How do you scan a QR code that's already on your phone's screen? It's surprisingly easy

Scanning QR codes is easy when they're located on ads or the TV, but you may have wondered how to do so when the code is ...
Arizona Daily Star

How QR codes work and what makes them potentially dangerous – a computer scientist explains

QR codes are designed to be scanned using a camera, such as those found on your smartphone. QR code scanning is built into many camera apps for Android and iOS. QR codes are most often used to store ...