QR codes are so popular that nearly every device with a camera lets you scan them. Here's how to do it with your phone, tablet, or computer. How to scan a QR code with an iPhone or iPad Both ...

While my opinion may not be popular, I think Google's QR code authentication is better than other 2FA methods.

QR codes seem pretty innocuous until you scan a bad one and get something nasty on your system. If you want to keep your phone and your data safe, there are a few ways you can identify a fake QR code.