Single loss expectancy: The expected monetary loss every time a risk occurs is called the Single Loss Expectancy. The Single Loss Expectancy (SLE), Exposure Factor (EF) and Asset Value (AV) are related by the formula: SLE = EF * AV Introducing this conceptual breakdown of Single Loss Expectancy into Exposure Factor and Asset Value allows us to adjust the two terms independently and is related to risk management and risk assessment. Asset Value may vary with market changes, inflation while Exposure Factor can be reduced by enabling preventive measures. Annualized loss expectancy: The product of the single loss expectancy (SLE) and the annual rate of occurrence (ARO) give annualized loss expectancy (ALE). It is mathematically expressed as: ALE = SLE * ARO The important feature of Annualized Loss Expectancy is that it can be used directly in a cost- benefit analysis.

Question

Assume a year has passed and XYZ has improved its security. Using the following table, calculate the SLE, ARO, and ALE for each threat category listed. YXZ Software Company (Asset Value: $1,200,000 Threat Category Cost per Incident Frequency of Occurrence Cost of Controls Type of Control Programmer mistakes $5,000 1 per month $20,000 Training Loss of intellectual property $75,000 1 per 2 years $15,000 Firewall/IDS Software piracy $500 1 per month $30,000 Firewall/IDS Theft of information (hacker) $2,500 1 per 6 months $15,000 Firewall/IDS Threat of information (employees) $5,00 1 per year $15,000 Physical security Web defacement $500 1 per quarter $10,000 Firewall Theft of equipment $5,000 1 per 2 years $15,000 Physical security Viruses, worms, Trojan horses $1,500 1 per month $15,000 Antivirus Denial-of-service attack $2,500 1 per 6 months $10,000 Firewall…

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Chapter 7, Problem 4E

Program Plan Intro

Single loss expectancy:

The expected monetary loss every time a risk occurs is called the Single Loss Expectancy.

The Single Loss Expectancy (SLE), Exposure Factor (EF) and Asset Value (AV) are related by the formula:

SLE = EF * AV

Introducing this conceptual breakdown of Single Loss Expectancy into Exposure Factor and Asset Value allows us to adjust the two terms independently and is related to risk management and risk assessment.

Asset Value may vary with market changes, inflation while Exposure Factor can be reduced by enabling preventive measures.

Annualized loss expectancy:

The product of the single loss expectancy (SLE) and the annual rate of occurrence (ARO) give annualized loss expectancy (ALE).

It is mathematically expressed as:

ALE = SLE * ARO

The important feature of Annualized Loss Expectancy is that it can be used directly in a cost- benefit analysis.

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Assume a year has passed and XYZ has improved its security. Using the following table, calculate the SLE, ARO, and ALE for each threat category listed. YXZ Software Company (Asset Value: $1,200,000 Threat Category Cost per Incident Frequency of Occurrence Cost of Controls Type of Control Programmer mistakes $5,000 1 per month $20,000 Training Loss of intellectual property $75,000 1 per 2 years $15,000 Firewall/IDS Software piracy $500 1 per month $30,000 Firewall/IDS Theft of information (hacker) $2,500 1 per 6 months $15,000 Firewall/IDS Threat of information (employees) $5,00 1 per year $15,000 Physical security Web defacement $500 1 per quarter $10,000 Firewall Theft of equipment $5,000 1 per 2 years $15,000 Physical security Viruses, worms, Trojan horses $1,500 1 per month $15,000 Antivirus Denial-of-service attack $2,500 1 per 6 months $10,000 Firewall…

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