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- March
Today, data is an organization's most valuable asset — whether it's financial records, personnel data, or customer information. If this data is leaked or compromised, the damage extends far beyond finances to organizational credibility. ISO 27001 is the international standard that helps organizations build a systematic information security framework recognized worldwide.
What Is ISO 27001?
ISO/IEC 27001 is the international standard for Information Security Management Systems (ISMS), developed jointly by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). It provides a framework for planning, implementing, monitoring, and continuously improving an organization's information security.
In brief: ISO 27001 is a "blueprint" for building an organization-wide information security system, covering People, Processes, and Technology. It goes beyond simply installing firewalls or two-factor authentication — it requires comprehensive, end-to-end security management.
ISO 27001 Timeline — From Past to Present
ISO 27001 has evolved through several versions, each updated to address emerging threats:
| Version | Year Published | Key Changes |
|---|---|---|
| ISO 27001:2005 | 2005 | First version — evolved from BS 7799-2 (UK). Established the ISMS framework internationally with 133 controls in 11 domains |
| ISO 27001:2013 | 2013 | Restructured to align with Annex SL (harmonized structure for all ISO standards). Reduced controls to 114 in 14 domains. Emphasized risk-based thinking |
| ISO 27001:2022 | 2022 | Latest version — reorganized Annex A to 93 controls in 4 themes. Added 11 new controls including Cloud Security, Threat Intelligence, and Data Masking |
ISO 27001 Structure — 10 Main Clauses
ISO 27001:2022 consists of 10 clauses. Clauses 1-3 are introductory, while Clauses 4-10 contain the mandatory requirements for certification:
| Clause | Title | Key Content |
|---|---|---|
| 4 | Context of the Organization | Analyze organizational context, identify stakeholders, and define the ISMS scope |
| 5 | Leadership | Top management must demonstrate commitment, establish ISMS policy, and assign roles and responsibilities |
| 6 | Planning | Conduct risk assessment, develop risk treatment plans, and define security objectives |
| 7 | Support | Allocate resources, train personnel, establish internal communication, and manage documentation |
| 8 | Operation | Implement plans, conduct periodic risk assessments, and execute the risk treatment plan |
| 9 | Performance Evaluation | Monitor results, conduct internal audits, and perform management reviews |
| 10 | Improvement | Address nonconformities and drive continual improvement of the ISMS |
Annex A — 93 Controls in 4 Themes
Annex A contains the controls that organizations must consider selecting based on their risk assessment results. ISO 27001:2022 reorganized them into 4 themes:
| Theme | Number of Controls | Example Topics |
|---|---|---|
| Organizational Controls | 37 | Security policies, supplier management, threat intelligence, access control policies |
| People Controls | 8 | Personnel screening, security awareness training, confidentiality agreements, remote working |
| Physical Controls | 14 | Physical security perimeters, equipment protection, secure media disposal |
| Technological Controls | 34 | Authentication, encryption (SSL/TLS), logging, malware protection, data masking |
Key point: Organizations do not need to implement every control. They must create a Statement of Applicability (SoA) that specifies which controls are applicable or not, along with justifications. This is a critical document during certification audits.
ISO 27001 vs Thailand's ICTSC 1-2557
Thai government agencies may be more familiar with ICTSC 1-2557 (Thailand's Government Information Security Standard). Here is how the two standards relate:
| Aspect | ISO 27001 | ICTSC 1-2557 |
|---|---|---|
| Developer | ISO/IEC (International Standards Organization) | Ministry of Digital Economy and Society (Thailand) |
| Scope | International — applicable to all countries and organization types | Thai public sector — government agencies and state enterprises only |
| Foundation | ISMS framework + risk-based approach | Based on ISO 27001:2013 |
| Certification | Formal certification by international Certification Bodies (CBs) | Assessment against defined criteria (no formal CB certification) |
| Number of Controls | 93 (2022 version) | References 114 (from ISO 27001:2013) |
| Thai Context | Not specific to Thailand | Tailored specifically for Thai government agencies |
| Relationship | The two standards complement each other — agencies already compliant with ICTSC can pursue ISO 27001 certification more easily, as they share the same foundation | |
Why ISO 27001 Matters for Organizations Using ERP
An ERP system is the data hub of the entire organization — from financial data, accounting, inventory, and HR to approval workflows. All of this data is a target for malicious actors:
- Highly sensitive data — Salary records, vendor information, and contract details could cause massive damage if leaked
- Large number of users — ERP systems serve hundreds of users across multiple departments, requiring strict access control
- External system integrations — APIs connecting to banks, GFMIS, and tax systems expand the attack surface
- Legal compliance — Thailand's PDPA (Personal Data Protection Act) and Cybersecurity Act mandate appropriate security measures
- Business continuity — If the ERP goes down, the entire organization stops. A Disaster Recovery plan is essential
How Saeree ERP Aligns with ISO 27001
Saeree ERP is designed with security in mind from the ground up (Security by Design). The table below maps ISO 27001 controls to Saeree ERP features:
| ISO 27001 Control | Saeree ERP Feature | Details |
|---|---|---|
| Access Control | RBAC (Role-Based Access Control) | Role-based permissions granular to menu, button, and report level |
| Authentication | Two-Factor Authentication | Supports 2FA via OTP to prevent unauthorized access |
| Cryptography | SSL/TLS Grade A+ | All communications encrypted with HTTPS rated A+ by SSL Labs |
| Operations Security | Full Audit Log | Every transaction is logged — who, what, when, and from which IP |
| System Acquisition | Secure Development Lifecycle | Developed following OWASP Top 10, with SQL Injection and XSS protection built into the codebase |
| Business Continuity | Disaster Recovery Plan | Automated backups with clearly defined RPO/RTO recovery plans |
| Identity Management | ThaiD Support | Supports Thailand's national digital ID (ThaiD) for government agencies |
7 Steps to Prepare for ISO 27001 Certification
For organizations interested in ISO 27001 certification, here are the key steps:
- Define the scope — Specify which systems, processes, and departments the ISMS will cover (e.g., ERP system, data center, office premises)
- Conduct risk assessment — Identify information assets, threats, vulnerabilities, and risk levels, then prioritize them
- Develop a risk treatment plan — Select controls from Annex A to address each risk and create the Statement of Applicability (SoA)
- Create policies and documentation — Write the Information Security Policy, procedures, and guidelines required by the standard
- Train and build awareness — Conduct security training for all staff levels, from executives to ERP end users, ensuring everyone understands their security role
- Implement and conduct internal audits — Execute the plan, perform internal audits to identify gaps, and take corrective actions
- External certification audit — Engage an accredited Certification Body (e.g., BSI, TUV, Bureau Veritas) to conduct Stage 1 (documentation review) and Stage 2 (on-site implementation audit)
Estimated timeline: Mid-sized organizations (100-500 employees) typically need 6-12 months to prepare, depending on their existing security posture. Agencies already compliant with Thailand's ICTSC standard can achieve certification faster, as the two share a common foundation.
Summary — Who Is ISO 27001 Right For?
| Organization Type | Level of Necessity | Reason |
|---|---|---|
| Organizations handling sensitive data (finance, health) | Highly recommended | High-risk data requires a rigorous management framework |
| Organizations subject to legal compliance (PDPA, Cybersecurity Act) | Highly recommended | ISO 27001 helps achieve comprehensive legal compliance |
| Organizations using ERP as their core system | Highly recommended | ERP holds all organizational data — systematic protection is essential |
| Organizations with international trade partners | Recommended | ISO 27001 is recognized by international business partners |
| Small businesses without sensitive data | Not required (but beneficial) | Start with basic security practices and scale up over time |
| Early-stage startups (no enterprise clients) | Not required | Certification costs may not be justified at this stage |
ISO 27001 is not just a certificate to hang on the wall — it's a process that helps organizations see information risks systematically. When ERP is the organizational backbone, a solid ISMS ensures every piece of data is protected, from encryption and access control to disaster recovery planning.
— Paitoon Butri, Network & Server Security Specialist, Grand Linux Solution
If your organization is planning ISO 27001 certification and needs an ERP system that aligns with international security standards, schedule a demo or contact the Saeree ERP consulting team for a free consultation.
