Is defining security roles and responsibilities a requirement of ISO 27001?

Defining security roles and responsibilities is indeed a requirement of ISO 27001. This standard emphasizes the importance of clearly outlining individual responsibilities to ensure that information security is effectively managed across the organization. This involves allocating specific tasks related to information security to designated personnel, ensuring accountability, and fostering a culture of security awareness.

This requirement is crucial as it helps organizations manage risks effectively. By having clear roles, businesses can ensure that everyone understands their part in maintaining the security of information assets, from senior management to operational staff. Additionally, documenting these roles facilitates proper training, resource allocation, and overall governance in information security.

The other options do not align with the comprehensive nature of ISO 27001. The standard applies universally to organizations of all sizes and does not limit the requirement to just IT departments or any specific employee count. This ensures that all aspects of the organization are integrated into the information security management system, fostering a consistent and robust security posture.