Technical detail · Side-channel suppression for isolated facilities

Capacity target. Cankaya frames suppression with the Shannon-Hartley limit C = B log2(1 + SNR). Defences either lower the signal power or raise the noise floor. Holding capacity to 1 kbit/s over 1 GHz of bandwidth needs an SNR of about −62 dB or less ¹.
Shielding. Enclosures built to NSA specification 94-106 are cited at −100 dB of attenuation from 100 MHz to 10 GHz ¹. Cable conduits should have at least two right-angle turns, and each turn gives an estimated 15–25 dB of diffraction loss at ultrasonic wavelengths. Air vents should not face each other ¹.
Jamming and monitoring. Radio monitoring can run behind jamming using continuous or interrupted look-through, and a commodity-radio demonstration of continuous look-through is cited at 39 dB of suppression ¹.
Cost. Each 8-rack scalable unit has 64 power cables ("whips") to filter. Cankaya's bill of materials for one scalable unit totals $35,000–$150,000, about 0.1–0.5% of the hardware cost at an assumed $4 million per rack ¹.