Table 11 Authentication success rate after answering different ♯ of questions aggregated across all sessions and using all possible combinations of eight response features for Bayesian classifier based scheme in Study ‐ 2
From: Designing challenge questions for location‐based authentication systems: a real‐life study
♯ of questions\ | Against naive | Against strong+ | Against strong | |||
|---|---|---|---|---|---|---|
against adversary | adversaries | Naive adversaries | adversaries | |||
lr)2‐3lr)4‐5lr)6‐7 | Legitimate | Naive | Legitimate | Strong+Naive | Legitimate | Strong |
N = 2 | 91.6 % | 14.9 % | 87.4 % | 23.0 % | 82.2 % | 25.6 % |
N = 4 | 96.4 % | 11.0 % | 93.3 % | 18.2 % | 89.5 % | 24.5 % |
N = 6 | 98.1 % | 5.7 % | 95.6 % | 14.2 % | 94.1 % | 19.9 % |