1. Backes, M., Drmuth, M., Unruh, D.: Compromising reflections -or- how to read lcd monitors around the corner. In: Proceedings of the IEEE Symposium on Security and Privacy (SSP), Oakland, CA (May 2008)
2. Biddle, R., Chiasson, S., van Oorschot, P.: Graphical passwords: Learning from the first generation. technical report tr-09-09, school of computer science, carleton university (2009)
3. Blonder, G.E.: Graphical passwords. Lucent Technologies, Inc., Murray Hill, NJ, U. S. patent, ed. United States (June 1996)
4. Blum, L., Blum, M., Shub, M.: A simple unpredictable pseudo-random number generator. SIAM Journal on Computing 15(2), 364–383 (1986)
5. Lecture Notes in Computer Science;C. Herley,2009