University of Cambridge > Talks.cam > Computer Laboratory Security Group meeting presentations > Statistical Attacks on Personal Knowledge Questions

Statistical Attacks on Personal Knowledge Questions

Add to your list(s) Download to your calendar using vCal

If you have a question about this talk, please contact Jonathan Anderson.

When passwords fail and hardware or biometrics are infeasible, many systems still rely on personal knowledge questions for human authentication. In the past year, high-profile accounts of Twitter executives and US politician Sarah Palin were compromised by guessing personal knowledge questions. This talk will discuss the range of attacks on personal knowledge-based protocols. The speaker will then introduce new research on statistical guessing attacks, including information-theoretic models of guessing and their security implications when applied to real-world probability distributions of the names of people, pets, and places. Finally, possible countermeasures based on active shaping of user’s answer choices will be analysed.

This talk is part of the Computer Laboratory Security Group meeting presentations series.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.

 

© 2006-2024 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity