ISO 27001 Control 8.27: Secure System Architecture and Engineering Principles
Control 8.27 requires organizations to establish and apply documented principles for engineering secure systems across all development activities. For SMBs building or maintaining information systems, this control ensures security is embedded from design, not bolted on afterward. Without a structured approach, development teams risk introducing vulnerabilities that become expensive to remediate post-deployment.
What this means
This control mandates that your organization create formal, documented principles governing how secure systems are architected and engineered. These principles must be applied consistently whenever you develop, modify, or integrate information systems. The goal is to shift security left in the development lifecycle—making it a foundational design requirement rather than a testing afterthought. This includes establishing standards for threat modeling, secure coding, architecture reviews, and system hardening.
How to comply
- 1.Document secure system architecture principles tailored to your organization's risk profile and technology stack
- 2.Define engineering standards covering secure design patterns, threat modeling, and secure development practices
- 3.Establish a design review process that applies security principles before development begins
- 4.Create and maintain a secure development lifecycle (SDLC) policy that incorporates these principles into all phases
- 5.Train development and architecture teams on the documented principles and their application
- 6.Implement architecture governance to audit compliance with principles during development
- 7.Review and update principles annually or when technology, threats, or business requirements change significantly
Evidence auditors look for
- Secure System Architecture and Engineering Principles document with version control and approval dates
- SDLC policy explicitly referencing security principles and design requirements
- Threat modeling templates or outputs from recent development projects
- Architecture review checklists or decision logs showing principle application
- Secure coding guidelines or standards adopted by development teams
- Training records showing developers completed secure architecture education
- System design documentation for new applications referencing architectural principles
- Change control records demonstrating principle compliance for system modifications
Frequently asked questions
When will FAQs be available?
The FAQ for this control is currently being prepared.
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