Global ETD Search

1	A Design and Analysis of Graphical Password Suo, Xiaoyuan 03 August 2006 (has links) 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, I conduct a comprehensive survey of the existing graphical password techniques. I classify these techniques into two categories: recognition-based and recall-based approaches. I discuss the strengths and limitations of each method and point out the future research directions in this area. I also developed three new techniques against the common problem exists in the present graphical password techniques. In this thesis, the scheme of each new technique will be proposed; the advantages of each technique will be discussed; and the future work will be anticipated. Authentication Security Survey Password space Graphical password
2	A shoulder-surfing resistant graphical password system Alesand, Elias, Sterneling, Hanna January 2017 (has links) The focus of this report is to discuss graphical password systems and how they can contribute to handle security problems that threaten authentication processes. One such threat is shoulder-surfing attacks, which are also reviewed in this report. Three already existing systems that are claimed to be shoulder-surfing resilient are described and a new proposed system is presented and evaluated through a user study. Moreover, the system is compared to the mentioned existing systems to further evaluate the usability, memorability and the time it takes to authenticate. The user study shows that test subjects are able to remember their chosen password one week after having registered and signed in once. It is also shown that the average time to sign in to the system after five minutes of practice is within a range of 3.30 to 5.70 seconds. The participants in the experiments gave the system an average score above 68 on the System Usability Scale, which is the score of an average system. shoulder-surfing resistant graphical password system guessing attacks graphical passwords recognition-based recall-based pure recall-based password security password space pictorial superiority effect brute-force attack dictionary attack hot-spots memorability graphical components authentication Computer Sciences Datavetenskap (datalogi)

Search results

A Design and Analysis of Graphical Password

A shoulder-surfing resistant graphical password system