The QR or Quick Response code is one of those curious little technological aspects of our lives that we've just become accustomed to. We don't often question these monochrome marvels, or where they ...

QR (Quick Response) codes are everywhere these days. You'll spot them on restaurant menus, business cards, product packages, and even concert tickets. A big reason they've caught on is convenience.

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 ...