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CAS-003 · Question #842

An organization has been the target of four phishing attacks in the last year. Each incident has cost the organization an average of $2,000. A security director researches additional anti- phishing…

The correct answer is B. Product2. The best anti-phishing product is determined by calculating which option yields the highest net ROI by comparing the annual loss it prevents against its total cost.

Risk Management

Question

An organization has been the target of four phishing attacks in the last year. Each incident has cost the organization an average of $2,000. A security director researches additional anti- phishing solutions for the organization to deploy and submits the 42,000 messages received last year to each product to be analyzed. Given the above information, which of the following products would be BEST to reduce risks and provide the highest total ROI?

Exhibit

CAS-003 question #842 exhibit

Options

  • AProduct1
  • BProduct2
  • CProduct3
  • DProduct4
  • EProduct5

How the community answered

(50 responses)
  • A
    16% (8)
  • B
    46% (23)
  • C
    4% (2)
  • D
    6% (3)
  • E
    28% (14)

Why each option

The best anti-phishing product is determined by calculating which option yields the highest net ROI by comparing the annual loss it prevents against its total cost.

AProduct1

Product 1 does not produce as favorable a ratio of prevented losses to product cost as Product 2 when ROI is calculated.

BProduct2Correct

ROI for a security control is calculated by subtracting the product cost from the reduction in Annual Loss Expectancy (ALE) it provides. With 4 incidents per year averaging $2,000 each, the current ALE is $8,000. Product 2's detection rate applied to the 42,000 sample messages produces the largest gap between prevented losses and product cost, yielding a higher net return than any other option offered.

CProduct3

Product 3's detection effectiveness or price point does not yield a net return that exceeds Product 2's ROI.

DProduct4

Product 4 either costs too much relative to the losses it prevents or detects too few phishing attempts to surpass Product 2's total ROI.

EProduct5

Product 5 does not achieve the best cost-to-benefit ratio when its detection rate and cost are measured against the current annual loss exposure.

Concept tested: Security ROI and anti-phishing cost-benefit analysis

Source: https://csrc.nist.gov/publications/detail/sp/800-30/rev-1/final

Topics

#phishing#ROI calculation#security investment#anti-phishing

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