A System Security Plan (SSP) is a key component of the Cybersecurity Maturity Model Certification (CMMC) framework. It is a comprehensive document that provides an overview of your organization’s cybersecurity practices and details how you implement and manage security controls to protect Controlled Unclassified Information (CUI) and other sensitive information. The SSP is an essential requirement for achieving and maintaining CMMC compliance.

Here are the key elements typically included in a System Security Plan for CMMC:

  1. System Description: A detailed description of the information system and its purpose, including the type of information processed, stored, and transmitted by the system.
  2. System Boundary: Clearly define the boundaries of the system, including the physical and logical components, connections to external systems, and any interfaces.
  3. CMMC Level and Domains: Identify the specific CMMC level that the organization is targeting and provide information on how each domain is addressed within the system.
  4. Security Controls: Document the security controls that are in place to protect the system and the information it processes. This includes controls from various sources such as NIST Special Publication 800-171, which forms the foundation for CMMC requirements.
  5. Implementation of Controls: Describe how each security control is implemented within the organization’s environment. Include information on policies, procedures, technical measures, and other safeguards.
  6. Security Policies and Procedures: Provide an overview of the security policies and procedures that govern the organization’s cybersecurity practices. This may include policies related to access control, incident response, encryption, and more.
  7. Incident Response Plan: Outline the organization’s incident response procedures, including how incidents are detected, reported, and mitigated. Highlight the steps taken to minimize the impact of security incidents.
  8. Continuous Monitoring: Detail the processes in place for continuous monitoring of the system’s security posture. This may include regular assessments, audits, and reviews to ensure ongoing compliance.
  9. Security Training and Awareness: Describe how the organization provides security training and awareness programs for personnel to ensure that they are informed about cybersecurity best practices.
  10. Access Control: Provide information on how access to the system and its resources is controlled, including user account management, authentication mechanisms, and authorization processes.
  11. Security Assessment and Authorization: Explain the processes for assessing and authorizing the security of the system. This may involve periodic security assessments, vulnerability scans, and authorization activities.
  12. Plan of Action and Milestones (POA&M): If there are any identified weaknesses or deficiencies in the security controls, document the plan for addressing them through a POA&M.

The SSP is a dynamic document that should be updated regularly to reflect changes in the organization’s IT environment, security policies, and procedures. It serves as a crucial reference for both internal stakeholders and external assessors to understand how your organization is meeting CMMC requirements and securing sensitive information.