Hackers may struggle to convince grandma that she should scan a random QR code, and because this QR code system does not ... by the prospect of pulling out my phone and pointing it at a screen ...

Don't scan random QR codes ... that can also help a hacker take over the victim's phone while remaining hidden from detection. "Using QR codes in snail mail offers the criminals a few advantages ...

"There's really no reason for someone to pull out their phone and scan a QR code ... If it asks for login or banking information that doesn't seem needed, don't hand it over. Codes embedded ...