Performing a post-incident review (also known as a lessons-learned session) is the best way to ensure similar incidents are identified and addressed more efficiently in the future. This review helps in understanding what went wrong, what went right, and how processes can be improved. The knowledge gained from the review can be incorporated into incident response plans and training.
"Post-incident reviews help determine root causes, assess the effectiveness of the response, and identify opportunities for improvement."
- CISM Review Manual 15th Edition, Chapter 4: Incident Management, Section: Post-incident Analysis Additionally, the ISACA CISM Practice Question Database emphasizes that post-incident reviews are essential for improving future response times and understanding patterns of threats.

The business value of an information asset is derived from its criticality, which is the degree of importance or dependency of the asset to the organization's objectives, operations, and stakeholders. The criticality of an information asset can be determined by assessing its impact on the confidentiality, integrity, and availability (CIA) of the information, as well as its sensitivity, classification, and regulatory requirements. The higher the criticality of an information asset, the higher its business value, and the more resources and controls are needed to protect it.
References = CISM Review Manual 2022, page 371; CISM Exam Content Outline, Domain 1, Task 1.32; IT Asset Valuation, Risk Assessment and Control Implementation Model1; Managing Data as an Asset3

Implementing the principle of least privilege primarily requires the identification of job duties. Job duties are the specific tasks and responsibilities that an individual performs as part of their role in the organization. By identifying the job duties, the organization can determine the minimum access privileges necessary for each individual to perform their assigned function, and nothing more. This helps to reduce the risk of unauthorized access, misuse, or compromise of information and resources. The principle of least privilege is a key security principle that states that every module (such as a user, a process, or a program) must be able to access only the information and resources that are necessary for its legitimate purpose12.
The other options are not the primary factors that require identification for implementing the principle of least privilege. Data owners are the individuals or entities that have the authority and responsibility to define the classification, usage, and protection of data. Data owners may be involved in granting or revoking access privileges to data, but they are not the ones who identify the job duties of the data users. Primary risk factors are the sources or causes of potential harm or loss to the organization. Primary risk factors may influence the level of access privileges granted to users, but they are not the ones who define the job duties of the users.
Authentication controls are the mechanisms that verify the identity of users or systems before granting access to resources. Authentication controls may enforce the principle of least privilege, but they are not the ones who determine the job duties of the users. References = Principle of least privilege What Is the Principle of Least Privilege and Why is it Important? - F5 1
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