Editor’s note: This article was updated in June 2026 to reflect the growing adoption of Secure by Design across defence and government programmes.
Secure by Design has become an increasingly important concept across defence and government. Yet despite growing awareness, many organisations are still unclear on what the principles mean in practice.
At its core, Secure by Design is about moving cyber security from the edge of a project to its centre. Rather than treating security as a separate activity or a final hurdle before deployment, the approach encourages organisations to consider cyber risk throughout the entire system lifecycle.
The principles themselves provide the foundation for this way of thinking. While straightforward on paper, each represents a significant shift in how organisations approach security, delivery and assurance.
1. A Whole-Team Approach
Historically, cyber security has often been viewed as the responsibility of specialist teams. Security professionals identified risks, conducted assessments and provided advice, while delivery teams focused on building and operating systems.
Secure by Design takes a different view.
Cyber security is treated as a shared responsibility across the organisation. Senior leaders, programme managers, engineers, commercial teams, suppliers and security specialists all have a role to play in managing cyber risk.
This matters because many security decisions are not purely technical. Procurement choices, project timelines, supplier selection, operational processes and budget decisions can all influence security outcomes. A whole-team approach helps ensure these decisions are made with an understanding of the risks involved.
In practice, organisations that adopt this principle tend to involve security considerations earlier in planning and decision-making rather than introducing them late in delivery.
2. Continual Risk Management
Traditional approaches to security often focus on assessments at specific points in time. A system is reviewed, risks are identified and actions are taken to achieve an acceptable level of assurance.
The challenge is that systems rarely stand still.
Requirements change. New suppliers are introduced. Software is updated. Threats evolve. Risks that were considered acceptable during development may look very different six months later.
Continual risk management recognises this reality.
Rather than treating cyber risk as something that can be assessed once and forgotten, organisations are encouraged to identify, review and manage risks throughout the system lifecycle. This creates a clearer understanding of how risk changes over time and supports more informed decision-making.
The goal is not to eliminate every risk. It is to ensure risks are understood, visible and managed appropriately.
3. Secure Systems Engineering
One of the most important ideas behind Secure by Design is that cyber security should be treated as an engineering challenge.
Just as organisations consider safety, performance, reliability and usability when designing systems, security should be built into the engineering process from the outset.
This means considering security requirements during design activities, understanding how components interact, identifying potential weaknesses early and making informed design decisions to reduce exposure to risk.
The benefit of this approach is that security controls become part of the system itself rather than additional measures applied later.
Addressing security during design is almost always simpler, more effective and less costly than attempting to retrofit controls after deployment.
4. Evidence-Based Assurance
Perhaps the most significant shift introduced by Secure by Design is the emphasis on evidence-based assurance.
Traditionally, organisations have often focused on achieving accreditation or passing an assessment. While these activities remain important, they provide assurance at a particular moment in time.
Secure by Design encourages organisations to build assurance through evidence generated throughout the lifecycle of a project.
This evidence may include design decisions, risk assessments, testing outcomes, security reviews, operational monitoring and other activities that demonstrate how security objectives are being achieved.
Rather than relying solely on a certificate or accreditation outcome, organisations develop a body of evidence that supports confidence in the security of the system.
The focus moves from proving compliance once to demonstrating security continuously.
5. Integrated Security
The final principle recognises that security cannot operate effectively in isolation.
Too often, security processes become detached from delivery, creating friction between project teams and security specialists. This can lead to delays, duplicated effort and security requirements emerging at the worst possible moment.
Integrated security seeks to avoid this by embedding security considerations into existing delivery, engineering and governance processes.
Security becomes part of project planning, architecture reviews, change management, testing and operational activities. It is considered alongside other business and technical requirements rather than as a separate workstream.
When implemented effectively, integrated security helps organisations improve both security outcomes and delivery efficiency.
Why These Principles Matter
Individually, each principle provides a useful framework for improving security. Together, they represent a broader shift in thinking.
Secure by Design encourages organisations to move beyond viewing cyber security as a compliance exercise and instead treat it as an ongoing aspect of system delivery and operation. The emphasis is on understanding risk, making informed decisions and generating evidence that demonstrates those decisions remain appropriate over time.
For organisations operating in defence, government and other regulated environments, this approach is becoming increasingly important as systems grow more complex, supply chains become more interconnected and cyber threats continue to evolve.
The principles themselves are not complicated. The challenge lies in embedding them into everyday decision-making, delivery processes and organisational culture.
Those that do are often better positioned to develop systems that are not only compliant, but resilient, trustworthy and secure by design.
Ready To Start Your Secure By Design Journey?
As a leading cyber security consultancy that helped to develop Secure by Design, Logiq can assist you on your journey to continual risk management and allow you to implement security from top to bottom. To speak to a member of the team, contact us via email contact@logiq.co.uk or call 0117 457 7463.
