Improvement of User Authentication Using Schema of Visual Memory: Exploitation of "Schema of Story"

A user authentication system using "unclear images" as pass-images has been proposed, in which only legitimate users can understand their meaning by viewing the original images corresponding to the unclear pass-images. These unclear images are meaningless to unauthorized users. Hence, it is difficult for attackers to memorize these unclear passimages, even though they may have observed legitimate users' authentication trials. However, as long as the same pass-images are always used, it would not be completely impossible for unauthorized users to memorize unclear-images. Therefore, this paper discusses enhancement to the authentication system by permitting users to memorize a number of pass-images and using a different subset of passimages at all authentication trials. To mitigate the burden imposed by memorizing additional pass-images in the enhanced system, we modified it by extracting a certain number of images from a video sequence. The pass-images were obtained by m...

• Type: Conference
• Year: 2008
• Where: AINA
• Authors: Takumi Yamamoto, Atsushi Harada, Takeo Isarida, Masakatsu Nishigaki
• Keywords: AINA 2008, Computer Networks, Legitimate Users, Unclear Images, Unclear Pass-images