Deja Vu project page
Adrian's Deja Vu links
firstname.lastname@example.org - Adrian Perrig
Current secure systems suffer because they neglect the importance of human factors in security. We address a fundamental weakness of knowledge-based authentication schemes, which is the human limitation to remember secure passwords. Our approach to improve the security of these systems relies on recognition-based, rather than recall-based authentication. We examine the requirements of a recognition-based authentication system and propose Déjà Vu, which authenticates a user through her ability to recognize previously seen images. Déjà Vuis more reliable and easier to use than traditional recall-based schemes, which require the user to precisely recall passwords or PINs. Furthermore, it has the advantage that it prevents users from choosing weak passwords and makes it difficult to write down or share passwords with others.
We develop a prototype of Déjà Vuand conduct a user study that compares it to
traditional password and PIN authentication. Our user study shows that 90% of
all participants succeeded in the authentication tests using Déjà Vuwhile only
about 70% succeeded using passwords and PINS. Our findings indicate that
Déjà Vuhas potential applications, especially where text input is hard (e.g.,
PDAs or ATMs), or in situations where passwords are infrequently used (e.g., web site passwords).
Keywords: Human factors in security, hash visualization, user authentication through image recognition, recognition-based authentication.