For $20, you can make a DIY Stingray in minutes, using parts from Amazon

Stingrays were once the most secretive of surveillance technology: devices whose existence was so sensitive that the feds actually raided local cops and stole their crime files to stop them from being introduced in court and revealing the capability to spy on cellular phones. Read the rest

Cities' emergency sirens will play anything you send them over an unencrypted radio protocol

It's been a year since someone hacked all 156 of Dallas's emergency tornado sirens, setting them off in the middle of the night, and the security picture for cities' emergency PA systems keeps getting uglier. Read the rest