Fingerprint recognition on smartphones has several applications and advantages. It uses capacitive sensors to read unique ridge patterns to unlock phones or make payments. While convenient, fingerprints can be contaminated and hackers could access lost devices. Most survey respondents said it was convenient but had room for improved sensitivity. Further development aims to address issues so fingerprint recognition becomes more widely used and beneficial.

1. Fingerprints recognition on
Smartphone
GCIT 1015 IT INNOVATIONS SHAPING OUR WORLD
16215532 LAM HO WAH GORDON
16220757 CHENG NGA MAN
16222504 YEUNG, ELAINE YU PING
16222598 TANG CHUN YI KELLY
26 October ,2016

2. Contents
Introduction of
fingerprints
recognition
Applications
Advantages &
disadvantages
Survey Results
Future development
and conclusion

3. Background
▶ Fingerprint identification is one of the most well-known and publicized
biometrics.
▶ As fingerprints offer a reliable means of personal identification , they have
been used for identification for over a century.
▶ And this technology is used in the mobile phone since 2007,by Toshiba.

4. Principle
▶ Capacitive fingerprint scanners are the type mostly used in smartphones. They
work properly if the distance is short enough so that electricity can be transferred
from the capacitors and the skin
▶ Fingerprint is unique and full of ridges and valleys. Ridges are closer to the
capacitor, and more electricity will flow away. Your fingerprint can be read by the
sensor due to this characteristic.

5. Type
▶ There are mainly two types of fingerprint recognition on smartphone. They are
swipe-style and one-touch/press style respectively.
▶ Swipe-style
During movement of the finger the electrical field will change dependent on the
distance between the sensor surface and the ridges and valleys of the fingerprint.
Video clip - Swipe style fingerprint recognition

6. Type
▶ One-touch/press style
With just a touch or a press of your device's Home button, the sensor quickly
reads your fingerprint and automatically unlocks your phone.
Video clip - One-touch/ press style

7. Components
▶ As shown in the diagram, each sensor consists of
arrays of cells. These cells have two conductor
plates, which are covered with an insulating layer.
Thus, they form a simple capacitor which is used to
store the charge.These sensors will then be
connected to an integrator. The output of the
integrator will be given to the input of an inverting
operational amplifier. This op-amp will consist of
hundreds of transistors, resistors and capacitors. This
op-amp is alters the input voltage with respect to the
reference voltage provided to the other input. The
non-inverting input is connected to the ground. The
inverting input is given to the reference voltage and
then to the feedback circuit. This feedback circuit is
given to the amplifier output and also includes the
two conductor plates.

8. Applications and examples
▶ 1.Unlock the mobile
Since everyone has unique fingerprint, it can be served as a personal identification
in the fingerprint recognition. People can unlock the phone by putting the finger on
Home button or swipe the finger from top to bottom of the sensor.It enhances the
security of the mobile phones.
▶ 2. Purchase in App stores
People now make payment while purchase applications in the App Store on their
iPhones and iPads and they are able to authorize Play Store purchases with the
fingerprint. This help them save time when online shopping.
▶ 3.Banking
Most banking apps have started integrating the fingerprint sensor, so we can
make transactions with a tap to the sensor.

9. Applications and examples
▶ 4. Use Home Button Without Pressing the Button
We can use the fingerprint sensor as an alternative for capacitive touch button,
you can install and use the app easyHome for Samsung from the Play Store.
▶ 5.Auto Login to Websites
The fingerprint sensor can act as a second layer of security while filling out the
credentials. Every time people log on requires the saved credentials, they will be
auto-logged into the website after the verification.

10. Advantages
1) Convenient
▶ It is convenient to use fingerprint recognition as it can be an alternative to your
password for online payment, simplifying the process of purchasing online, or for
locking and unlocking the devices, and we can remember fewer passwords. For
example, apple pay, you can use your fingerprint to make the payment and you
can buy apps, videos and musics on ITunes.
2) Secure
▶ It is secure to use fingerprint for recognition on smartphones because human
fingerprint contain unique whorls and ridges that would be difficult to be duplicate
and counterfeited.

11. Disadvantages
1) Sensitivity
▶ The device should be clean enough to facilitate effective scanning. The scanner
can be easily contaminated by dust or oil on our hands and lose its accuracy.
Also, the moisture on the home button or our fingertips can keep our fingerprints
from being registered.
2) May cause security problem toward the endpoint data protection
▶ devices using fingerprint for recognition may do not utilize a password to lock
their hardware. This can present a considerable threat to to endpoint data
protection. For example if an individual’s unlocked device is lost or stolen, hackers
have easy access to any sensitive content contain there.

12. Online Survey
▶ Target Audience: general public
▶ Information: Fingerprints recognition on Smartphone
▶ Website: https://goo.gl/forms/jfGgHOU8LbinVfgI3

13. Survey Results
▶ Most people think that it is
convenient and intelligent.
▶ A minority of people think
that it maybe not sensitive
enough or troublesome.

14. Survey Results
▶ A majority of people have
experiences on using this
technology, it shows that
this technology has high
popularity.

15. Survey Results
▶ Many people agree that this
technology is convenient and
secure enough after using it.
▶ But a minority of people think
that it may esay to have
technical problems.

16. Survey Results
▶ A majority of people think the
sensibility of the technology
still have the room of
improvement.

17. Further development & Conclusion
▶ According to a market research from IHS, approximately 50% of smartphones sold
by 2019 are expected to integrate an embedded fingerprint sensor. As we can see,
inevitably, smartphone with fingerprint recognition will become dominant in the
future.
▶ Although there are some concerns about the insecurity and inconvenience of the
fingerprint recognition technology , we all believe that it can be improved regarding
the breakthrough in science and technology. Fingerprint recognition, expectedly, will
be used for other purposes and beneficial to our daily life.

18. The End