Secure Software Delivery: Turning NIST SSDF and OWASP Guidance into Evidence

Choose practices from the system’s assets, exposure and consequences. A public content site, internal operations system and financial workflow need different depth, but each needs owned dependencies, controlled access and a response process.

Map users, services, data, administrative functions and external dependencies across trust boundaries. Ask how a legitimate capability could be misused, how one tenant or role could cross a boundary, and which failures would expose, alter or block important information.

Turn material abuse cases into requirements with a verification method and owner. A threat model that never changes acceptance or architecture is only documentation.

Authentication establishes an identity; authorization determines what that identity may do to a specific resource. Enforce authorization server-side for every sensitive action and query, including administrative and background paths.

Test horizontal and vertical privilege changes, direct object references, state transitions and revoked access. Interface hiding is not an authorization control.

Record direct and transitive dependencies, protect build credentials, review high-risk updates and retain enough provenance to identify what reached production. A software bill of materials can improve visibility, but it needs an owned vulnerability and update process.

Prioritize remediation from exploitability, exposure and consequence rather than severity labels alone. Verify the fix and consider whether the same weakness exists elsewhere.

Static analysis, dependency scanning and secret detection can find useful classes of issues. They cannot prove business authorization, workflow integrity or safe operational configuration. Combine automated checks with architecture review, code review, dynamic testing and representative misuse cases.

Independent penetration testing or certification is a separate assurance activity with its own scope, qualifications and evidence. Secure engineering should prepare for it without claiming it has already occurred.

Define how vulnerabilities are reported, triaged, contained, corrected, verified and communicated. Preserve useful logs without recording secrets or excessive personal data, and test access recovery and incident escalation.

Measure remediation age by risk, repeated defect classes, coverage of material controls and response exercises. Security work reduces uncertainty and risk; it does not make a truthful guarantee that vulnerabilities cannot exist.