|COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring.|
Statistical Attacks on Personal Knowledge Questions
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.
This talk is included in these lists:
Note that ex-directory lists are not shown.
Other listsSir Andrew Motion Visits Cambridge in War Poets Event Buddhism Talk on Silent Illumination Meditation Talks related to sustainability and the environment
Other talksModeling the Physical Multi-Phase Interactions of HNO3 Between Snow and Air on the Antarctic Plateau (Dome C) and coast (Halley) Legalism: A Reconstruction and Critique of Judith Shklar's Concept and its Contemporary Import 'Are the dons still a self-governing community of Scholars?' Cambridge Cancer Centre Early Detection Programme Annual Symposium Opinion formation in dynamic social networks Estimation in the Ising blockmodel