Image based password authentication using touchscreen basically designed for illiterate for their security system.Since image are easily to recall than strings of character.
2. Table of Content
Introduction
Hardware Description
Advantages and disadvantages
Procedural steps for compilation, simulation and
dumping
Conclusion
References
3. Introduction
The main aim of this project is to provide a security system
for illiterates.
Since the images are more easily to recalling in comparison
to string of character.
The images are displayed on touch screen ,one can enter
correct sequences of images get authenticated.
Gives exposure about how touch screen interface in our
practical life.
It can be easily installed in industries ,houses ,poultry form
for security .
5. Hardware Description
The major building blocks of this project are:
Regulated power supply with voltage regulator
Micro controller
Touch screen sensor
Stepper motor
Buzzer
7. Microcontroller (PIC16F72)
1.
2.
3.
a.
The microcontroller used in this
project is PIC16F72.
The PIC families of microcontrollers
are
developed
by
Microchip
Technology Inc.
PIC microcontrollers:
PIC12CXXX 12/14-bit program word .
b.
c.
d.
PIC 16C5X 12-bit program word .
PIC16CXXX and PIC16FXXX 14-bit
program word .
PIC17CXXX and PIC18CXXX 16-bit
program word.
8. Technologies of Touch Screen
There are a number of types of touch screen
technology.
1. Resistive
2. Surface acoustic wave
3. Capacitive
4. Surface capacitance
5. Projected capacitance
6. Infrared
7. Strain gauge
8. Optical imaging
9. Working of Resistive Touch screens
1. Polyester Film
2. Upper Resistive
3.
4.
5.
6.
7.
circuit Layer
Conductive ITO
(Transparent Metal
Coating).
Lower Resistive
Circuit Layer
Insulating Dots
Glass/AcrylicSubstrat
-e
Touch screen
10. Continue….
The contact can close
the switch an generated
Voltages.
Touch screen controller
convert it into (X,Y)
Co-ordinate system and
hence the position of
touch is sense by
controller easily.
11. Stepper motor
It is gear based motor.
The stepper motor are connected
with ULN2803 driver.
When the correct password
entered the lock attached to the
motor is open.
12. Buzzer
Basically it works as sound source
based on piezoelectric diaphragm.
It is consists of electrode ,when dc
voltage applied across electrode
produces sound.
To switch on buzzer -high 1
To switch off buzzer -low 1
13. Advantages
Easily recalling.
Image based password is more secure than text based
password.
Less vulnerable.
Easily installation method.
14. Disadvantages
Since it is totally based on password hence shoulder
surfing can reduce the security of system.
Taken more prevention for touch screen safety.
15. Procedural steps for compilation,
simulation and dumping
PIC compiler is used for programming.
After programming run the programs, it generated a
.hex extension file.
The .hex extension file are dumping into
microcontroller using PIC kit programmer.
16. Conclusion
Image password is easily remember than string of
character password.
Image password is more secure than text based
password.
Less vulnerable by attacker.
Know the exposure of touch screen interface in
practical life.
Shoulder surfing reduce the security of system.