Fingerprint scanners work by first obtaining an image of a fingerprint using either an optical or capacitive scanner. An optical scanner uses light and a charge coupled device like in a camera to capture the fingerprint image, while a capacitive scanner uses electrostatic sensing to analyze fingerprint ridges. The scanner then analyzes features called minutiae from the fingerprint to identify and compare with stored prints, rather than doing a direct image comparison. While fingerprint identification has advantages like being hard to forge, its main drawback is the inability to change your fingerprint if compromised.

1. How Fingerprint scanners Work
● To begin with, computerized fingerprint
scanners have been a mainstay of spy thrillers
for decades, but up until recently, they were
pretty exotic technology in the real world. In
addition to the password, you need to get a
unique print access.

2. Fingerprint Basics
Naturally resulting fingerprints, it also shapes
differ from person to person. In other words, it
becomes a place of ID cards. It was born in an
ultra-complex mechanism. But there is a slight
difference so twins.

3. Optical Scanner
● This optical system to obtain the first image of
your fingers. Then analyze and parse it. The
heart of the optical scanner, a charge coupled
device (CCD), the same light sensor system
used in digital cameras and camcorders.

4. Capacitance Scanner
● There are other ways to scan your fingerprint.
It's Capacitance Scanner. Way to analyze the
electrostatic sensor captures fingerprint relief.
The main advantage of the capacitive scanner,
rather than the actual shape of the fingerprint, is
that you need light and dark patterns that make
up the visual impression of the fingerprint. This
system is a difficult trick. In addition, they are
not chips, because it uses a CCD unit,
capacitive scanners, optical devices, tend to be
more compact.

5. Analysis
● In the film, etc., there is the scene overlap of
fingerprints for fingerprint images. But this is not
an effective way, even theft of data would be
easy. Instead, most fingerprint scanner
systems, specific features of the fingerprint that
is commonly known, the minutiae to be
compared.

6. Pros and Cons
● The important thing is there are several security
systems. (What you have. That you know
nothing. Who are you.) Also, be aware of the
same person we need in the past. The
fingerprint is also a number of advantages.
Difficult to counterfeit or indelible fingerprint
removal, etc.. But the biggest drawback is that
you sure do not. I have divided the pros and
cons of this point.