Reviving TEMPEST Attacks With An Injected Signal
Summary
Hackaday reports on a revived TEMPEST attack technique named InjectEave that uses an injected RF signal to induce nonlinear mixing in electronics, enabling recovery of internal signals from devices. The study demonstrates that with a tuned RF, internal antennas can emit recoverable data, including audio from headphones and even real-time voice injection on VoIP calls, over short to moderate distances. The piece notes potential for open-source implementations and relevance to side-channel and hardware security risk.