This document discusses graphical passwords as an alternative to text-based passwords. It outlines the drawbacks of text-based passwords, such as being difficult to remember and vulnerable to brute force and dictionary attacks. The document then proposes a graphical password system that uses images and points of interest on images instead of text for password authentication. This approach aims to make passwords more secure and easier for users to remember.

1. Graphical Password
Authentication
PRESENTED BY:
DHVANI SHAH

2. OUTLINE
Summary:
1.Introduction
-Password
-Authentication
-Methods of Authentication
2. Text-based password
-Drawbacks of text-based passwords
3.Problem Definition
4.Graphical Password
5.Existing Model
6.Proposed Model
7.Conclusion

3. INTRODUCTION
What is PASSWORD?

4. PASSWORD
PASSWORD is a secret word or string of characters that
is used for user authentication to prove his/her identity
and going to access resources
Used for?
Logging into accounts
Retrieving emails
Accessing applications
Used In?
 Networks.
 Websites
 Databases

5. What is AUTHENTICATION?
Conformation of a person’s identity

6. Methods for authentication
Token-based
Biometric-based
Knowledge-based
Key cards, smart
cards
Face recognition, finger print
Text-based, image-based

7. Text-based Password

8. Drawbacks
1) Difficulty of remembering
passwords
Easy to remember : easy
to guess
Hard to guess : hard to
remember
2)Users tend to write the
passwords down or use the
same passwords by
different accounts

9. Drawbacks
3)Brute force attack
4) Dictionary attack

10. PROBLEM DEFINITION
Alpha-numeric passwords have various
disadvantages and to overcome this disadvantages
GRAPHICAL PASSWORD AUTHENTICATION
model has been proposed.

11. User Authentication : Graphical Password
Use graphics (images) instead of alphanumerical
passwords
Why?
 A picture is worth a thousand words
Humans remember pictures better than words
More resistant to brute-force attacks (search space is
practically infinite).

12. REGISTRATION TASK
USER TASK:
U S E R N A M E
NEW USER REGISTER
DATABASE
Click on
NEW USER
REGISTER button
Enter the username in the
username field
Verifies the
username and
store into the
database

13. REGISTRATION TASK
PASSWORD CREATION
Browse
the
image
Selected
image
DATABA
SE

14. LOGIN PHASE
PASSWORD VERIFICATION
Registered
image will
generated
image
Verify
in
DATAB
ASE

15. Example
MOM
LI

16. Two Approaches
Recognition based Recall based
A user is presented
with the set of images
and the user passes the
authentication by
recognizing and
identifying the images
he selected during
registration stage.
A user is asked to
reproduce something
that user has created or
selected earlier during
registration phase

17. FLOWCHART
Start
Upload one image as per
choice
Select POI(point of interest),POI is described as
circle with center and radius
A word or phrase can be associated with thePOI
Selecting
POI
Enforce order Donot enforce order
Stop

18. Advantages
Easy to remember and hard to guess for
others.
Here the security of the system is very
high.
Provide a way of making more human-friendly
passwords .
 Dictionary attacks are infeasible.

19. Existing system
 In existing system, passwords are mostly of
text oriented.
 Larger memory space.
 Some are prone to shoulder surfing attack.

20. Proposed system
In proposed system, author uses a multi-factor
graphical password system.
During password creation, there is a
image associated with text

21. IMPLEMENTATION MODEL
START
Upload one image
as per choice
Select POI(point of interest),POI is described as
square
with center and radius
Enforce order
STOP

22. REGISTRATION TASK
USER TASK:
U S E R N A M E
NEW USER REGISTER
DATABASE
Click on
NEW USER
REGISTER button
Enter the username in the
username field
Verifies the
username and
store into the
database

23. REGISTRATION TASK
PASSWORD CREATION
Browse
the
image
Selected
image
DATABA
SE

24. LOGIN PHASE
PASSWORD VERIFICATION
Registered
image will
generated
image
Verify
in
DATAB
ASE

25. Conclusion
Search space (system parameters):
-picture
-POIs (number and order)
-words associated with POIs
Together, the above parameters define a
very large password space (infinite)
Multi-factor authentication (graphical, text,
POI-order, POI-number)in a friendly
intuitive system

26. REFERENCES
A Graphical Password Authentication System
- Ahmad Almulhem : Computer Engineering Department
 Graphical Passwords: A Concept Survey
- Ibrahim Bumin KARA
William Stallings and Lawrie Brown. Computer Security
- Principle and Practices.
Daniel V. Klein. Foiling the Cracker:
- A Survey of and Improvements to, Password Security.

27. THANK YOU