| Function and Category |
| Identity (ID) Asset Management (ID.AM): The data, personnel, devices, systems, and facilities that enable the organization to achieve business purposes are identified and managed consistent with their relative importance to organizational objectives and the organization’s risk strategy. |
| Subcategory |
| ID.AM-1: Physical Devices and Systems |
| ID.AM-2: Inventory of Organizational Software Platforms and Applications |
| ID.AM-3: Organizational Communication and Data Flows are Mapped. |
| ID.AM-4: External Information Systems are Catalogued. |
| ID.AM-5: Resource Prioritization: Classification, Criticality, and Business Value |
| ID.AM-6: Establishing Cybersecurity Roles & Responsibilities for All |
| Function and Category |
| Identity (ID) Business Environment (ID.BE): The organization’s mission, objectives, stakeholders, and activities are understood and prioritized; this information is used to inform cybersecurity roles, responsibilities, and risk management decisions. |
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| Subcategory |
| ID Resilience Requirements for Critical Service Delivery |
| ID.BE-1: The Organization’s Role in the Supply Chain is Identified and Communicated |
| ID.BE-2: Identifying & Communicating Organization's Role in Critical Infrastructure & Industry Sector |
| ID.BE-3: Setting & Sharing Organizational Mission, Objectives, & Activities |
| ID.BE-4: Dependencies and Critical Functions for Delivery of Critical Services are Established. |
| ID.BE-5: Resilience Requirements for Critical Service Delivery |
| Function and Category |
| Identity (ID) Governance (ID. GV): The policies, procedures, and processes to manage and monitor the organization’s regulatory, legal, risk, environmental, and operational requirements are understood and inform the management of cybersecurity risk. |
| Subcategory |
| ID. GV-1: Organizational cybersecurity policy is established and communicated. |
| ID. GV-2: Coordinating Cybersecurity Roles & Responsibilities |
| ID. GV-3: Managing Legal & Regulatory Cybersecurity Requirements |
| ID. GV-4: Governance and risk management processes address cybersecurity risks |
| Function and Category |
| Identity (ID) Risk Assessment (ID.RA): The organization understands the cybersecurity risk to organizational operations (including mission, functions, image, or reputation), organizational assets, and individuals. |
| Subcategory |
| ID.RA-1: Asset vulnerabilities are identified and documented. |
| ID.RA-2: Cyber threat intelligence is received from information sharing forums and sources. |
| ID.RA-3: Threats, both internal and external, are identified and documented. |
| ID.RA-4: Potential business impacts and likelihoods are identified. |
| ID.RA-5: Threats, vulnerabilities, likelihoods, and impacts are used to determine risk. |
| ID.RA-6: Risk responses are identified and prioritized. |
| Function and Category |
| Identity (ID) Risk Management Strategy (ID.RM): The organization’s priorities, constraints, risk tolerances, and assumptions are established and used to support operational risk decisions. |
| Subcategory |
| ID.RM-1: Establishing Stakeholder-Approved Risk Management Processes |
| ID.RM-2: Organizational risk tolerance is determined and clearly expressed. |
| ID.RM-3: Risk Tolerance Informed by Critical Infrastructure Role |
| Function and Category |
| Identity (ID) Supply Chain Risk Management (ID.SC): The organization’s priorities, constraints, risk tolerances, and assumptions are established and used to support risk decisions associated with managing supply chain risk. The organization has established and implemented the processes to identify, assess and manage supply chain risks. |
| Subcategory |
| ID.SC-1: Organizational Cyber Supply Chain Risk Management Processes |
| ID.SC-2: Cyber Supply Chain Risk Assessment for Suppliers |
| ID.SC-3: Cybersecurity & Supply Chain Risk Management Plan |
| ID.SC-4: Supplier and Partner Audits for Compliance |
| ID.SC-5: Supplier & Third-Party Response Planning & Testing |
| Function and Category |
| Protect (PR) Authentication and Access Control (PR.AC): Access to physical and logical assets and associated facilities is limited to authorized users, processes, and devices, and is managed consistent with the assessed risk of unauthorized access to authorized activities and transactions. |
| Subcategory |
| PR.AC-1: Identity & Credential Management for Authorized Entities |
| PR.AC-2: Physical access to assets is managed and protected. |
| PR.AC-3: Remote access is managed. |
| PR.AC-4: Controlled Access Management: Ensuring Least Privilege & Separation of Duties. |
| PR.AC-5: Network integrity is protected. |
| PR.AC-6: Identities are proofed and bound to credentials and asserted in interactions. |
| PR.AC-7: Users, devices, and other assets are authenticated. |
| Function and Category |
| Protect (PR) Awareness and Training (PR.AT): The organization’s personnel and partners are provided cybersecurity awareness education and are trained to perform their cybersecurity- related duties and responsibilities consistent with related policies, procedures, and agreements. |
| Subcategory |
| PR.AT-1: All Users are Informed and Trained. |
| PR.AT-2: Role Understanding for Privileged Users |
| PR.AT-3: Third-party stakeholders |
| PR.AT-4: Senior Executives' Role Clarity |
| PR.AT-5: Staff Grasp Roles & Duties. |
| Function and Category |
| Protect (PR) Data Security (PR.DS): Information and records (data) are managed consistent with the organization’s risk strategy to protect the confidentiality, integrity, and availability of information. |
| Subcategory |
| PR.DS-1: Data-At-Rest is Protected. |
| PR.DS-2: Data-in-Transit is Protected. |
| PR.DS-3: Formal Asset Management through Lifecycle |
| PR.DS-4: Adequate Capacity to Ensure Availability is Maintained. |
| PR.DS-5: Protections Against Data Leaks are Implemented. |
| PR.DS-6: Verify Integrity with Mechanisms |
| PR.DS-7: Test Separate from Production. |
| PR.DS-8: Hardware Integrity Checked with Mechanisms. |
| Function and Category |
| Protect (PR) Information Protection Processes and Procedures (PR. IP): Security policies (that address purpose, scope, roles, responsibilities, management commitment, and coordination among organizational entities), processes, and procedures are maintained and used to manage protection of information systems and assets. |
| Subcategory |
| PR.IP-1: Baseline IT/ICS Configuration Maintained |
| PR. IP-2: System Development Life Cycle Enforced. |
| PR. IP-3: Configuration Change Control Processes are in Place. |
| PR. IP-4: Information Backups Maintained & Tested. |
| PR. IP-5: Compliance with Physical Environment Policies |
| PR. IP-6: Data is Destroyed According to Policy. |
| PR. IP-7: Protection Processes are Improved. |
| PR. IP-8: Effectiveness of Protection Technologies is Shared. |
| PR. IP-9: Response and Recovery Plans in Place |
| PR. IP-10: Response and Recovery Plans are Tested. |
| PR. IP-11: HR Cybersecurity Practices |
| PR. IP-12: Develop & Implement Vulnerability Plan |
| Function and Category |
| Protect (PR) Maintenance (PR.MA): Maintenance and repairs of industrial control and information system components are performed consistent with policies and procedures. |
| Subcategory |
| PR.MA-1: Organizational Asset Maintenance & Logging |
| PR.MA-2: Approved Remote Maintenance |
| Function and Category |
| Protect (PR) Protective Technology (PR.PT): Technical security solutions are managed to ensure the security and resilience of systems and assets, consistent with related policies, procedures, and agreements. |
| Subcategory |
| PR.PT-1: Policy-Aligned Audit/Log Records. |
| PR.PT-2: Secure Removable Media & Policy |
| PR.PT-3: Systems Configured for Essential Functionality. |
| PR.PT-4: Communications and Control Networks are Protected. |
| PR.PT-5: Resilience Mechanisms Deployed |
| Function and Category |
| Detect (DE) Anomalies and Events (DE.AE): Anomalous activity is detected, and the potential impact of events is understood. |
| Subcategory |
| DE.AE-1: Network Baseline and Data Flow Management. |
| DE.AE-2: Analyze Detected Events for Attack Insights. |
| DE.AE-3: Multi-source Event Data Collection & Correlation |
| DE.AE-4: Impact of Events is Determined. |
| DE.AE-5: Incident Alert Thresholds are Established. |
| Function and Category |
| Detect (DE) Security Continuous Monitoring (DE.CM): The information system and assets are monitored to identify cybersecurity events and verify the effectiveness of protective measures. |
| Subcategory |
| DE.CM-1: Network monitors for cyber events. |
| DE.CM-2: Physical environment cybersecurity monitoring |
| DE.CM-3: Monitor personnel for cybersecurity events |
| DE.CM-4: Malicious Code is Detected. |
| DE.CM-5: Unauthorized Mobile Code is Detected. |
| DE.CM-6: Monitor External Service Providers for Cyber Events |
| DE.CM-7: Unauthorized Monitoring Protocol |
| DE.CM-8: Vulnerability scans are performed. |
| Function and Category |
| Detect (DE) Detection Processes (DE. DP): Detection processes and procedures are maintained and tested to ensure awareness of anomalous events. |
| Subcategory |
| DE. DP-1: Clear Roles for Detection Accountability |
| DE. DP-2: Detection Activities Comply with all Applicable Requirements. |
| DE. DP-3: Detection Processes are Tested. |
| DE. DP-4: Event Detection Information is Communicated. |
| DE. DP-5: Detection Processes are Continuously Improved. |
| Function and Category |
| Respond (RS) Response Planning (RS.RP): Response processes and procedures are executed and maintained, to ensure response to detected cybersecurity incidents. |
| Subcategory |
| RS.RP-1: Response Plan is Executed During or After an Incident. |
| Function and Category |
| Respond (RS) Communications (RS.CO): Response activities are coordinated with internal and external stakeholders (e.g. external support from law enforcement agencies). |
| Subcategory |
| RS.CO-1: Response Role Clarity |
| RS.CO-2: Incidents are Reported Consistent with Established Criteria. |
| RS.CO-3: Information is Shared Consistent with Response Plans. |
| RS.CO-4: Stakeholder Coordination in Response Plans |
| RS.CO-5: External Stakeholder Info Sharing for Cyber Awareness |
| Function and Category |
| Respond (RS) Analysis (RS.AN): Analysis is conducted to ensure effective response and support recovery activities. |
| Subcategory |
| RS.AN-1: Notifications from Detection Systems are Investigated. |
| RS.AN-2: The Impact of the Incident is Understood. |
| RS.AN-3: Forensics are Performed. |
| RS.AN-4: Incidents are Categorized Consistent with Response Plans. |
| RS.AN-5 Established Processes for Internal and External Vulnerability Disclosure. |
| Function and Category |
| Respond (RS) Mitigation (RS.MI): Activities are performed to prevent expansion of an event, mitigate its effects, and resolve the incident. |
| Subcategory |
| RS.MI-1: Incidents are Contained. |
| RS.MI-2: Incidents are Mitigated. |
| RS.MI-3: Mitigating New Vulnerabilities |
| Function and Category |
| Respond (RS) Improvements (RS.IM): Organizational response activities are improved by incorporating lessons learned from current and previous detection/response activities. |
| Subcategory |
| RS.MI-1: Incidents are Contained. |
| RS.MI-2: Incidents are Mitigated. |
| Function and Category |
| Recover (RC) Recovery Planning (RC.RP): Recovery processes and procedures are executed and maintained to ensure restoration of systems or assets affected by cybersecurity incidents. |
| Subcategory |
| RC.RP-1: Recovery Plan is Executed During or after a Cybersecurity Incident. |
| Function and Category |
| Recover (RC) Improvements (RC.IM): Recovery planning and processes are improved by incorporating lessons learned into future activities. |
| Subcategory |
| RC.IM-1: Recovery Plans Incorporate Lessons Learned. |
| RC.IM-2: Recovery Strategies are Updated. |
| Function and Category |
| Recover (RC) Communications (RC.CO): Restoration activities are coordinated with internal and external parties (e.g. coordinating centers, Internet Service Providers, owners of attacking systems, victims, other CSIRTs, and vendors). |
| Subcategory |
| RC.CO-1: Public Relations are Managed. |
| RC.CO-2: Reputation is Repaired After an Incident. |
| RC.CO-3: Recovery Activity Communication: Internal, External, Executive |
