Changes in ISO 27001 Organization Control A.5.3 - Segregation of Duties from 2013 to 2022

Created in July 23, 2024

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Changes in ISO 27001 Organization Control A.5.3 - Segregation of Duties from 2013 to 2022 with [Kimova.AI](https://kimova.ai)

Welcome back to Kimova.AI’s ISO 27001 auditing series. In our previous article, we explored the changes in Control A.5.2: Information Security Roles and Responsibilities. Today, we will delve into Control A.5.3: Segregation of Duties, comparing the 2013 version with the 2022 version, and highlighting the similarities and differences.

Control A.5.3: Segregation of Duties

Control A.5.3 focuses on segregating duties within the organization to reduce the risk of information security incidents and fraud. This control aims to ensure that no single individual has control over all aspects of a critical process.

Key Changes in A.5.3

  1. Segregation of Duties Definition
    • 2013 Version: The 2013 version required organizations to implement segregation of duties, but it was often implied within other controls rather than being explicitly detailed as a standalone control.
    • 2022 Version: The 2022 update provides a more explicit and detailed requirement for segregation of duties. It specifies that critical duties and responsibilities should be divided among different individuals to reduce the risk of error, fraud, and misuse of the organization’s assets.
  2. Implementation of Segregation
    • 2013 Version: The previous version suggested segregation of duties as part of good practice in various controls but did not provide comprehensive guidelines.
    • 2022 Version: The updated version offers clearer guidelines on implementing segregation of duties. It emphasizes the importance of formally defining and documenting the segregation to ensure that it is consistently applied across the organization.
  3. Role of Technology in Segregation
    • 2013 Version: The role of technology in enforcing segregation of duties was less emphasized.
    • 2022 Version: The 2022 update acknowledges the role of technology in enforcing segregation of duties. It suggests using automated systems and tools to help manage and monitor the segregation of critical tasks, thereby reducing the reliance on manual processes.
  4. Review and Monitoring
    • 2013 Version: Regular review and monitoring of segregation of duties were implied but not explicitly required.
    • 2022 Version: The 2022 version explicitly requires organizations to regularly review and monitor the segregation of duties. This includes periodic audits and checks to ensure that the segregation is effective and that no single individual has unauthorized control over critical processes.

Implications of These Changes

  1. Clearer Guidelines
    • The detailed requirements and guidelines in the 2022 version provide organizations with a clearer understanding of how to implement effective segregation of duties. This reduces ambiguity and helps ensure that segregation is consistently applied.
  2. Formal Documentation
    • The emphasis on formally defining and documenting the segregation of duties ensures that all relevant personnel are aware of their specific responsibilities. This enhances accountability and reduces the risk of unauthorized actions.
  3. Enhanced Use of Technology
    • By recognizing the role of technology in managing segregation of duties, the 2022 version encourages organizations to leverage automated tools and systems. This improves the efficiency and effectiveness of segregation controls.
  4. Regular Monitoring and Review
    • The requirement for regular monitoring and review ensures that segregation of duties remains effective over time. This helps organizations promptly identify and address any lapses or weaknesses in the segregation controls.

Conclusion

The updates to Control A.5.3 in ISO 27001:2022 reflect a more structured and explicit approach to managing segregation of duties. By providing clearer guidelines, emphasizing formal documentation, leveraging technology, and requiring regular monitoring, the standard helps organizations reduce the risk of information security incidents and fraud.

In our next article, we will explore Control A.5.4: Contact with Special Interest Groups. Stay tuned for more insights and practical tips from Kimova.AI as we continue to unravel the updates in ISO 27001:2022.

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