Risk Management
This chapter covers the following official Security+ exam objective: 5.2 Explain elements of the risk management process. You will learn the steps of the process, from risk identification and assessment, to risk management strategies and risk reporting.
This chapter is from the book
This chapter is from the book
This chapter is from the book
Risk Identification
Risk identification is the initial step in the risk management process, aimed at identifying potential threats and vulnerabilities that could adversely affect an organization. This ensures that the organization can proactively address risks through planning and implementation of security measures.
A threat can be thought of as the potential that a vulnerability will be identified and exploited. Analyzing threats can help an organization develop security policies and prioritize securing resources. Threat assessments are performed to determine the best approaches to securing the environment against a threat or class of threats. Threats might exist, but if an environment has no vulnerabilities, it faces little or no risk. Likewise, little or no risk affects environments that have vulnerability without threat. Consider the simple analogy of a hurricane. Few would argue that a hurricane represents a threat. However, consider a home on the coast in Florida and a home inland in the Midwest. The former is certainly vulnerable to a hurricane, whereas the latter is not.
Probability is the likelihood that an event will occur. In assessing risk, it is important to estimate the probability or likelihood that a threat will occur. Assessing the likelihood of occurrence of some types of threats is easier than assessing other types. For example, you can use frequency data to estimate the probability of natural disasters. You might also be able to use the mean time to failure (MTTF) and mean time to repair (MTTR), both covered later in this chapter, to estimate the probability of component problems. Determining the probability of attacks by human threat sources is difficult. Threat source likelihood is assessed using skill level, motive, opportunity, and size. Vulnerability likelihood is assessed using ease of discovery, ease of exploit, awareness, and intrusion detection.