How can a QR code lead to a security problem?
A QR code can encode a website address, contact, message, WiFi network, or payment action. The risk begins when the destination imitates a trusted service, pressures you to act, requests sensitive information, or starts an action you did not expect.
What should you inspect before opening a QR link?
Read the full domain carefully, look for misspellings or unusual subdomains, and ask whether the destination makes sense for the place where you found the code. A link preview creates a useful pause before the browser opens.
Which public QR codes deserve extra caution?
Be especially careful with codes placed over another sticker, attached to payment terminals or parking signs, delivered in unexpected messages, or paired with urgent instructions. When possible, use the organization's official app or type its known address yourself.
What should you do after opening a suspicious QR destination?
Close the page without entering information or installing anything. If you submitted a password, change it through the service's official app or website and enable multi-factor authentication. Contact your bank promptly if payment details were involved.