What is a key aspect of improving information security according to ISO 27001 principles?

The key aspect of improving information security according to ISO 27001 principles focuses on investment in suitable controls. This is because ISO 27001 emphasizes a risk-based approach to managing information security. Implementing suitable controls helps organizations manage identified risks effectively and ensures that information security is aligned with the specific threats and vulnerabilities that the organization faces.

By investing in appropriate controls, organizations can establish a security framework that mitigates risks and protects sensitive information. These controls can include technical measures, such as firewalls and encryption, as well as procedural and organizational controls, like access controls and incident response plans.

While other options like employee feedback, annual policy reviews, and continuous monitoring have their importance in the realm of information security, they do not directly address the foundational aspects of establishing a secure environment as effectively as the investment in suitable controls. Controls provide the necessary structure and safeguards that must be continuously evaluated and improved, making them a primary focus for enhancing information security in alignment with ISO 27001 standards.