Hot on the Trail of a Mass-School-Shooting Hoaxer

For months, an anonymous caller has terrorized communities around the US by reporting false shooting threats. We know how they did it. The question is, why?

The Challenge of Cracking Iran’s Internet Blockade

People around the world are rallying to subvert Iran's internet shutdown, but actually pulling it off is proving difficult and risky.

Iran’s Internet Shutdown Hides a Deadly Crackdown

Amid protests against the killing of Mahsa Amini, authorities have cut off mobile internet, WhatsApp, and Instagram. The death toll continues to rise.

iOS Can Stop VPNs From Working as Expected—and Expose Your Data

A security researcher claims that Apple mobile devices keep connections open if they are created before a VPN is activated.

How to Safely Lend Someone Else Your Phone

The next time someone wants to borrow your device to make a call or take a picture, take these steps to protect your privacy.