Facial recognition technology is likely not as safe as you may have thought. This was illustrated by a recent test where 3D printed busts of peoples’ heads were used to unlock smartphones.

Out of five tested phones, only one refused to open when presented with the fake head.

Other biometric security measures are also showing less resilience to hacking than you might expect. A group of Japanese researchers recently showed it was possible to copy a person’s fingerprints from pictures like the ones many of us post on social media.