What Is ISO 27001? Information Security Standard Guide

What Is ISO 27001?

The ISO 27001 definition is an international standard for information security management systems, developed jointly by two organizations: the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). As a result, it’s sometimes referred to as ISO/IEC 27001.

A critical part of the ISO 27000 family of standards for information security, ISO 27001 protects the information of organizations in a systematic but cost-effective way. It does so by laying down a set of standards for defining, implementing, operating, and improving an information security management System.

Information Security Management Systems (ISMS) Explained

An Information Security Management System (ISMS) is an organization-wide framework of policies, processes, people, and controls used to protect the organization’s information. An ISMS provides a repeatable way to identify security risks, protect information, monitor performance, respond to problems, and continually improve.

The ISO 27001 ISMS standard is the internationally recognized set of requirements for establishing, implementing, maintaining, and continually improving an ISMS. It defines what an effective ISMS should include.

ISO/IEC 27001 adds the information-security layer to organizational management by requiring a structured, risk-based approach to data and information assets.

Who Needs ISO 27001?

The ISO 27001 standard is relevant to any organization that stores, processes, transmits, and relies on valuable information. As physical operations become more digitally connected, ISO 27001 certification creates strong business value by helping the organization protect sensitive information, reduce cyber risk, support vendor reviews, meet client or procurement expectations, and build trust.

ISO 27001 may be especially useful anywhere quality management, environmental responsibilities, regulated operations, and cyber risk intersect. This intersection means that many businesses must rely on a combination of three ISO standards working together:

ISO 9001 Quality Management System (QMS) Standard, which supports consistent processes, corrective actions, supplier oversight, and audit readiness.
ISO 14001 Environmental Management System (EMS) Standard, which helps organizations identify and manage environmental impacts, compliance duties, pollution prevention, and continual improvement.
ISO 27001 ISMS Standard, which helps organizations identify, assess, treat, and continually monitor risks to information, systems, and data assets.

Here are some examples of industries that benefit the most from the addition of ISO 27001 to 9001 and 14001:

Industry	Why ISO Training is Beneficial	Value of ISO 27001
Medical Device and Pharmaceutical Manufacturers	These organizations often manage strict quality control systems and regulated production requirements. They often handle sensitive health data, connected devices, research records, hazardous materials, and biological waste concerns.	Protecting product documentation, controlled records, device-related data, vendor information, and access to critical systems, all with an auditable approach to risk.
Automotive & Aerospace Supply Chains	Suppliers manage precision manufacturing, OEM requirements, proprietary designs, connected-vehicle data, aerospace specs, and environmental expectations, and strong quality processes and audit controls are essential.	Protects intellectual property, engineering files, supplier portals, product information, and customer data. Organizations may pair security training with ISO 9001 internal auditor training .
Logistics, Warehousing, and Global Transport	They depend on fleet tracking, fulfillment systems, customer and shipment databases, warehouse tech, IoT cargo sensors, and reliable delivery operations, often also tracking fuel use, emissions, and carbon performance.	Protecting and managing access to logistics platforms, shipping records, sensor data, customer information, and systems shared across locations and vendors.
Defense & Govt Contractors	They face demanding procurement terms, supply chain security expectations, CUI concerns, standardized execution requirements, and public-sector accountability.	Provides a disciplined ISMS for protecting company and contract information, managing supplier risk, and demonstrating security governance. Complements compliance efforts with federal requirements and frameworks.
Critical Infrastructure, Energy & Utilities	They juggle operational technology, industrial controls, SCADA environments , billing platforms, customer systems, and field equipment. Service continuity, safety, and environmental consequences must be balanced.	Organizing cyber-risk management around information systems and operational dependencies. CISA prioritizes industrial control system cybersecurity for power grids and water treatment.

How ISO 27001, ISO 9001, and ISO 14001 Work Together

ISO 27001, ISO 9001, and ISO 14001 address different business risks through compatible management-system approaches. Together, they empower an organization to protect critical information, deliver consistent quality, and manage environmental responsibilities in a systematic and coordinated way.

The ISO’s Harmonized Structure means the lift is lighter for every ISO standard you add. These standards are organized around similar requirements, involve similar management activities, and share terminology and structure. Organizations are able to reuse processes for defining obligations, maintaining records, managing documentation, running internal audits, tracking corrective actions, and holding management-review meetings.

Meanwhile, various teams rely on those processes to evaluate and manage a diverse array of risks. Teams take:

ISO 27001 training courses to manage information confidentiality, integrity, and availability,
ISO 9001 training courses to manage risks around errors and customer complaints, and
ISO 14001 training courses to manage risks around fuel use, waste, spill prevention, and more.

ISO 27001 Requirements

The ISO 27001 standard sets requirements such as:

Risk Assessment. Identifying information-security threats, vulnerabilities, their potential impacts, and the appropriate actions.
Leadership Support. Top management must set policy, assign accountability, provide resources, and promote security objectives.
Documentation. Maintaining required policies, procedures, risk records, objectives, and evidence of ISMS operation.
Internal Audits. Independently reviewing ISMS conformity, effectiveness, control implementation, and opportunities for improvement.
Corrective Action. Addressing nonconformities, determining root causes, implementing fixes, and preventing recurrence.
Performance evaluation. Monitoring, measuring, analyzing, and evaluating security controls, objectives, incidents, and ISMS results.
Continual Improvement. Regularly strengthening the ISMS as risks, technology, operations, and organizational needs change.

ISO 27001 Controls

ISO/IEC 27001’s Annex A provides a set of effective information-security controls. These are less a checklist for ISO 27001 compliance and more of a reference for practical measures to consider when treating risks.

Annex A controls are grouped into four areas, and the most recent 2022 version includes 93 controls, so we’ll just list a few here. Examples of ISO 27001 controls include:

Organizational Controls (A.5)
- Access Control, which limits systems, files, and applications to people who need access for their jobs. Addressed in both A.5 and A.8, the organizational piece of access control lays out rules for granting and reviewing access.
- Supplier Security, which sets security expectations for vendors that process data, provide cloud services, maintain systems, or access company facilities.
- Incident Management, which involves a clear process for reporting, investigating, containing, documenting, and learning from security events.
- Business Continuity, which involves preparing for disruptions so that critical services continue or recover within an acceptable time frame.
- Asset Management, which involves identifying and tracking important information, devices, software, records, and systems, as well as assigning owners and protecting them according to their value and sensitivity.
People Controls (A.6)
- Employee Security Awareness, which involves training, awareness, confidentiality commitments, and reporting obligations.
Physical Controls (A.7)
- Physical Security, which involves protecting offices, server rooms, equipment, storage areas, and paper records against unauthorized entry, theft, damage, or environmental threats.
Technology Controls (A.8)
- Access Control. The technical piece of access control includes measures like unique user accounts, strong authentication, privileged-access controls, and access restrictions.
- Backups, which preserve information access and support business continuity.
- Encryption, which protects data confidentiality.

ISO 27001 Certification

What is ISO 27001 certification? Due to a general convention of referring to various types of individual training as “certification,” people get confused about this one.

ISO 27001 certification means an organization’s ISMS has been independently audited against ISO 27001 requirements by an external certification body. In other words, ISO 27001 certification applies to an organization and its ISMS, not to individual employees.

The ISO 27001 certification process involves:

Defining the ISMS Scope. The organization identifies the business units, locations, systems, processes, and information assets to be included.
Building the ISMS. The organization establishes information-security policies, responsibilities, risk-assessment plans, and applicable controls.
Operating and Documenting the ISMS. Controls are put into practice and evidence is retained, such as training records, access reviews, incident records, and risk decisions.
Conducting Internal Review. Internal audits and management reviews are completed to identify gaps between the current state and the ISO 27001 standard in preparation for the external certification audit.
Choosing a Certification Body. The organization engages an independent, qualified certification body to audit their ISMS.
Completing a Stage 1 Audit. The external auditor reviews ISMS documentation, scope, readiness, and key processes.
Completing a Stage 2 Audit. The external auditor reviews evidence, interviews personnel, and samples operational practices to evaluate whether the ISMS is implemented in ISO 27001 compliance and working effectively.
Addressing Audit Findings. The organization corrects any nonconformities found by the external auditor, after which certification can be granted.
Maintaining Certification. The organization must continue operating and improving the ISMS, complete with periodic surveillance audits (often annual) and recertification cycles (often every 3 years).

Build a Stronger ISO Foundation With 9001 and 14001 Training

The ISO 27001 standard is the internationally recognized set of requirements and controls for an effective ISMS, at a time when the digitalization of physical operations has made information security management increasingly crucial.

Teams working in regulated, operationally complex industries are also likely to benefit from leveraging ISO 9001 and 14001. These standards have distinct and separate purposes from ISO 27001 but serve a complementary risk management function for quality control and environmental management.

If you need training in ISO 9001 or 14001, we can help with courses like online ISO 9001:2015 foundation training and ISO 14001:2015 introduction online training course , just a few of the options in our ISO auditing and compliance training catalog.