[Day 4] 7. Systems Security Engineering Capability Maturity Model (SSE-CMM)

A framework designed to evaluate and improve the security engineering processes within an organisation.
Focuses on integrating security practices into system development and operational processes.
It provides a maturity model for assessing and improving an organisation's security capabilities.

To assess and improve the effectiveness of security processes in system engineering.
Helps organizations achieve predictable and repeatable security outcomes.

Process Areas (PAs):
- SSE-CMM defines 22 process areas that cover security engineering and project management.
- Examples of process areas:
  - Risk Management
  - Threat Assessment
  - Configuration Management
  - Security Testing and Evaluation
Capability Levels:
- A five-level maturity scale evaluates how well an organisation performs its security processes:
  - Level 1: Performed – Basic security processes exist but are unstructured.
  - Level 2: Planned and Tracked – Processes are documented and tracked.
  - Level 3: Well-Defined – Processes are standardised and integrated.
  - Level 4: Quantitatively Controlled – Metrics are used to measure process performance.
  - Level 5: Continuously Improving – Processes are optimised and continuously improved.
Security Practices:
- Focuses on embedding security throughout the system lifecycle, from requirements analysis to deployment and operation.

Improves Security Maturity: Ensures organisations follow structured and repeatable security practices.
Enhances Compliance: Aligns security processes with regulatory requirements and industry standards.
Reduces Risk: Identifies and mitigates vulnerabilities in systems and processes.

Risk Assessment and Management: Helps prioritise and mitigate security risks.
System Development: Ensures security is integrated into the design and development phases.
Audits and Reviews: Provides a benchmark for assessing the maturity of security practices.