This document discusses defenses against password guessing attacks using persuasive click points. It introduces traditional graphical password systems and classifications of passwords. It outlines the disadvantages of existing systems like tokens, knowledge-based passwords, and biometrics. The document then describes Persuasive Cued Click Points (PCCP), which uses a viewport to guide users to select more random passwords within an image. PCCP provides advantages like being easier to remember than alphanumeric passwords while providing better security against brute force and dictionary attacks.

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Defenses Against Password Guessing Attacks By Using Persuasive Click Point
Presentation On :-
Presented By :-
Saurav Sinha
(Computer Science Engg.)

2. Contents
 Objective
 Traditional Graphical Password System
 Classification of Passwords
 Disadvantages of Existing System
 Persuasive Cued Click Points (PCCP)
 System Architecture
 Advantages
 Conclusion
 References
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3.  Objective
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 To force users to select more random, and difficult passwords
to guess.
 To provide better security and easy to remember passwords in
the form of pictures.
 To provide more secure authentication.
 To provide user friendly environment to create password.

4.  Traditional Graphical Password System
1. Recognition Based Techniques
2. Recall based techniques :-
Pass Points (PP)
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5. Classifications of passwords5

6.  Disadvantages Of Existing System
Token based system requires support of knowledge
based system (Keys, Smartcards etc.)
Knowledge based passwords are easily cracked by brute
force and dictionary attacks (Text & Alphanumeric
numbers)
Biometrics based system is more complex and costly
(Fingerprint, Retina, Face Geometry etc.)
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7. Persuasive Cued Click Point (PCCP)
 Select a click-point
within the view port.
 Shuffle button to
randomly reposition
the view port
 View port guides users
to select more random
passwords
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8. System Architecture
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10. Advantages
 Better to remember a picture then an alphanumeric passwords.
 More restrictive against brute force and dictionary attacks
 More effective in preventing password guessing attacks
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11.  Conclusion
 There is a growing interest for Graphical passwords since they are
better than Text based passwords, although the main argument for
graphical passwords is that people are better at memorizing
graphical passwords than text-based passwords
 Persuasive Click point method provides greater security than other
password methods.
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12. References
Wikipedia
Google
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13. Thank You
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