Android and iOS both have built-in tools to easily open QR codes from screenshots.

You’ll be a scanner in no time with this guide to getting the all-conquering QR codes ...

A attack using QR codes is known as "quishing," a combination of QR code and phishing. The danger isn't the QR code itself; it's where it quietly sends you.

These days you can't go anywhere without coming across a QR code, which may leave you wondering exactly why every one of these codes has 3 large corner squares.