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Graphical password authentication
This document discusses authentication methods and focuses on graphical passwords. It begins with an overview of common authentication methods like text passwords, tokens, and biometrics. It then discusses the drawbacks of text passwords and introduces graphical passwords as an alternative. The document surveys recall-based and recognition-based graphical password techniques and provides examples like Draw-A-Secret and Passfaces. It concludes by noting the advantages of graphical passwords in usability and security but also disadvantages like longer login times and storage requirements.
In this document
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Introduction to authentication methods, overview of text and graphical passwords, survey techniques, and a discussion on advantages and disadvantages.
Definitions and usage of passwords in authentication across various systems, including token and biometric methods.
Text passwords as user authentication methods, their vulnerabilities, and the challenge of memorizing complex passwords.
Introduction to graphical passwords, including their definition, operation, and applications in web and ATM logins.
Explanation of recall-based and recognition-based authentication techniques for graphical passwords.
Various graphical password schemes: Draw-A-Secret, signature scheme, Pass Point scheme, and several user-selected image schemes.
Pros and cons of graphical passwords, including user-friendliness, security, registration time, storage concerns and vulnerability to shoulder surfing.
Summary of graphical passwords as a viable alternative to text passwords, addressing security and usability concerns.
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Graphical password authentication
- 1. PRESENTED BY Asim KumarPathak CS-47/09
- 2. Introduction Overview of theAuthentication Methods Text Password and drawbacks. Graphical Passwords. The survey Recall Based Techniques Recognition Based Techniques Discussion Advantages disadvantages Conclusion
- 3. What is PASSWORD Theterm PASSWORD commonly refers to a secret used for authentication. Passwords are the most commonly used method for identifying users in computer and communication systems. PASSWORDS are used for: Logging into accounts. Retrieving emails. Accessing applications. Networks. Websites Databases workstations
- 4. Token based authentication Key cards, bank cards, smart card, … Biometric based authentication Fingerprints, iris scan, facial recognition, … Knowledge based authentication Text-based passwords, picture-based passwords, … Most widely used authentication techniques
- 5. Text Password Text passwordis a secret word or string of characters that is used for user authentication to prove his identity and gain access to resources. Drawback Difficulty of remembering passwords. easy to remember -> easy to guess hard to guess -> hard to remember Vulnerable to attacks like Dictionary attack, Brute force attack . Many solutions have been proposed. Graphical password is one of the solutions.
- 6. Graphical passwordswere originally described by BLONDER in 1996. A graphical password is an authentication system that works by having the user select from images, in a specific order, presented in a graphical user interface (GUI). For this reason, the graphical-password approach is sometimes called graphical user authentication (GUA).
- 7. Use of graphicalpassword: Web log-in application. ATM machine. Mobile device.
- 8. Recall Based Techniques Auser is asked to reproduce something that he created or selected earlier during the registration stage Recognition Based Techniques A user is presented with a set of images and the user passes the authentication by recognizing and identifying the images he selected during the registration stage
- 9. Draw-A-Secret (DAS) Scheme User draws a simple picture on a 2D grid, the coordinates of the grids occupied by the picture are stored in the order of drawing. Redrawing has to touch the same grids in the same sequence in authentication.
- 10. Signature scheme Here authenticationis conducted by having the user drawing their signature using a mouse.
- 11. Pass Point Scheme Userclick on any place on an image to create a password. A tolerance around each chosen pixel is calculated. In order to be authenticated, user must click within the tolerances in the correct sequence.
- 12. Dhamija andPerrig Scheme Pick several pictures out of many choices, identify them later in authentication.
- 13. Passface scheme: Inthis technique human faces are used as password.
- 14. Sobrado andBirget Scheme System display a number of pass-objects (pre-selected by user) among many other objects, user click inside the convex hull bounded by pass-objects.
- 15. Advantages of Graphicalpassword Graphical password schemes provide a way of making more human-friendly passwords . Here the security of the system is very high. Dictionary attacks and brute force search are infeasible.
- 16. Disadvantages ofGraphical password Password registration and log-in process take too long. Require much more storage space than text based passwords. Shoulder Surfing . - As the name implies, shoulder surfing is watching over people's shoulders as they process information. - Because of their graphic nature, nearly all graphical password schemes are quite vulnerable to shoulder surfing.
- 17. Graphical passwords arean alternative to textual alphanumeric password. It satisfies both conflicting requirements i.e. it is easy to remember & it is hard to guess. By the solution of the shoulder surfing problem, it becomes more secure & easier password scheme. Not yet widely used, current graphical password techniques are still immature.
- 18.