QR codes are everywhere, and they can also be dangerous. Here’s how to stay safe with some hints from Tom Merritt. QR codes have become ubiquitous, driven to even wider use by pandemic concerns. Lots ...

How big your code should be printed depends on how many characters you “encode” into it. It can take an absolute maximum 7,000 characters, but realistically most people will encode about 20 letters or ...

Forbes contributors publish independent expert analyses and insights. Davey Winder is a veteran cybersecurity writer, hacker and analyst. The simple answer, and the one most often provided in online ...