Cash registers have been scanning barcodes on food, clothes, and our other purchases for 50 years.

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.

Quishing is proving effective, too, with millions of people unknowingly opening malicious websites. In fact, 73% of Americans admit to scanning QR codes without checking if the source is legitimate.