ISO/IEC 27003:2017

Overview

ISO/IEC 27003:2017 - Information technology - Security techniques - Information security management systems - Guidance - is a guidance document that explains and interprets the requirements of ISO/IEC 27001:2013. It is a non‑normative companion that mirrors clauses 4–10 of ISO/IEC 27001, clarifies intent, and gives practical recommendations (uses “should”, “can”, “may”) without adding new mandatory requirements. The standard is generic and intended to be used by organizations of any type or size to design, implement and maintain an effective ISMS (Information Security Management System).

Key topics and technical requirements covered

• Context of the organization (Clause 4): identifying relevant internal and external issues, interested parties, and determining ISMS scope.
• Leadership (Clause 5): top‑management commitment, security policy, roles, responsibilities and authorities.
• Planning (Clause 6): addressing risks and opportunities, information security risk assessment and risk treatment, and setting information security objectives.
• Support (Clause 7): resources, competence, awareness, communication and documented information controls.
• Operation (Clause 8): operational planning and control, implementation of risk treatment and controls.
• Performance evaluation (Clause 9): monitoring, measurement, internal audit and management review.
• Improvement (Clause 10): nonconformity, corrective action and continual improvement.
• Relationship to other documents: references ISO/IEC 27000 (vocabulary/overview), and complements ISO/IEC 27004 (measurement) and ISO/IEC 27005 (risk management). Annex A provides a policy framework.

Practical applications - who should use it

• CISOs, information security managers and risk managers - to interpret ISO/IEC 27001 requirements when building or improving an ISMS.
• Compliance and audit teams - to prepare for audits and to map requirements to organizational processes.
• Consultants and implementers - for actionable guidance on scoping, risk assessment/treatment, documentation and continual improvement.
• Small and medium enterprises (SMEs) - to scale ISMS activities appropriately; the guidance notes which practices may be unnecessary for very small organizations.

Use cases include ISMS design, preparation for ISO/IEC 27001 certification, aligning policies and controls with business context, and improving governance, monitoring and corrective processes.

Related standards (for implementation context)

• ISO/IEC 27001:2013 - Requirements for an ISMS (primary normative reference).
• ISO/IEC 27000:2016 - Overview and vocabulary.
• ISO/IEC 27004 - Guidance on monitoring, measurement, analysis and evaluation.
• ISO/IEC 27005 - Detailed guidance on information security risk management.

Keywords: ISO/IEC 27003, ISO 27003:2017, ISMS guidance, ISO/IEC 27001 guidance, information security management systems, information security risk assessment, ISMS implementation.