Real-time bidding, which powers nearly every ad you see online, might be the most privacy-invasive surveillance system that you’ve never heard of. Learn how it works and how to protect yourself.

Electronic Frontier Foundation

Online Behavioral Ads Fuel the Surveillance Industry—Here’s How

Each time you see a targeted ad, your personal information is exposed to thousands of advertisers and data brokers through a process called “real...

With Rayhunter, we can find out how cell site simulators are being used, and protect ourselves and our communities from this form of surveillance.

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...