ISO 27001 identity and access management requirements

Understanding ISO 27001 Identity and Access Management Requirements

ISO 27001 is a globally recognized standard for information security management systems (ISMS). It provides a framework for organizations to manage and protect their information assets. One of the key areas covered in ISO 27001 is identity and access management (IAM), which ensures that only authorized individuals can access specific resources.

Annex A.9: Access Control Requirements

Annex A.9 of ISO 27001 outlines the access control requirements that organizations must implement to comply with the standard. These requirements are not just theoretical—they are practical and must be documented to demonstrate compliance during audits.

• Access control policies must be defined and implemented.
• Authentication mechanisms must be appropriate to the risk level of the resource.
• Authorization must be based on the principle of least privilege.
• Access logs must be maintained and reviewed regularly.

Mapping ISO 27001 Requirements to Practical Authentication Controls

One of the most common challenges organizations face when implementing ISO 27001 is mapping the standard's requirements to practical authentication controls. For example, the standard requires the use of multi-factor authentication (MFA) for access to sensitive systems, but many organizations may not have the infrastructure in place to support this.

Bastionary, a self-hosted platform for authentication, billing, licensing, and feature flags, can help organizations implement these requirements in a scalable and secure manner. By using Bastionary, organizations can ensure that their authentication controls are both compliant with ISO 27001 and aligned with their business needs.

Implementing Access Control with Bastionary

When implementing access control with Bastionary, it's important to understand how the platform supports the requirements of ISO 27001. For example, Bastionary allows organizations to define and enforce access policies based on user roles, which aligns with the principle of least privilege.

      # Example Bastionary policy for role-based access
      {
        "name": "admin-access",
        "type": "policy",
        "description": "Allows access to sensitive systems for administrators",
        "rules": [
          {
            "action": "allow",
            "resource": "sensitive-system",
            "user": "admin"
          }
        ]
      }
      

This policy ensures that only administrators have access to sensitive systems, which is a key requirement of ISO 27001.

Documenting Compliance with ISO 27001

Compliance with ISO 27001 is not just about implementing the right controls—it's also about documenting the process. Auditors expect clear evidence of how requirements are implemented in practice.

For example, when implementing access control with Bastionary, it's important to document the following:

• How access policies are defined and enforced.
• What authentication mechanisms are used and why.
• How access logs are maintained and reviewed.