ISO 27001 is an international standard for information security management systems (ISMS). It provides a comprehensive framework for organizations to establish, implement, maintain, and continually improve their information security practices. The standard outlines a set of requirements that organizations must meet to protect the confidentiality, integrity, and availability of their information assets. While ISO 27001 does not specify the exact number of domains, it does provide a structured framework that covers a range of key areas relevant to information security.
ISO 27001 is organized into several sections, each addressing specific aspects of information security management. These sections are often referred to as "domains" or "clauses," and they provide a structured approach for organizations to establish and maintain effective information security controls. The standard is typically organized into the following domains:
- Context of the Organization: This domain requires organizations to define their information security context, including the scope of their ISMS, their internal and external factors, and the needs and expectations of relevant stakeholders.
- Leadership: Organizations must demonstrate leadership commitment to information security, establish an information security policy, and define roles and responsibilities for information security management.
- Planning: This domain focuses on risk assessment and treatment, where organizations identify and assess information security risks and develop a risk treatment plan to mitigate or accept these risks.
- Support: Support activities involve providing the necessary resources, competence, awareness, communication, and documented information to ensure effective information security management.
- Operation: This domain encompasses the implementation of information security controls, covering areas such as risk management, access control, cryptography, and physical security.
- Performance Evaluation: Organizations are required to monitor, measure, analyze, and evaluate the performance of their ISMS and implement necessary improvements.
- Improvement: This domain ensures that organizations continually improve their information security management system by addressing non-conformities, corrective actions, and continual improvement activities.
In summary, ISO 27001 consists of seven core domains or clauses that provide a comprehensive framework for organizations to establish and maintain effective information security management systems. These domains cover various aspects of information security, from risk assessment and treatment to leadership commitment and continual improvement, enabling organizations to protect their information assets and ensure the confidentiality, integrity, and availability of sensitive data.