Providing Security Using CAPTCHA: Captcha as A Graphical Password

Abstract

Various security primitives uses hard mathematical problems. Use of hard AI problems for security is emerging and exciting new pattern, but has not yet been explored. In our project, we present a new security primitive based on hard AI problems, this system is named as Captcha as graphical passwords (CaRP). CaRP is Captcha as well as graphical password scheme. CaRP symbolize a number of security problems together, such as online guessing attacks, relay attacks, and shoulder-surfing attacks. Generally, a CaRP password can be found only probabilistically by automatic online guessing attacks even if the password is in the search set CaRP also offers well approach to address the well-known image hotspot problem in popular graphical password systems, like PassPoints, that generally leads to choices of weak password.