What key success factor triggers SDL activities for code/component reuse?

The key success factor that triggers secure development lifecycle (SDL) activities for code or component reuse is the SDL cycle for any architectural changes. This refers to the structured approach taken during software development that outlines how changes to the architecture should be managed, including the evaluation of existing code and components for security vulnerabilities.

When architectural changes are made, it is crucial to reassess all components used in the project to ensure their continued security and appropriateness for the new architecture. This re-evaluation helps prevent the introduction of vulnerabilities that may arise from reusing code or components that could be incompatible with new security requirements or practices. By tying security assessments to changes in architecture, teams can maintain the overall integrity and security posture of the software being developed.

The other options may relate to secure practices but do not specifically address the reuse of code or components in relation to architectural changes. For example, certifications and vulnerability disclosure processes are more focused on post-development phases rather than guiding decisions related to the reusability of components during active development.