Authentication by Equalizing the Graphical Bars

Today, user authentication is one of the important topics in computer era. Powerful text-based password schemes could provide with certain degree of security. However, the fact that strong passwords are difficult to remember sometimes leads their own users to write them down on papers or even save them in a computer file. Graphical User Authentication (GUA) has been proposed as a possible alternative solution to text-based authentication, motivated particularly by the fact that humans can remember images better than text. In recent years, many networks, computer systems and Internet based environments try used graphical authentication technique for their customers logged in. All of graphical passwords have two different aspects which are usability and security. Different techniques for graphical systems have been proposed in literature over the past few years such as-Recognition Based Technique [2], Recall Based Technique [2]. This paper presents a survey of comparative study between different techniques of GUA.