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Table 6 Time taken for legitimate and adversarial users to answer Type ‐ 4 questions

From: Designing challenge questions for location‐based authentication systems: a real‐life study

  Mean SD Median Skewness Kurtosis
Legitimate Users 27.80 26.097 19.00 3.160 13.226
Strong Adversarial Users 24.38 27.024 17.00 4.366 26.272
Naive Adversarial Users 17.91 17.804 13.00 5.274 48.169