How it differs from bolt-on security
The conventional pattern — build the software, then run a security review before launch — treats security as a gate at the end of the process. Security by design treats it as a constraint present at every decision along the way: how data flows, how access is controlled, how errors are handled. Fixing a design flaw after launch is almost always more expensive than avoiding it at the design stage.
What it looks like in practice
Concretely, it means threat modelling during architecture design, not after; secure coding practices enforced through the development pipeline itself, not a manual checklist; and testing that validates security assumptions continuously, not just once before deployment.
How RETIS applies this
SecureCode™ is RETIS's named methodology for this — a five-stage process (architecture review, threat modelling, secure build, testing and validation, deployment hardening) applied to every software engagement, whether building new software or working alongside an existing engineering team.
A practical checklist
- Is security considered during architecture decisions, or only before launch?
- Does your development pipeline include automated security checks?
- Has your application undergone threat modelling, not just a code review?
- Is there a clear owner for security decisions within your engineering team?
