Abstract or Summary:
Proactive password checkers have been widely deployed on the user registration pages of many web sites. All password checkers we are aware of show the estimated security strength as a 1-D bar with a textual description and/or a numeric strength score. Some password checkers also provide hints about how to choose stronger passwords, but very few reveal detail about the underlying password strength estimation algorithm.

This poster presents a novel scheme for designing password checkers which provides users with immediate feedback about multiple threats detected on the current password choice through 2-D visual guidance in order to influence users to define stronger passwords based on the visual feedback.