ISO 27004 provides guidance on which aspect of information security?

ISO 27004 specifically focuses on the evaluation of information security management systems (ISMS) through the use of metrics and measurement. It provides a framework for organizations to understand how to assess the effectiveness of their information security controls and policies, ultimately supporting continuous improvement.

By establishing a set of metrics, ISO 27004 enables organizations to quantify the performance of their ISMS and helps in making informed decisions based on empirical data. This is essential for demonstrating compliance with information security standards, managing risks, and ensuring that security objectives are being met.

Understanding the effectiveness of security measures through metrics not only aids in compliance but also enhances overall information security management, making it easier to identify areas for improvement and resource allocation. Thus, the guidance provided in ISO 27004 is crucial for organizations looking to assess and enhance their security posture effectively.