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Table 8 Time taken for legitimate and adversarial users to answer different types of questions

From: Evaluating smartphone-based dynamic security questions for fallback authentication: a field study

  Legitimate Strong Naive
Mean Median SD Mean Median SD Mean Median SD
Activity 18.11 13 17.15 13.96 9 15.47 8.45 6 9.95
Battery 14.15 9 21.44 10.42 7 11.47 7.00 4 7.41
App 18.70 14 14.43 18.68 14 17.16 14.75 12 11.00
Music 20.55 13 28.88 25.79 17 31.77 13.73 9 21.96
Call 15.51 11 13.20 7.53 5 9.52 6.96 5 7.26
SMS 17.99 12 17.88 7.88 5 9.91 7.34 5 7.57
Location 28.56 23 19.05 18.79 15 12.98 14.94 11 11.05
  1. The time unit is in seconds