IMSI catchers
This App Claims to Know When Police Are Tracking You with Fake Cell Towers
SnoopSnitch can detect Stingrays, and its founders want to create maps that track where they are abused.
How the Justice Department Keeps Its Cell Phone Snooping a Secret
The full details of how police departments in the US are using military-grade surveillance technology—often without warrants—are being blocked from release by an aggressive effort from the federal government and the corporation that sells the devices.
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