Not all smartphones require a third-party app to scan QR codes. Kurt "CyberGuy" Knutsson shows you how to scan codes using iPhone or Androids.

QR codes can house a whole lot of data, from the URL of a webpage or service, to where to directly download an app. Here's how to scan them.

Scammers are using fraudulent QR codes to direct people to malicious sites in order to steal their data or hijack payments, the FBI said.

If the QR code appears to be physically pasted on top of another QR code, ask the business to confirm the code is correct. Before scanning the QR code, check the website address of the code.

The FBI is investigating fraudulent QR code cases all over the country. Ways to protect yourself from fake QR codes Once you scan the QR code check the URL to make sure it looks right.