2. CONTENTS
1. INTRODUCTION
2. CURRENT AUTHENTICATION METHODS
3.DRAWBACKS OF NORMAL PASSWORD
4.WHY DO WE USE GRAPHICAL PASSWORD?
5. RECOGNITION BASED TECHNIQUES
6.RECALL BASED TECHNIQUES
7.CONCLUSION
8.REFERENCES
9.WORDS OF GRATITUDE
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3. Introduction
Current authentication methods
Token based authentication
( key cards,bank cards,smart cards)
Biometric based
(fingerprint,iris scan,facial recognition)
Knowledge based
(text based and picture based passwords)
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5. Introduction
Current authentication methods
Token based authentication
( key cards,bank cards,smart cards)
Biometric based
(fingerprint,iris scan,facial recognition)
Knowledge based
(text based and picture based passwords)
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7. Introduction
Current authentication methods
Token based authentication
( key cards,bank cards,smart cards)
Biometric based
(fingerprint,iris scan,facial recognition)
Knowledge based
(text based and picture based passwords)
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10. Drawbacks of normal password
Easy to guess
Harder passwords are not easy to remember
Dictionary attack-successively trying all the
words in an exhaustive list called a dictionary
Bruteforce attack-tries to use every possible
character combinations as a password
Key-space is limited to 64 ASCII characters
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11. Why do we use graphical
password?
More secure
More memorable
Easier for people to use
A picture worth thousand passwords
Offers much larger keyspace
Cued recall,which helps users to remember a
password based on picture displayed and not
just memory alone
Divided into two-recognition method and
recall based methods
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13. Recognition based technique
A user is presented with a set of
images and the user passes the
authentication by recognizing and
identifying the images he or she
selected during the registration stage
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14. Methods for recognition based
technique
Dhamija and
Perrig algorithm
Sobrado and Birget algorithm
Jansen et al. algorithm
Passface algorithm
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16. User will be asked to select certain
number of images from a set of random
pictures generated by a program
Later, user will be required to identify
the pre-selected images to be
authenticated
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18. Sobrado and Birget algorithm
Overcome the shoulder-surfing attacks
Login time can be reduced
Several schemes are there, eg.triangle
scheme,moveable frame scheme,special
geometric configuration scheme
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20. A user needs to selects their pass-object
among many displayed object
To be authenticated, a user needs to
recognize all the pre-selected pass-object
which was selected during the registration
phase.
The user requires to click inside the
convex-hull which formed by the passobject
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22. This scheme is similar to their previous
scheme but, only three pass objects were
involved in this technique.
One of the pass-objects is placed into the
moveable frame.
To be authenticated, the user needs to
rotate the frame until all the pass-object is
located in a straight line
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23. Jansen et al. algorithm
Select a sequence of thumbnail photo to form a password
Designed especially for mobile devices such as PDAs
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24. Throughout the password creation, a user
has to select the theme first e.g. sea and
shore,
Afterward, a user has to selects and
registers a sequence of the selected
thumbnail photo to form a password .
The user needs to recognize and identify
the previously seen photos and touch it by
using stylus with the correct sequence in
order to be authenticated
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26. Based on the assumption that human can
recall human faces easier than other
pictures
User are requires to select the previously
seen human face picture from a grid of
nine faces which one of the face is the
known face and the rest is the decoy faces
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27.
This step continuously repeated until all
the four face is identified. User needs to
recognize all the face selected during the
enrollment stage. User is authenticated if
all the correct face is successfully
identified.
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28. Takada and koike
Allow
users to use their favourite image
for authentication
First register their favourite images with
the server
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29. Recall based techniques
A user is asked to reproduce
something that he or she created or
selected earlier during the registration
stage
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30. Methods for recall based techniques
Passlogix scheme
DAS scheme
Signature scheme
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32. User can select their background
images based on the environment, for
example in the
kitchen, bathroom, bedroom or etc
To enter a password, user can click
and/or drag on a series of items within
that image.
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33.
For example in the kitchen environment,
user can prepare a meal by selecting
cooking ingredients, take fast food from
fridge and put it in the microwave oven,
select some fruits and wash it in
washbasin and then put it in the clean
bowl.
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36. Conclusion
In this paper, we have conducted a
comprehensive study of existing graphical
password techniques
We have found that the graphical
passwords schemes is more difficult to be
cracked by using the traditional attack
methods.
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