eff rayhunter

Cybersecurity

EFF’s Rayhunter: Open-Source Tool to Detect Cellular Spying

September 18, 2025
Stylized illustration of a giant eye overlooking a city, with the text 'RayHunter: Detect Cellular Spying'.

The Electronic Frontier Foundation (EFF) has released Rayhunter, an open-source tool that detects cell site simulators used for unauthorized mobile…

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