It is proven that two persons can hardly possibly have exactly the same fingerprints, as far as two like fingerprints would be found only once every 1048 years. Thus, using door secure system or employee’s time attendance-tracking system with built-in fingerprint recognition is considered to be safe. Because, if your fingerprint sample have already been entered to the database, then the machine will always recognize and match the sample with your fingerprint, while stranger’s fingerprints will be rejected. That is the way fingerprint recognitions enhance our freedom, as long as it allows us keeping our properties private, being safe from criminal strangers.
However, there are evidences that refute this. Both optical and ultrasonic fingerprint recognition systems could be cheated just with printed image or jelly print (alike to real finger with 3D effects) of the fingerprint. The Discovery channel show “The Myth busters” has proven it with their quite convincing experiments. They tried to get access to the door with fingerprint lock with different options of prints and have come to that the myth