the cups blog

07-24-08

Securing Passfaces for Description

Paul Dunphy, James Nicholson and Patrick Olivier

Study 1:

  • 18 participants (9m, 9f) , 45 faces (27f, 18m)
  • Record descriptions of 15 faces each
  • Results: Females made longer descriptions, used more words to describe them

Study 2:

  • 56 partcipants (31m, 25f)
  • Within-subject with conditions:
    • Random decoys
    • Visually similar decoys (used a separate set of participants to group similar matches)
    • Descriptively similar decoys
  • Task: participant to choose 5 correct passfaces from descriptions to login.
  • Results:
    • Average score in random condition best
    • 9% of logins were successful (7 in random, 5 in visual, 1 in verbal).

Discussion

  • Decoy grouping effective
  • Overall login success low
  • Is there an impact on memorability/shoulder surfing?
  • What about related graphical schemes?