Secure SDLC Policies & Training

Development processes often prioritise functionality, schedule and quality while security controls are added close to release. This can leave design decisions, third-party components, update mechanisms and vulnerability-handling responsibilities insufficiently addressed.

A Secure SDLC makes security part of normal product governance. NIST’s Secure Software Development Framework provides high-level practices that can be integrated into existing development models, while OWASP SAMM provides a structured way to assess and improve software security maturity. For organisations placing products with digital elements on the EU market, the Cyber Resilience Act also establishes cybersecurity requirements across design, development, production and vulnerability handling.

The practical goal is simple: define what must happen, when it must happen, who owns it and what evidence should be retained.

 

1. Define Scope and Ownership

Identify the products, repositories, services, development teams and suppliers in scope. Document who is responsible for security decisions, testing, release approval, vulnerability handling and post-release updates.

Avoid assigning “security” to one team without defining how engineering, product, quality and compliance contribute. A clear responsibility model reduces gaps between functions.

2. Add Security Requirements During Planning

Consider security requirements alongside functional, quality and regulatory requirements. Define expectations for authentication, authorisation, data protection, logging, secure configuration, update mechanisms, dependency management and vulnerability response where relevant.

Requirements should be specific enough to test and traceable to product risks, customer needs, contracts or applicable regulatory obligations.

3. Review Architecture Early

Use architecture reviews and threat modelling to identify assets, trust boundaries, interfaces, data flows, privileged functions, remote access paths and realistic misuse scenarios. Record important design decisions and required controls before implementation.

For higher-risk systems, document security assumptions and review them when the architecture changes.

4. Make Secure Development Repeatable

Turn security expectations into normal engineering tasks. Depending on the environment, this may include secure coding rules, peer review, secrets management, branch protection, dependency controls, build protections and defined handling for third-party software.

Teams should know which controls are mandatory, which checks are automated and which situations require specialist review.

5. Build Security Verification Into Testing

Plan security testing rather than adding it at the end of a release. Use methods appropriate to the product and risk, such as requirements verification, static analysis, software composition analysis, configuration review, API testing, web or mobile security testing, firmware review and penetration testing.

Define release criteria so high-risk findings have clear remediation, approval or documented risk-treatment rules.

6. Control Release and Deployment

A secure release process should confirm that approved software is delivered through an authorised build and deployment path. Maintain version information, relevant test evidence, risk decisions and recovery considerations.

For connected products, review update mechanisms, signing, integrity verification, secure defaults and the ability to provide security fixes after release.

7. Manage Vulnerabilities After Launch

Establish a process for receiving, triaging, investigating, prioritising and remediating vulnerabilities. Define who communicates with customers, suppliers and external reporters and how updates are tracked.

Where third-party and open-source components are used, maintain enough component visibility to assess whether disclosed vulnerabilities affect released products.

8. Train People According to Their Role

Generic awareness training is not a substitute for role-based Secure SDLC enablement. Product managers need to understand security requirements and acceptance decisions. Architects need threat-modelling skills. Developers need secure implementation practices. Testers need security verification methods. Management needs visibility into risk, exceptions and priorities.

Use the organisation’s own processes, product types and examples wherever practical so teams can apply the learning directly.

A mature programme does not need unnecessary complexity. It needs usable controls that are followed consistently and can be evidenced.

Strong governance typically includes a documented Secure SDLC policy, clear lifecycle checkpoints, named owners, practical security requirements, testing expectations, exception handling, vulnerability-management procedures, improvement actions and periodic review.

Useful measures may include completion of required security reviews, unresolved high-risk findings, remediation ageing, dependency-risk status, training completion and progress against the roadmap.

ComplyMarket can help organisations move from fragmented security activities to a structured Secure SDLC programme. Support can start with a review of existing development, release, testing and update processes, followed by prioritised gaps and a practical implementation roadmap.

Based on the agreed scope, ComplyMarket can support security policies, procedures, checklists, responsibility models, security requirements and tailored workshops. This work can connect with related services already described in ComplyMarket’s public cybersecurity portfolio, including product cybersecurity assessment, secure development lifecycle review, web and API testing, mobile and firmware testing, SBOM and software composition analysis, vulnerability-handling assessment and remediation retesting.

For organisations preparing products with digital elements for the EU market, the programme can also be coordinated with CRA readiness work so product-development controls, cybersecurity evidence and vulnerability-handling processes are managed as connected workstreams. ComplyMarket’s existing CRA services already address secure development, cybersecurity evidence, vulnerability handling and practical implementation roadmaps.

The result is a practical security framework built around how teams develop and maintain products: clear enough to operate, structured enough to review and flexible enough to improve over time.