum current of 25 dBµA.

Figure 33 - The 3 crosstalk couplings

Figure 34 - SPC coupling by telediaphony between two cables –  L &#61; 2 m and h &#61; 5 cm

Figure 35 - SPC coupling by telediaphony between two cables –  L &#61; 5 m and h &#61; 5 cm

Figure 36 - SPC coupling by telediaphony between two cables –  L &#61; 2 m and h &#61; 1 cm

Figure 37 - TEMPEST zoning measurement system

Figure 38 - TEMPEST zoning: reference measurement

Figure 39 - TEMPEST zoning: room measurement

Figure 40 - TEMPEST zoning: results sheet