The IPhone 5s doesn't accept "dead" fingerprints, and mom doesn't have to worry about me getting chopped off.

Yesterday, CCTV reported that the IPhone 5s fingerprint identification or a number of security risks, many experts pointed out that fingerprints are the most easily left "biological traces", simply not "safe", thieves may even cruel cut off the owner's fingers, personal information is also easy to leak. So will the IPhone 5s touch ID be as insecure as CCTV says?

According to Apple, the new fingerprint sensor in the IPhone 5s is not the same as a conventional fingerprint reader, which uses a frequency signal to detect a "live" fingerprint on the underside of the epidermis, and if the finger is separated from the body, the sensor cannot detect the fingerprint. The traditional fingerprint reader detects dead skin fingerprints on the outside of the finger and is easy to replicate.

So, from this point of view, users do not have to worry about their fingerprints being stolen to unlock the IPhone 5s phone, and thieves will not be stupid to brutally chop off the machine's fingers. In addition, the user's fingerprint information will be stored in the A7 chip's secure Enclave, and will be independently saved, only touch ID sensor to access, other software is not authorized to read, and fingerprint data will not be stored in the Apple server or backup to the ICloud, so does not disclose privacy.

In addition, the IPhone 5s fingerprint recognition in the scanning and locking in the reaction speed, compared to the previous notebook fingerprint recognizer is much faster, the user simply click on the Home button.

But Apple admits that the IPhone 5s's touch ID fingerprint sensor is not perfect and may not function properly if the user's palms are sweaty or wet with water.

An Apple spokeswoman said in an interview with the Wall Street Journal that Apple's testers found that the touch ID fingerprint sensor did not recognize the user's actions each time, when the fingers were sweating or contaminated with other liquids even after wiping the lotion.

In addition to the fingertips contaminated with liquid, it seems that the touch ID fingerprint identification sensor on the user's finger scar is not correctly identified. But an Apple spokeswoman told the Wall Street Journal that the scar problem was easy to solve, as long as the user changed his or her finger to do it.