Consider a double IDS with system A and system B. If there is no intruder, the probability that system A sounds an alarm (i.e., a false alarm) is .2

Kaycee Roche

Kaycee Roche

Answered question

2021-08-12

Intrusion detection systems.
A computer intrusion detection system (IDS) is designed to provide an alarm whenever an intrusion (e.g., unauthorized access) is being attempted into a computer system.
A probabilistic evaluation of a system with two independently operating intrusion detection systems (a double IDS) was published in the Journal of Research of the National Institute of Standards and Technology (Nov.–Dec. 2003).
Consider a double IDS with system A and system B. If there is an intruder, system A sounds an alarm with probability .9 and system B sounds an alarm with probability .95.
If there is no intruder, the probability that system A sounds an alarm (i.e., a false alarm) is .2 and the probability that system B sounds an alarm is .1.
If there is no intruder, what is the probability that both systems sound an alarm?

Answer & Explanation

Asma Vang

Asma Vang

Skilled2021-08-13Added 93 answers

the solution is written below
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