User-Choice Patterns in PassTiles Graphical Passwords
نویسندگان
چکیده
Graphical passwords are an alternative to text passwords, with advantages to both usability and security. We investigate PassTiles, a research graphical password system, and look specifically at user-chosen PassTiles passwords. We examine whether having a blank background or a background image affects patterns and hot-spots. We found reduced entropy in both conditions due to patterns, which weakens the scheme against guessing attacks, and suggests that different approaches to memorability might be more appropriate.
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