Can fingerprints still unlock mobile phones after death?

The Weibo topic "Can fingerprints still unlock mobile phones after death" has become a hot search topic, sparking heated discussions. In the comment area,Many netizens believe that fingerprints cannot unlock mobile phones after death because mobile phones cannot recognize fingerprints when hands are cold and cold outside in winter.

In this regard, experts pointed out that whether it can be unlocked depends on the specific situation.For example, optical fingerprints cannot identify whether the fingerprint holder still has vital characteristics. Therefore, there is a high probability that the fingerprint can still be unlocked after death.

In comparison, the security of capacitive fingerprints is relatively high.

It is reported that,Human cell activity produces weak currents, and the fingerprint pattern is microscopically uneven, so the contact between the silicon wafer and the skin's electrolyte can form an electric field that rises and falls. At this time, the sensor can collect the shape of the fingerprint and obtain the image for unlocking.

Generally speaking, after the human body dies, the cells in the body will still maintain activity for about 3 hours. At this time, the human body will still have corresponding current, and there will be a higher probability of unlocking the phone.

But as the time of death continues to extend, the probability of unlocking will become smaller and smaller.