Implementing 3D Graphical Password Schemes

Abstract

Beginning around 1999, numerous graphical password schemes have been proposed, motivated by the promise of improved password memorability and thus usability, while at the same time improving strength against guessing attacks. Like text passwords, graphical passwords are knowledge-based authentication mechanisms where users enter a shared secret as evidence of their identity. However, where text passwords involve alphanumeric and/or special keyboard characters, the idea behind graphical passwords is to leverage human memory for visual information, with the shared secret being related to or composed of images, parts of images, or sketches. Despite the large number of options for authentication, text passwords remain the most common choice for several reasons.