CSS also known as Stingrays or IMSI catchers are devices that masquerade as legitimate cellphone towers, tricking phones within a certain radius. #EFF

Electronic Frontier Foundation

Meet Rayhunter: A New Open Source Tool from EFF to Detect Cellular Spying

Rayhunter is a new open source tool we’ve created that runs off an affordable mobile hotspot that we hope empowers everyone, regardless of techni...