. If you are given an IDS that has a probability of detection of 85%, and...
. If you are given an IDS that has a probability of detection of 85%, and you were told that the probability of an intrusion is 1%. What should be the false alarm rate of the IDS to have a Bayesian detection rate of 90%?
Homework Answers
Bayesian detection rate = P(Intrusion|Alarm)
and
P(Intrusion|Alarm) = 
So we have 90 = (1 * 85) / P(Alarm)
So P(Alarm) = (85/90) %
= 0.94%
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