Pass-image authentication method tolerant to random and video-recording attacks

Yutaka Hirakawa, Motohiro Take, Kazuo Ohzeki

Research output: Contribution to journalArticlepeer-review


User authentication is widely used in many Internet services and is also used by automatic teller machines (ATMs). Recently, there has been an increase in the ATM password thefts using small charge-coupled device cameras. This study discusses a user authentication method in which graphical passwords, instead of alphanumeric ones as, are used to mitigate observation attacks. Several techniques for password authentication have been discussed in various studies. However, there has not been sufficient research on authentication methods that use pass-images instead of pass-texts. This study proposes a user authentication method that is tolerant to serious attacks when a user's pass-image selection operation is video recorded twice. In addition, usage guidelines recommending eight pass-images are proposed, and the corresponding security strength is evaluated.

Original languageEnglish
Pages (from-to)20-36
Number of pages17
JournalInternational Journal of Computer Science and Applications
Issue number3
Publication statusPublished - 2012


  • Graphical password
  • Random attack
  • User authentication
  • Video-recording attack

ASJC Scopus subject areas

  • Computer Science Applications


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