5.2.12 Risk Analysis
Lifetime: 3 Implementation Cost: $100,000. Annual Maintenance Cost: $30,000.
-
Year Benefits
Costs
Disc. Ben(0.1)
Disc. Cost(0.1)
DB-DC(0.1)
1 $10,693.
$100,000.
$9,720.
$90,909.
$-81,188.
2 $10,693.
$30,000.
$8,836.
$24,793.
$-15,956.
3 $10,693. $30,000.
$8,033.
$22,539.
$-14,505.
Sum of discounted benefits (0.05): $29,117. Sum of discounted benefits (0.1): $26,589.
Sum of discounted benefits (0.15): $24,412.
Sum of discounted costs (0.05): $148,363.
Sum of discounted costs (0.1): $138,241.
Sum of discounted costs (0.15): $129,365.
Benefit Cost Ratio (0.05): 0.20 Benefit Cost Ratio (0.1): 0.19
Benefit Cost Ratio (0.15): 0.19
Return On Investment (0.05): 0.07
Return On Investment (0.1): 0.06
Return On Investment (0.15): 0.06
Payback period (0.05): 0
Payback period (0.1): 0
Payback period (0.15): 0
5.2.13 Security Policy
Lifetime: 3 Implementation Cost: $70,000. Annual
Maintenance Cost:
$40,000.
Year Benefits Costs
Disc. Ben(0.1) Disc. Cost(0.1)
DB-DC(0.1)
$267,409. $70,000. $243,099. $63,636. $179,462.
$267,409. $40,000. $220,999. $33,057. $187,941.
$267,409. $40,000. $200,908. $30,052. $170,855.
Sum of discounted benefits (0.05): $728,219. Sum of discounted benefits (0.1): $665,006.
Sum of discounted benefits (0.15): $610,553.
Sum of discounted costs (0.05): $137,500.
Sum of discounted costs (0.1): $126,745.
Sum of discounted costs (0.15): $117,414.
Benefit Cost Ratio (0.05): 5.30
Benefit Cost Ratio (0.1): 5.25
Benefit Cost Ratio (0.15): 5.20
Return On Investment (0.05): 1.77
Return On Investment (0.1): 1.75
Return On Investment (0.15): 1.73
Payback period (0.05): 1
Payback period (0.1): 1
Payback period (0.15): 1
Here is a summary of the Return on Investment (R.O.I) for each safeguard.
-
Safeguard
ROI(10%)
Percentage of Total
Application Controls
3.37
52.6%
Security Policy
1.75
27.3%
Data Encryption
1.02
15.9%
Personnel Clearances
0.17
2.7%
Risk Analysis
0.06
1.0%
Physical Access Control
0.01
0.2%
Detection System
0.01
0.2%
Quality Assurance
0.00
0.1%
Classification Markings
0.00
0.1%
Life Cycle Management
0.00
0.0%
Personnel Control
0.00
0.0%
Passwords/Authenticaion
0.00
0.0%
Contract Specifications
|
0.00 |
0.0% |
ROI
Return On Invest ment(ROI). Calculated in order of the 10 highest ROIs.
CHAPTER 5. SAFEGUARDS
The analysis recommends a total of [[[ thirty-six (36) ]]] safeguards out of a possible 42 for use (at the AIS).
Figures 16 through 18 reflect the total cost of each safeguard for the life cycle of the safeguard.
It is generally taken that safeguards can fall into three categories:
those that prevent incidents;
those that permit the timely detection of incidents that have not been detected; (3) those that aid in the recovery process after an incident has occurred.
The goal of a safeguard is to reduce the Annual Loss Expectancy (ALE) of one or more incidents, thereby reducing the overall ALE for the enterprise. This reduction is calculated by noticing that various safeguards impact the overall system in different ways. Three different forms of impact have been noted: (1) the reduction in certain evaluative parameters for assets (for example the (recovery) safeguard of Insurance can reduce the Replacement Cost of all assets covered by the insurance);
the reduction in the level of vulnerability in certain areas (for example the (preventative) safeguard of Data Encryption) can significantly reduce the vulnerability called Disclosure (or Data Disclosure); the (detective) safeguard of Monitor System can act to lessen the difficulty that can arise from the slowly degrading Reliability of hardware components);
the reduction in the frequency of a threat (or threat event) (for example, the safeguard called Training is expected to reduce the frequency of the threat of Errors).
Not only is a safeguard intended to reduce ALE, but it must do it in a cost-effect way. RiskWatch II for Windows considers all possible safeguards and their impact on the overall system. For each, in turn, a full Cost-Benefit Analysis (CBA) is performed.
This analysis uses the reduction in ALE, expected annually, as the benefit and the initial and maintenance costs over the lifetime of the safeguard, and considers three different possible discount rates of 5, 10 and 15% to permit the calculation of the net present value of all projected figures.
In the tables below, three figures, one for each discount rate, are provided, for each safeguard,
the ratio of Total Benefits over Total Costs;
the annualized Rate of Return on Investment obtained by dividing this ratio by the number of years involved;
the Pay-back Period - the year in which accumulating benefits overtake the (initially greater) accumulating costs.
The degree to which each safeguard may already be implemented can be derived from the responses to the questions, in each area of vulnerability, that pertain to a particular safeguard.