DAN HOWLEY: The QR code explosion has really taken off as a result of the pandemic. We've seen obviously, as you mentioned, at restaurants, at places like conferences, QR codes popping up everywhere.

The holiday season is here and receiving a package you didn't order could be a fun surprise, but be careful -- especially if ...

This spring, students at San Jose State University may have noticed two small pixelated squares on posters around campus. If they scanned the square with their cell phones, they would have been linked ...