QR codes are everywhere, tantalizing us with hidden information. Of course, a few of them are portals to malware or other uncool business, so it's not a good idea to just scan them all and hope for ...

QR codes–square, dot-matrix variants of the venerable UPC–are becoming an increasingly popular way to share information such as URLs, contact details, GPS coordinates, and calendar events. The idea is ...

The information desk official at the Eiffel Tower, a renowned engineering wonder, appears perplexed when inquired about purchasing tickets using UPI or QR-code payment methods. "I don't know what you ...