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.

With the final run-up to Christmas set to see shops and festive markets busy with crowds carrying out some last-minute ...