When Face Unlock feature was first introduced by update Ice Cream Sandwich, Android fans immediately responded with a test level of safety. They soon discover that this feature is very easy to be tricked by using images of the cell phone owner.
But it will no longer be done on OS Jelly Bean, because Google has presented a new feature to minimize the gap. This feature is called ‘liveness check,’ where the user will be asked to blink an eye to unlock their phones.
Once the application is to recognize your face (where the process has become much faster than before), a short message ‘blink now’ will be present on the screen and asks you to blink, and your phone will open after you blink an eye.
To enable this feature (if your device is operated using the Android 4.1 Jelly Bean), access Settings> Security, then select the option Face Unlock your lock screen. When finished, click the option ‘liveness check,’ and voila!
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