# Product Security Governance

### Software Security Flow Down

| **Phase**                      | **Description**                                                                                                                                               | **Supporting Document(s)**                                                                                             | **Security Flow-Down Considerations**                                                                              |
| ------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------ |
| **Requirements Specification** | Defines in a complete, precise, and verifiable manner the requirements, design, behavior, or other expected characteristics of a system, service, or process. | Draft Statement of Work (SoW), Draft Requirements Description Document (RDD)                                           | Capture explicit security requirements (e.g., authentication, data protection, compliance, logging).               |
| **Analysis**                   | Examination of acquired data for its significance and probative value to the case.                                                                            | SoW, Requirements Description Document (RDD), Draft Software Requirements Specification (SRS)                          | Validate security requirements against threat models, compliance standards, and risk assessments.                  |
| **Design**                     | Process to define the architecture, system elements, interfaces, and other characteristics of a system or system element.                                     | Software Requirements Specification (SRS), Draft Software Design Document (SDD), Draft Software Development Plan (SDP) | Incorporate security architecture (secure data flows, access control, boundary protections, encryption strategy).  |
| **Implementation**             | Specific requirements or instructions for implementing software.                                                                                              | Draft Software Test Plan (STP), Software Design Document (SDD), Software Development Plan (SDP)                        | Apply secure coding standards, enforce code reviews, automate security scanning (SAST/DAST), protect dependencies. |
| **Test**                       | Determination of one or more characteristics of an object of conformity assessment, according to a procedure.                                                 | Software Test Plan (STP)                                                                                               | Perform penetration testing, vulnerability scanning, fuzz testing, and validate misuse cases.                      |

### Notes

* Each **phase builds on the previous one**: Requirements → Analysis → Design → Implementation → Testing.
* The **Software Security Strategy flows down** across all phases, ensuring traceability and consistent enforcement.
* Supporting documents should be version-controlled within the repository for auditability and compliance.

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