Isaca Certification CISM Book

post-incident review of an information security incident is a process that aims to identify the root causes, contributing factors, and lessons learned from the incident, and to implement corrective and preventive actions to avoid or mitigate similar incidents in the future. The primary objective of a post-incident review is to prevent recurrence, as it helps to improve the security posture, awareness, and resilience of the organization. Preventing recurrence also helps to reduce the impact and cost of future incidents, as well as to enhance the reputation and trust of the organization. Updating the risk profile, minimizing impact, and determining the impact are not the primary objectives of a post-incident review, although they may be part of its outcomes or outputs. References = CISM Review Manual, 16th Edition, page 1011

 According to the CISM Review Manual (Digital Version), page 5, information security culture is the set of values, attitudes, and behaviors that shape how an organization and its employees view and practice information security. Transforming the information security culture requires a change management process that involves the following steps: creating a sense of urgency, forming a powerful coalition, developing a vision and strategy, communicating the vision, empowering broad-based action, generating short-term wins, consolidating gains and producing more change, and anchoring new approaches in the culture1. Among the four options, strong management support is the best enabler for transforming the information security culture, as it can provide the necessary leadership, resources, sponsorship, and alignment for the change management process. Periodic compliance audits, robust technical security controls, and incentives for security incident reporting are important elements of information security, but they are not sufficient to change the culture without strong management support. References = 1: CISM Review Manual (Digital Version), page 5

Digital encryption is the process of transforming data into an unreadable form using a secret key or algorithm. Digital encryption will ensure the confidentiality of content when accessing an email system over the Internet, as it prevents unauthorized parties from intercepting, viewing, or modifying the email messages. Digital encryption can be applied to both the email content and the email transmission, using different methods such as symmetric encryption, asymmetric encryption, or hybrid encryption. Digital encryption can also provide other benefits such as authentication, integrity, and non-repudiation, depending on the encryption scheme and the use of digital signatures or certificates. References = CISM Review Manual 15th Edition, page 101, page 102.

According to the Certified Information Security Manager (CISM) Study Manual, a mature information security culture is one in which staff members regularly consider risk in their decisions. This means that they are aware of the risks associated with their actions and take preventative steps to reduce the likelihood of negative outcomes. Other indicators of a mature information security culture include mandatory information security training for all staff, documented and communicated information security policies, and regular interaction between the CISO and the board.

Maintaining an information security governance framework enables an organization to identify, assess, and manage its information security risks. By establishing policies, procedures, and controls that are aligned with the organization's objectives and risk tolerance, an information security governance framework helps ensure that information security risks are managed to an acceptable level.

According to the Certified Information Security Manager (CISM) Study Manual, "Information security governance provides a framework for managing and controlling information security practices and technologies at an enterprise level. Its primary objective is to manage and reduce risk through a process of identification, assessment, and management of those risks."

While the other options listed (prioritizing resources, communicating guidelines, and remaining compliant with regulations) are also important benefits of maintaining an information security governance framework, they are all secondary to the primary benefit of managing business risks to an acceptable level.