Can you still open your phone when you die?

Many people subconsciously think that it can be unlocked, because when a person dies, the fingerprint does not change again.

In fact, the longer a person is dead, the more difficult it becomes to unlock the phone with your finger.

This is because, on most smartphones, fingerprint recognition is carried out through electrical conductance.

Fingerprint unlocking principle.

We all have a little bit of electricity going through our body, and when we put our finger on the fingerprint scanner, the lines of the fingerprint touch the surface, while the grooves of the lines don't.

If a person dies, can a fingerprint still unlock a phone?

Mobile phone fingerprint recognition.

The sensor will use these modes to form a detailed image. But when a person dies, this current stops, and the opportunity to interact with the scanner is lost.

However, scientists have not yet been able to determine the exact time when a person's body loses this conductance after death. In order to figure this out, a lot of corpses are needed, and their fingerprints must be taken every hour or so to unlock the phone ......

This had to be someone in the morgue all the time, so it was quite a difficult experiment.

Other fingerprint unlocking methods.

However, not all fingerprint readers work by electrical conductance. For example, older fingerprint readers use optical sensors to measure changes in light between lines and furrows to form an image.

But this method is easier to be deceived because no electricity is required, making the system easier to hack.

If a person dies, can a fingerprint still unlock a phone?

Conductive fingerprinting.

Technology is also constantly changing, and in the case of the iPhone X, it doesn't have a separate button to read the fingerprint, but instead unlocks it when it detects your face.

In the future, mobile phones will have optical sensors under their screens. It is unclear that these materials can be touched with inanimate fingers, but in this case, conductivity will not be an issue.

Other new technologies include "ultrasound" scanners, which feed ultrasound waves into the finger to measure stress patterns formed by lines and ravines. How they will interact with inanimate fingers remains to be determined.

However, all of these sensors are subject to changes over time. If there is no blood flow, the fingers will start to appear some kind of wrinkles or atrophy.

If a person dies, can a fingerprint still unlock a phone?

This will change the signal of the lines and furrows, creating new lines and eliminating old ones, so that the sensor can detect something completely different from the original fingerprint.

What's more, most phones have some sort of buffer, which makes it more difficult to unlock the phone with your fingerprint after you die.

That said, most phones require you to enter your password after a day or two of inactivity, and you can usually only try a certain number of times.

If someone manages to bypass these obstacles, and the body is a recent death, it is certainly possible to unlock the phone with a lifeless finger.

After a person dies, the fingerprint cannot open the mobile phone, and the fingerprint will lose the function of opening the mobile phone after the person dies, and the fingerprint does not have the conditions to open the mobile phone.

In fact, the longer a person dies, the harder it is to unlock the phone with their fingers. This is because, on most smartphones, fingerprint recognition is done by conductivity. Due to the different principles used to unlock the phone, the success rate of fingerprint unlocking after the death of the owner is also different.

The first is optical fingerprint unlocking, which tends to be not very accurate. An attempt to decipher this method found that shortly after the owner unlocked it with his fingerprint, someone else covered the screen with a piece of paper and pressed to unlock the device.

This is because after the owner unlocks with the fingerprint, the fingerprint remains on the screen, while the white paper can reflect the light to unlock. However, the issue has reportedly been corrected by the manufacturer. Because optical fingerprint unlocking is not very accurate and cannot identify other characteristics of a person, such as whether the person is alive or electric, the probability of passing is high when the fingerprint of the deceased owner is recorded on the mobile phone that is unlocked with optical fingerprint.

Not all fingerprint readers work by conducting electricity.

Old-fashioned fingerprint readers used optical sensors to measure the change in light between grooves and ravines to form an image. If cardiac arrest is the basis of death, then there will still be a weak electric current in the finger for about two hours. During this time, the deceased owner's fingerprint can still be used to unlock the phone.

Since optical fingerprint unlocking is not very accurate and cannot identify other human characteristics, such as whether the person is alive or electric, therefore, when the deceased owner's fingerprint is recorded on the phone, there is a high probability that the phone unlocked with optical fingerprint will pass. In addition to these two cases, there is actually another situation in which fingerprint unlocking will fail, and that is after the death of the human body for a period of time.

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Yes, because the lines of the fingers exist after death, at the beginning, you can use your fingerprint to unlock it, and then there may be no way to use it.

You can't unlock your phone, because your fingerprint will slowly degenerate after you die, and it will change, so you can't unlock your phone.

Absolutely. Although a person is said to have passed away, the person's fingerprint will not change, so you can also unlock the phone.

Theoretically, the cells in the organism do not die immediately after death, so the phone can also be unlocked with a fingerprint. It's just that this is time-limited.

According to the Forbes report, it is actually possible to unlock the phone with the fingerprint of the corpse, but it is related to the time of death. We know that the human body still has cell activity in the body for about 3 hours, so there is still an electric current generated, but 12 hours after death, the biological remains will gradually become cold, and after 24 hours, the biological remains will completely cool.

Therefore, as long as it does not take more than 3 hours, the mobile phone can be unlocked with biological remains.

According to a forensic doctor, he had tested whether the deceased's fingerprint could unlock his mobile phone with his fingerprint, and the results were different for different mobile phones.

Huawei's mobile phone cannot use the deceased's fingerprint to unlock the phone; And Samsung's phone can unlock the phone with the fingerprint of the deceased. From this result, it can also be seen that some mobile phones can identify whether a creature is alive or not. (Mobile phones that can't identify whether a creature is alive or not may be because the creature dies for a short period of time.)

Most mobile phones use fingerprint furrow changes and capacitive modules, so when there is no current passing through the organism, it is theoretically impossible to unlock the phone through fingerprint.

Nowadays, people are paying more and more attention to their privacy, and our smartphones can also cleverly solve this concern for us, because many smartphones now basically apply the function of fingerprint unlocking.

Because before the advent of Apple's mobile phone, most mobile phones were unlocked by a digital password or a pattern password, and no one could think of fingerprint unlocking at that time. But because Apple mobile phones have developed the function of fingerprint unlocking. And after it came out, it was also sought after by many people.

Even more and more people are buying iPhones. Therefore, there are also many mobile phone brands that want to break through this technology and apply fingerprint unlocking to their own brands. After a person dies, can fingerprints still be used?

In fact, the application of fingerprint unlocking is particularly complicated, he needs the mobile phone to record the owner's fingerprint, and then through microcurrent transmission and so on to accurately open the mobile phone, but in this process the mobile phone needs to perceive the state of the owner.

So many people are curious, if the person has died, can her mobile phone still be opened through the fingerprint? So many people have also done experiments on this problem to verify this problem.

After the unremitting efforts of various scientific researchers, they finally studied the answer to this question, they said that if a person dies for a long time, their fingerprint is invalid, so this also shows that within three hours of death, fingerprints can still be used.

In fact, it is because after death, all organs of the body will be depleted, they will stop functioning, the body will become hard, etc., and the microcurrent on the fingers will also be depleted with the depletion of the organs, so at this time, there will be no reaction between the fingers and the mobile phone.

At this time, the fingerprint of the human body will lose its effect, so it is definitely not possible to apply fingerprint unlocking at this time. This also tells us that if we need to unlock the deceased's mobile phone, we must unlock his mobile phone within three hours.

With the continuous development of society, there are now more and more high-end products and some application technologies on the market, such as mobile phone scanning code payment, so that people do not need to bring cash, bank cards to go out, providing a lot of convenience for our lives, in addition, it should be the application of fingerprints.

Nowadays, fingerprint recognition technology has been applied in more and more places, such as the police can find suspects through human fingerprints. Because each person's fingerprint is unique and cannot be impersonated.

In addition to helping the police find criminals, fingerprint recognition technology is directly applied to mobile phones, because the previous mobile phones are unlocked by entering a password or pattern, which is actually very inconvenient, because it is likely to forget.

So in order to make it easier for people to unlock their mobile phones, Apple invented this function, after that, everyone recognized the benefits of fingerprint unlocking, so many mobile phone brands are also competing to imitate and break through the technical difficulties, so most of the smartphones on the market are unlocked through fingerprint recognition.

However, everything has drawbacks, and fingerprint unlocking is also included, because if someone hijacks you and has to use your fingerprint to open the lock, this situation is really unavoidable, especially after the person dies, it is easier for others to use your fingerprint.

Because there was a case in the United States before, the police wanted to unlock the mobile phone of the deceased suspect, but at this time, the suspect's fingerprint was no longer usable, and then people were curious, is the fingerprint invalid after death?

In fact, this is not the case, some studies have shown that as long as a person's fingerprints are used within three hours after death. But if it has been dead for too long, resulting in the degeneration of various functions and organs of the human body, then the fingerprint at this time is invalid.

After a person dies, whether his fingerprint can still unlock the phone depends on how long after his death. Within 3 hours after the death of the human body, his fingerprint can still unlock the mobile phone, and after 3 hours, the mobile phone can basically not be unlocked.

Why is there such an amazing thing? Why is the time divided into 3 hours?

First of all, we need to understand the principle of fingerprint unlocking technology, the fingerprint recognition device first collects the fingerprint of the human body as a reference sample, and then pairs the human body with the fingerprint unlocking process, if the fingerprint is exactly the same, then the pairing is successful, then you can unlock the device, if the fingerprint can not be paired, then the device cannot be unlocked. Why is everyone's fingerprint different? Because this is formed by biological structure, each person's fingerprint is uneven and has different shapes, so it shows different furrows, so each person's fingerprint is unique, which is why fingerprints can be used to unlock, and we can also know that it is not possible to use other people's fingerprints to unlock their own mobile phones.

However, if your device's fingerprint unlocking technology is low-level and you let two people with similar fingerprints unlock it, there is a good chance that someone else can unlock your device.

Our current mobile phones use capacitive fingerprint unlocking technology, that is, the human finger fingerprint has an electrolyte, which can form an electric field with the silicon wafer on the device fingerprint recognition module, so it can identify the fingerprint lines of different human bodies, so as to pair and identify, and then decide whether to unlock or not. Therefore, the key is whether there is an electrolyte for the human fingerprint, because it is the key to fingerprint unlocking.

If the human body has just died, then within three hours, the human body will still have biological activity, which means that our fingerprints and electrolytes, and there will be an electric current in them, so we can carry out a physical reaction. However, if the human body has been dead for more than three hours, especially more than 12 hours, it is basically impossible to unlock, because the human body has no signs of vital activity, and there is no electrical activity in the living body, so it is impossible for the fingerprint recognition device to react.

Yes. Because the fingerprint unlock of the mobile phone is not very intelligent, his fingerprint can generally unlock the mobile phone.

At present, most of the fingerprint unlocked smartphones are identified by radio frequency capacitive sensors, that is, the fingers of living people, the ** cells of the fingers and blood flow, and the temperature is normal to unlock, and there is no way to unlock the fingerprint lock after 3 to 5 hours.