International Journal of Advanced Research in Computer Science and Software Engineering (IJARCSSE)
Many security primitives are based on hard mathematical problems. Using hard AI problems for security is emerging as an exciting new paradigm, but has been underexplored. In this paper, the authors present a new security primitive based on hard AI problems, namely, a novel family of graphical password systems built on top of Captcha technology, which they call Captcha as Graphical Passwords (CaRPs). Consumers tend to choose unforgettable passwords that are easy for aggressors to guess, but strong system allotted passwords are hard for users to recall.