31-05-2012, 05:37 PM
GRAPHICAL PASSWORD AUTHENTICATION
GRAPHICAL PASSWORD AUTHENTICATION.doc (Size: 328 KB / Downloads: 192)
Abstract
The most common computer authentication method is to use alphanumerical usernames and passwords. This method has been shown to have significant drawbacks. For example, users tend to pick passwords that can be easily guessed. On the other hand, if a password is hard to guess, then it is often hard to remember.
To address this problem, some researchers have developed authentication methods that use pictures as passwords. In this paper, we conduct a comprehensive survey of the existing graphical password techniques. We classify these techniques into two categories: recognition-based and recall-based approaches. We discuss the strengths and limitations of each method
and point out the future research directions in this area.
INTRODUCTION
Human factors are often considered the weakest link in a computer security system. pointout that there are three major areas
computer interaction is important: authentication, security operations, and developing secure systems. Here we focus on the authentication problem.On the other hand, passwords that are hard to guess or break are often hard to remember. Studies showed that since user can only remember a limited number of passwords, they tend to write them down or will use the same passwords for different accounts. To address the problems with traditional username-password authentication, alternative authentication methods, such as biometrics, have been used. In this To address the problems with traditional username-password authentication, alternative authentication methods.
Recognition Based Techniques
Dhamija and Perrig proposed a graphical authentication scheme based on the HashVisualization technique . In their system, the user is asked to select a certain number of images from a set of random pictures generated by a program . Later, the user will be required to identify the pre selected images in order to be authenticated.
Conclusion:
The past decade has seen a growing interest in using graphical passwords as an alternative to the traditional text-based passwords. In this paper, we have conducted a comprehensive survey of existing graphical password techniques. The current graphicalpassword techniques can be classified into two categories: recognition-based and recall-based techniques..