ISO 27001 Information Security Management System

The ISO 27001 Information Security Management System (ISMS) is a comprehensive framework designed to protect information assets and provide confidence to all relevant parties—especially customers—regarding the security of their data. This standard adopts a process-based approach to establish, implement, operate, monitor, review, maintain, and continually improve an organization’s Information Security Management System. It is applicable to organizations of all sizes and sectors worldwide.

ISO/IEC 27001 is the only internationally auditable standard that defines the requirements for an effective ISMS. It is designed to ensure the selection of adequate and proportionate security controls and is particularly essential in industries where the protection of information is critical, such as finance, healthcare, public institutions, and information technologies. It assures customers that their information is handled securely and responsibly.

To obtain ISO 27001 certification, organizations must first establish and implement an Information Security Management System that fully complies with the ISO 27001 standard. This includes the development of:

• Risk assessment and risk treatment plans
• Defined roles and responsibilities
• Business continuity plans
• Incident and emergency response procedures
• Documentation and record-keeping structures

Organizations that build their systems according to ISO 27001 must then undergo an audit conducted by an internationally accredited certification body and successfully pass this assessment to receive the certification.

Although certification is not mandatory for all organizations, implementing the ISO 27001 framework is highly recommended for institutions that value information security. However, without third-party auditing and verification, the effectiveness of any system cannot be guaranteed.

Special Requirement for e-Invoice (e-Fatura) Service Providers in Türkiye

The Revenue Administration (GİB) mandates that private integrators providing e-invoice services must obtain the following certifications:

• ISO 27001 Information Security Management System
• ISO 22301 Business Continuity Management System
• ISO/IEC 20000-1 IT Service Management System

According to the official guideline published by GİB, private integrators must be certified in all three standards to offer e-invoice services legally.

In summary, Private Integrator Firms must establish and certify their systems in accordance with:

• ISO 27001 – Information Security Management System
• ISO 22301 – Business Continuity Management System
• ISO 20000-1 – IT Service Management System

ISO 27001 certification ensures that organizations are audited and verified by accredited bodies, enabling them to deliver secure and compliant services to their customers.