AC Access control
Access control (AC) family of NIST SP 800-53 Rev. 5: account management, access enforcement, information flow, least privilege, session controls, remote, wireless and mobile access, and use of external systems.

NIST SP 800-53 Rev. 5 security and privacy controls, family by family: what each control requires, its SP 800-53B baselines, SP 800-53A assessment procedures, the evidence that passes and open-source tooling.
Access control (AC) family of NIST SP 800-53 Rev. 5: account management, access enforcement, information flow, least privilege, session controls, remote, wireless and mobile access, and use of external systems.
Awareness and training (AT) family of NIST SP 800-53 Rev. 5: security and privacy literacy training, role-based training, training records and feedback on training results.
Audit and accountability (AU) family of NIST SP 800-53 Rev. 5: which events to log, audit record content, storage, failure response, review and analysis, time stamps, protection, retention and non-repudiation.
Assessment, authorization, and monitoring (CA) family of NIST SP 800-53 Rev. 5: control assessments, information exchange agreements, plans of action and milestones, authorization to operate, continuous monitoring and penetration testing.
Configuration management (CM) family of NIST SP 800-53 Rev. 5: baseline configurations, change control, impact analysis, secure settings, least functionality, component inventory, software restrictions and signed components.
Contingency planning (CP) family of NIST SP 800-53 Rev. 5: contingency plans, training and testing, alternate storage and processing sites, telecommunications, system backup, and recovery and reconstitution.
Identification and authentication (IA) family of NIST SP 800-53 Rev. 5: authenticating organizational users, devices, services and outside users, identifier and authenticator management, identity proofing and identity providers.
The SP 800-53 Rev. 5 Incident Response family: IR policy, training, testing, handling, monitoring, reporting, assistance, the incident response plan and spillage response, with baselines, assessment procedures and evidence for each control.
The SP 800-53 Rev. 5 Maintenance family: maintenance policy, controlled and nonlocal maintenance, maintenance tools and personnel, timely and field maintenance, with baselines, assessment procedures and evidence for each control.
The SP 800-53 Rev. 5 Media Protection family: access, marking, storage, transport, sanitization, use and downgrading of digital and non-digital media, with baselines, assessment procedures and evidence for each control.
The SP 800-53 Rev. 5 Physical and Environmental Protection family: physical access authorization, control and monitoring, visitor records, power, fire, environmental and water protection, and facility siting, with baselines and assessment procedures.
The SP 800-53 Rev. 5 Planning family: planning policy, system security and privacy plans, rules of behavior, concept of operations, architectures, central management, and baseline selection and tailoring.
The SP 800-53 Rev. 5 Program Management family: organization-wide security, privacy, risk and supply chain program controls that are deployed across the organization rather than per system, with privacy baseline status and assessment procedures.
The SP 800-53 Rev. 5 Personnel Security family: position risk designation, screening, termination, transfer, access agreements, external personnel, sanctions and position descriptions, with baselines and assessment procedures.
The SP 800-53 Rev. 5 PII Processing and Transparency family: authority and purposes for processing PII, consent, privacy notices, system of records notices, specific PII categories and computer matching, all in the privacy baseline.
Risk assessment family: security categorization, risk assessments, vulnerability monitoring and scanning, risk response, privacy impact assessments, criticality analysis and threat hunting.
System and services acquisition family: SDLC, acquisition contract requirements, documentation, engineering principles, external services, developer configuration management, testing and secure development, and unsupported components.
System and communications protection family: boundary protection, transmission and at-rest encryption, key and certificate management, DNS security, session authenticity, isolation and separation controls, and time synchronization.
System and information integrity family: flaw remediation, malicious code protection, system monitoring, security alerts, integrity verification, input validation, error handling, information retention and PII quality and de-identification.
Supply chain risk management family, new in Rev. 5: the SCRM plan, supply chain controls, provenance, acquisition strategies, supplier assessments, notification agreements, tamper protection, component authenticity and disposal.
Running SP 800-53 through the NIST Risk Management Framework: security categorization, the Prepare step, roles, authorization to operate, ongoing authorization, and common control inheritance.
The documents an SP 800-53 program runs on: the system security and privacy plan, plan of action and milestones, assessment report, policies and procedures, and agreements for information exchanges.
Keeping an SP 800-53 authorization current: the ISCM strategy, FedRAMP's ongoing certification reports, vulnerability detection and remediation timeframes, and significant change notification.
Cross-cutting technical expectations that span several SP 800-53 controls: multi-factor authentication, audit logging, FIPS-validated encryption, patching, secure software development and containers.
Programs that turn SP 800-53 into contract requirements: IRS Publication 1075, CMS ARS, GovRAMP for state and local buyers, FedRAMP Recognized assessors, and building on AWS and Azure.
Automating SP 800-53 work: OSCAL documents, open-source scanners and compliance-as-code content, and self-hosted tools that produce control evidence.
Applying SP 800-53 beyond standard IT systems through overlays and dedicated control sets: operational technology, AI systems, PII processing and supply chain risk.
Questions organizations ask when an agency, contract or FedRAMP requires NIST SP 800-53: baselines, tailoring and overlays, assessment, FedRAMP, an implementation roadmap, and how 800-53 compares with ISO 27001 and SP 800-171.

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