Scanning that QR code can leave you vulnerable. Here’s how to protect yourself

QR codes have become a convenience of modern life. Just scan the black and white mosaic with your phone’s camera and you can do everything from connect to your hotel room Wi-Fi to pay for that public parking space to pull up a restaurant menu. 

But QR codes can also leave you vulnerable. That’s because scammers, organized criminal gangs, and shady nation-states are using the unassuming tech to get you to hand over your data unwittingly. Here’s how they’re doing it, and how you can protect yourself.