Air-Fi! Stealing data from an isolated computer Air-Fi Technique is used to extract data from an air-gapped computer, which is physically isolated and not connected to other networks. Download InfographicDownload and share the infographic for free with employees. How Air-Fi Works? Attacker implants a specially designed malware on the air-gapped system. The malware manipulates the electrical current inside the RAM on the air-gapped computer to generate electromagnetic radiation at a 2.4 GHz frequency. The attacker infects the nearby Wi-Fi enabled device to intercept the generated signals and exfiltrate the air-gapped system’s data. How to prevent Air-Fi attacks? Avoid placing Wi-Fi enabled devices near the isolated or air-gapped systems. Always monitor air-gapped systems for suspicious activities. Restrict external devices, including push-button phones, in the enterprise. Use signal jamming techniques to prevent the transmission of Wi-Fi signals around the air-gapped system.