V-sign selfie could lead to biometric data theft

Cybersecurity experts warn that photos with the two-finger V-sign posted on social media can reveal users' fingerprints in high-resolution images. This enables criminals to steal biometric data used to unlock smartphones.

Millions of people post photos with the two-finger V-sign, also known as the peace sign or victory sign, to social media every day. However, cybersecurity experts warn that this popular pose can become a serious security risk, as fingerprints can be clearly visible in high-resolution photos.

How does the threat work?

Modern smartphones are increasingly locked using biometric data, particularly fingerprints. If criminals can digitally reconstruct the fingerprint pattern from a high-quality image, they could theoretically create an artificial copy to unlock the device. Experts emphasize that photos are especially risky when fingers are just tens of centimetres from the camera and the picture is taken in good lighting.

What should you do?

Specialists recommend avoiding publishing high-resolution photos where fingers are close to the camera and clearly visible. It's also worth considering using a strong PIN code or password alongside biometric protection on your smartphone, which adds an extra layer of security in case biometric data falls into the wrong hands.

Cybersecurity experts remind us that biometric data, unlike passwords, cannot be changed. Once a fingerprint is compromised, it remains a risk for life. That is why it's important to be aware of what information our everyday social media posts actually contain.