Graphical passwords based on robust discretization

Jean Camille Birget, Dawei Hong, Nasir Memon

Research output: Contribution to journalArticlepeer-review

46 Scopus citations


This paper generalizes Blender's graphical passwords to arbitrary images and solves a robustness problem that this generalization entails. The password consists of user-chosen click points in a displayed image. In order to store passwords in cryptographically hashed form, we need to prevent small uncertainties in the click points from having any effect on the password. We achieve this by introducing a robust discretization, based on multigrid discretization.

Original languageEnglish (US)
Article number1673401
Pages (from-to)395-399
Number of pages5
JournalIEEE Transactions on Information Forensics and Security
Issue number3
StatePublished - Sep 2006

All Science Journal Classification (ASJC) codes

  • Safety, Risk, Reliability and Quality
  • Computer Networks and Communications


  • Images
  • Passwords
  • Robust discretization


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