Cybersecurity and Privacy

Every security instinct people have built up about links depends on being able to read them. Hover over a link,

The Wi-Fi QR code taped to the wall in a café is doing something more literal than most people assume.

The file you upload is almost never the file that comes back down. Between pressing send and the image appearing

Two QR codes can look identical, encode the same apparent destination, and differ completely in what happens when someone scans

You draw your name onto a PDF with a trackpad, save it, and email it back. Does that count? Usually

Search for photo metadata and you will find a thousand articles about JPEG. Almost all of them stop there, which

“Your files never leave your device.” You have read that sentence on a dozen file-conversion sites. It is sometimes true.

“Photos contain your location” is true but too vague to act on. The useful question is how precisely, and the

A photograph is not only an image. Attached to it, in a region of the file most people never see,