How to leak data via Wi-Fi when there’s no Wi-Fi chip: Boffin turns memory bus into covert data transmitter


Mordechai Guri, an Israeli cyber security researcher who focuses on covert side channel attacks, has devised yet another way to undermine air gapping – the practice of keeping computers disconnected from any external network for the sake of security.

In a newly released working paper [PDF], “AIR-FI: Generating Covert Wi-Fi Signals from Air-Gapped Computers,” Guri, head of research and development at Ben-Gurion University of the Negev, Israel’s Cyber-Security Research Center, describes a technique for turning DDR SDRAM buses into transmitters that can spew sensitive data.

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