Protect Your Mobile Privacy with RayHunter #shorts

Our Take

Credit to STS Technologies LLC for putting a spotlight on RayHunter, the Electronic Frontier Foundation's open-source project that runs on a cheap mobile hotspot to flag suspicious cellular behavior often associated with IMSI catchers, also known as stingrays or cell-site simulators. These devices trick phones into connecting to a fake tower so law enforcement or other actors can log identifiers, track location, or in some configurations intercept communications. It's a different technical flavor than the ALPR cameras we track every day, but it comes from the same playbook: quiet, unaccountable infrastructure that sweeps up data on everyone nearby, not just suspects.

We'd just add the obvious caveat anytime a third-party seller offers a 'ready-to-use' flashed device for sale: the whole point of open-source tools like RayHunter is that you can inspect the code yourself rather than trust a vendor's build. If you're serious about detection, start with EFF's own repository and documentation before buying a pre-configured unit from anyone.

Cell-site simulators and ALPR networks are two heads of the same hydra — both normalize dragnet surveillance with little public oversight. If you want to see how dense the plate-reading side of that hydra has gotten in your area, check our camera map, and if you're ready to push back on surveillance expansion in your city, our take-action page has concrete steps.