1. Document Version 1.0
Document ID TSS15W004
Document Title Project Abstraction Specification
Project Abstraction Specification Private & Confidential 1/2
Image based Password authentication for Illiterates
with touch screen
ABSTRACT:
The authentication is the key issue everywhere like industries and homes. The
commercial authentication methods involves the password based and conventional lock based
authentication. The main drawback with this commercial methods ia remembering the passwords
and carrying the keys. The passwords will be difficult to remember in case of the authenticated
person is illiterate. They can’t remember the letters and digits as they don’t know them.
The project is aimed to implement an authentication system for industrial/house hold
applications for accessing the appliances by using a ‘Picture Password’ technique. Here we are using
a touch screen module to interface with microcontroller. The touch screen input is a smart technique
for getting the inputs with a finger touch recognition.
The touch screen module will be having some images on it. By using this images, we can
create a password combination with the images. The following figure shows a sample picture
combination.

2. Document Version 1.0
Document ID TSS15W004
Document Title Project Abstraction Specification
Project Abstraction Specification Private & Confidential 2/2
The person needs to touch the pictures in a predefined combination, then the microcontroller
will decode the password and compares with the predefined password. If the password is matched,
then the user will be authenticated and allowed to access the appliances. The pictures will be easy
to remember rather than a password for illiterates.
Block Diagram
16x2 LCD
Microcontroller
Power Supply
Touchscreen
Module
Relay 1
Button 1
Button 2
Relay 2
Device 1
Device 2