A Novel Graphical Password Authentication Scheme

Abstract

The most common computer authentication method is to use alphanumerical usernames and passwords. This method has been shown to have significant drawbacks. For example, user tends to pick passwords that can be easily guessed. On the other hand, if a password is hard to guess, then it is often hard to remember. In this paper, we 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 we call Captcha as graphical passwords (CaRP).
Key Words— Graphical password; password; hotspots; CaRP; Captcha; dictionary attack; password guessing attack; security primitive