A Secure Recognition Based Graphical Password by Watermarking

One of the most important topics in information security today is user authentication. There is a good security when using the text-based strong password schemes but often memorizing the password is so difficult and users writing them down on a piece of paper or saving inside the computer. There is an alternative solution to the text-based authentication which is the GUA (Graphical User Authentication) or simply Graphical Password based on the fact that humans tend to remember images better. This type of interface provides an easy to create and remember passwords for the users. However, one big issue that is plaguing GUA is shoulder surfing attack that can capture the users mouse clicks and image gallery attack that can change the images of the gallery with physical attack. In this paper, we will propose a new algorithm that using watermarking technique as the solution to solving image gallery attacks and using the random character set generation for each image for resistance to shoulder surfing attack to provide better system security. All the information images in registration phase will be process by copy right protection of watermarking where the login page will check this information for security purposes. Here, we will evaluate and analyze six types of the more common graphical password attack methods.