Security Requirement Extraction

What Is Security Requirement Extraction?

Security Requirement Extraction is a specialized skill designed to systematically translate threat models and business context into actionable security requirements. This process bridges the gap between identifying threats or compliance obligations and specifying concrete, testable requirements that development and security teams can implement and verify. The skill supports various phases of the secure software development lifecycle, such as creating security user stories, defining security acceptance criteria, and mapping compliance needs to software specifications.

The security-requirement-extraction skill, as implemented for the Happycapy Skills platform, automates and streamlines this translation. It accepts threat analyses, business objectives, or compliance statements as inputs and outputs structured security requirements that can be directly used in requirements management, architecture documentation, or security testing.

Why Use Security Requirement Extraction?

Modern software projects face increasing security expectations from users, regulators, and business stakeholders. Threat modeling and compliance assessments are valuable, but they only improve security if their findings are converted into clearly defined, actionable requirements. Without this translation, teams risk misunderstandings, incomplete coverage, or non-compliance.

Using a skill like Security Requirement Extraction provides several benefits:

• Consistency: Ensures that security requirements are derived systematically, reducing the risk of ad-hoc or missed requirements.
• Traceability: Links business needs, threats, and compliance statements to concrete technical controls, which is critical for audits and verification.
• Actionability: Produces requirements that are specific, testable, and ready for inclusion in user stories, acceptance criteria, or test cases.
• Efficiency: Automates a traditionally manual and error-prone step in the requirements engineering process, saving time and improving coverage.
• Clarity: Distinguishes between different requirement types (functional, non-functional, constraints) and their attributes, enabling better communication among stakeholders.

How to Use Security Requirement Extraction

The security-requirement-extraction skill is typically integrated into a development or security workflow where threat analysis, business priorities, or compliance obligations are already being captured. Here’s a typical usage pattern:

1. Input Preparation
   Gather relevant inputs, such as:

   • Threat models (e.g., STRIDE analysis)
   • Business requirements (e.g., “Protect customer data”)
   • Compliance statements (e.g., GDPR, PCI DSS clauses)

2. Skill Invocation
   Use the skill to process these inputs and extract security requirements. This may be done via API, CLI, or as a plugin in your development workflow.

   Example Input:

   json

   {
     "threat": "Unauthorized access to customer PII",
     "businessGoal": "Maintain customer trust and data privacy",
     "compliance": "GDPR Article 32 - Security of processing"
   }

3. Output Interpretation
   The skill outputs structured security requirements, categorized by type and annotated with relevant attributes.

   Example Output:

   json

   [
     {
       "type": "Functional",
       "requirement": "System must authenticate all users before allowing access to PII."
     },
     {
       "type": "Non-functional",
       "requirement": "Authentication process must complete within 2 seconds."
     },
     {
       "type": "Constraint",
       "requirement": "Must use AES-256 encryption with managed key rotation for all stored PII."
     }
   ]

4. Integration
   Incorporate the extracted requirements into:

   • Security user stories (for agile development)
   • Security test cases (for QA and verification)
   • Security acceptance criteria (for release management)
   • Architecture documentation (for traceability)

5. Review and Refinement
   Review requirements with stakeholders, refine as needed, and ensure traceability back to original threats or compliance needs.

When to Use Security Requirement Extraction

This skill is applicable at several critical stages:

• Threat Modeling: When converting identified threats into actionable controls or requirements.
• Requirements Engineering: During the creation or refinement of security requirements from high-level business goals.
• User Story Development: While writing or updating security-focused user stories for agile teams.
• Test Case Generation: To define concrete security test cases that map to compliance or threat-driven requirements.
• Security Acceptance Criteria: While establishing clear, testable criteria for accepting features or releases from a security perspective.
• Compliance Audits: When mapping regulatory or standards-based requirements to technical controls and vice versa.
• Documentation: For creating or updating security architecture and requirements documentation.

Important Notes

• Requirement Categories and Flow: The skill follows a logical flow from business needs to actionable controls.

  plaintext

  Business Requirements → Security Requirements → Technical Controls

  For example:

  • Business: “Protect customer data”
  • Security Requirement: “Encrypt PII at rest”
  • Technical Control: “AES-256 encryption with KMS key rotation”

• Requirement Types: The skill distinguishes between:

  • Functional Requirements: What the system must do (e.g., “System must log all access attempts”)
  • Non-functional Requirements: How the system must perform (e.g., “Logs must be stored for 1 year”)
  • Constraints: Limitations or mandates (e.g., “Must use FIPS 140-2 validated modules”)

• Requirement Attributes: Each requirement should have attributes such as priority, source (threat, compliance, business), and testability.

• Clarity and Specificity: Requirements should be clear, unambiguous, and testable. Avoid vague language such as “secure the system.”

• Traceability: Always maintain traceability from each security requirement back to its source (threat, business goal, or compliance clause).

• Tool Integration: This skill is designed to fit into automated or semi-automated development workflows, but always validate outputs with human review for critical applications.

Security Requirement Extraction is a foundational practice for secure software engineering, ensuring that security isn’t just an afterthought but a systematically engineered property of your systems. Use this skill to make your security requirements clear, actionable, and auditable.