期刊名称：International Journal of Computer Science Issues
印刷版ISSN：1694-0784
电子版ISSN：1694-0814
出版年度：2013
卷号：10
期号：2
出版社：IJCSI Press
摘要：Authentication is one the most important security primitive. Password authentication is most widely used authentication mechanism. Users generally use characters as passwords but text-based passwords are difficult to remember and if they are easy to remember then they are vulnerable to various kinds of attacks and are predictable. To address these authentication problems, a new alternative authentication method have been proposed using pictures as passwords. It is supported by the fact that Human brain has remarkable ability to remember thousands of images with detail. Whereas it difficult to keep text in memory. In Graphical authentication user performs some events on pictures like clicking, dragging, moving mouse etc. In this paper, we conduct a comprehensive survey of the existing graphical authentication systems. We have classified these methods in to three main areas: Recognition based schemes, pure recall based schemes and cued recall based schemes. We will discuss their security and usability issues since efficiency of picture password is measured by these two factors.
