ISO/IEC 27001 is the world’s leading international standard for Information Security Management Systems (ISMS). It defines how organisations should establish, implement, maintain, and continually improve a structured system for protecting information.
It is published by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC) and is recognised globally across all industries.
What ISO 27001 Includes
1. The ISMS (Information Security Management System)
A structured management system that ensures information security is planned, implemented, monitored, and improved continuously.
2. Mandatory Clauses (Clauses 4–10)
These define how the ISMS must operate:
Context of the organisation
Leadership & governance
Planning (risk assessment & treatment)
Support (resources, competence, awareness)
Operation (implementing controls)
Performance evaluation
Improvement
These clauses ensure the ISMS is strategic, governed at board level, and continuously improved.
3. Annex A Controls (2022 Revision)
The 2022 update modernised the standard by consolidating controls and introducing new attributes to reflect today’s threat landscape.
Controls cover areas such as:
Access control
Cryptography
Physical security
Secure operations
Supplier management
Business continuity
Logging & monitoring
4. Risk‑Based Approach
ISO 27001 requires organisations to identify risks, evaluate them, and apply appropriate controls.
Why ISO 27001 Matters
Globally recognised proof of strong security governance
Reduces cyber risk and improves resilience
Builds trust with customers, regulators, and partners
Supports compliance with GDPR, NIS2, DORA, and other regulations
Suitable for organisations of all sizes