A company decided to reduce the cost of its annual cyber insurance policy by removing the coverage for ransomware attacks. Which of the following analysis elements did the company most likely use in…

Question

Options

• AIMTTR
• BRTO
• CARO
• DMTBF

• A
  5% (2)
• B
  13% (5)
• C
  80% (32)
• D
  3% (1)

Explanation

ARO (Annual Rate of Occurrence) is correct because it quantifies how frequently a specific threat - in this case, ransomware - is expected to occur within a year. If the company assessed its ARO for ransomware as very low, the resulting Annual Loss Expectancy (ALE = SLE × ARO) would also be low, meaning the statistical expected loss doesn't justify the insurance premium, making removal of that coverage a financially rational decision.

Why the others are wrong:

• A. IMTTR is not a recognized standard risk metric - it's a distractor with no established meaning in quantitative risk analysis frameworks.
• B. RTO (Recovery Time Objective) defines the maximum tolerable downtime after an incident; it guides recovery planning, not insurance cost decisions.
• D. MTBF (Mean Time Between Failures) measures hardware/system reliability intervals and is used for availability planning, not for evaluating cyber risk insurance coverage.

Memory tip: Think of ARO as the actuarial heartbeat of risk - it's the number that insurance companies themselves use to price premiums. If you calculate a low ARO for a threat, you're essentially saying "this rarely happens," which is exactly the reasoning to drop coverage for it.

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