ISO 27001 vs. ISO 27002: Which Standard Do You Need?

For organizations navigating the landscape of information security, two standards often come up: ISO 27001 and ISO 27002. While they are closely related, they serve distinct purposes. Mistaking one for the other can lead to confusion and missteps in your compliance journey. Understanding their specific roles is the first step toward building a successful and certifiable security program.

Think of it this way: one standard provides the "what" you need to achieve, while the other provides the "how." Let's break down their functions so you can confidently apply them to your organization's security goals.

The Strategic Framework: What is ISO 27001?

ISO 27001 is a formal specification standard. Its primary purpose is to provide the requirements for establishing, implementing, maintaining, and continually improving an Information Security Management System (ISMS). An ISMS is a systematic approach to managing an organization's sensitive information so that it remains secure.

Crucially, ISO 27001 is the standard against which an organization can be audited and formally certified. Achieving ISO 27001 certification demonstrates to customers, partners, and stakeholders that your organization has a robust and compliant security posture in place. The standard is focuses on the high-level management system and processes.

The Implementation Guide: What is ISO 27002?

ISO 27002, in contrast, is a supplementary standard that serves as a code of practice. It provides a detailed set of guidelines and best practices for selecting, implementing, and managing information security controls. You cannot get "certified" in ISO 27002; it is a reference document, not a specification to be audited against.

This standard offers in-depth advice on the specific security controls an organization might implement. It elaborates on the controls listed in Annex A of ISO 27001, providing the granular detail needed for effective implementation. Elements covered include access controls, risk assessment procedures, security policies, and the segregation of duties.

A Symbiotic Relationship: How the Standards Work Together

The true power of these standards is realized when they are used together. ISO 27001 mandates that an organization conduct a risk assessment to identify threats and vulnerabilities. Based on this assessment, the organization must select and implement controls to mitigate those risks.

This is where ISO 27002 becomes invaluable. While ISO 27001's Annex A provides a list of potential security controls, ISO 27002 offers comprehensive guidance on how to actually apply them. If ISO 27001 requires you to have access controls, ISO 27002 gives you the best-practice recommendations for designing and deploying those controls effectively.

By using both standards, organizations can design a comprehensive security management system that not only meets the requirements for ISO 27001 certification but is also built on a foundation of internationally recognized best practices.

Your Path to ISO Certification

Understanding these standards is the first step toward enhancing your organization's security. Readynez offers an extensive portfolio of ISO Courses and Certifications, providing you with the expert instruction and support you need to prepare for exams and achieve certification.

All our other ISO courses are also included in our unique Unlimited Security Training offer, where you can attend the ISO courses and over 60 other security courses for just €249 per month. This is the most flexible and affordable way to earn your security certifications and advance your career.

If you have any questions or would like to discuss your opportunities with ISO certifications and how to best achieve them, please reach out to us.

Frequently Asked Questions about ISO 27001 and 27002

Is ISO 27001 or ISO 27002 the standard for certification?

ISO 27001 is the certification standard. Organizations undergo an audit against the requirements of ISO 27001 to prove they have a functioning Information Security Management System (ISMS). ISO 27002 is a guidance document and is not for certification.

Do I need to use ISO 27002 to get certified for ISO 27001?

While not strictly mandatory, using ISO 27002 is considered a best practice and is highly recommended. It provides the detailed implementation guidance for the security controls referenced in ISO 27001's Annex A, making it an essential tool for successful implementation and compliance.

Can my organization get "ISO 27002 certified"?

No. ISO 27002 is a code of practice offering recommendations and guidelines. There is no certification process for ISO 27002 itself. Certification applies only to management system standards like ISO 27001.

How does Annex A of ISO 27001 relate to ISO 27002?

Annex A of ISO 27001 provides a list of control objectives and controls that an organization can select from as part of its risk treatment process. ISO 27002 provides the detailed implementation guidance for each of those controls, explaining their purpose and how to apply them.