Live Finger Detection(LFD) is a patent pending technology developed by Futronic to stop the access to secured data and location by using fake fingers made from silicone, rubber, play-doh, etc.
Futronic uses active sensing technology to detect live human finger. In Futronic optical fingerprint scanner, a special signal is emitted to the finger to be authenticated. This signal goes beyond the human skin and then returns to sensor inside the scanner. The returned signal of a live human finger is unique compared to that from any other material. Futronic has developed an algorithm to differentiate the returned signal of live human finger from that of all other material. As a result, Futronic optical fingerprint scanner only captures the fingerprint of live fingers and rejects all other material that puts on it. Fake fingers made from silicone, rubber, play-doh, etc, cannot be used to get access through Futronic optical fingerprint scanner.
To make the LED working properly, users need to put the finger on scanner more carefully and accurately. It is because the finger must touch a special location on the fingerprint scanner for the LFD signal and sensor to work on. The following pictures illustrate how to put finger on scanner for the LED to work properly.
If a finger is not put on scanner accurately according to the above pictures, it may be rejected because it cannot be detected by the scanner as a live human finger. When this happens, please take away finger and try to put finger again. After several trial, it is easy to get used to it.
Some users may feel that it is quite inconvenient to use LED function. But it is worthwhile to sacrifice convenience a bit for enhanced security. Moreover, the FLD function can be de-activated in all Futronic products for applications that enhanced security against fake fingers is not necessary.
