Many security primitive’s ar supported hard mathematical problems. Victimization hard AI issues for security is rising as AN exciting new paradigm, however has been beneath explored. During this paper, we tend to gift replacement security primitive supported hard AI problems, namely, a unique family of graphical parole systems engineered on high of Captcha technology that we tend to decision Captcha as graphical passwords (CaRP). CaRP is each a Captcha and a graphical parole theme. CaRP addresses variety of security issues altogether, like on-line guess attacks, relay attacks, and, if combined with dual-view technologies, should ensuring attacks. Notably, a CaRP parole is found solely probabilistically by automatic on-line guess attacks notwithstanding the password is within the search set. CaRP conjointly oers a unique approach to deal with the well-known image hot spot drawback in in style graphical pass-word systems, like Pass-Points, that always results in weak pass-word selections. CaRP isn't a anacea, however it overs cheap security and usefulness and seems to sit well with some sensible applications for up on-line security.