Standards Comparison

    NIS2

    Mandatory
    2022

    EU directive for cybersecurity resilience in critical sectors

    VS

    NIST 800-171

    Mandatory
    2020

    U.S. standard protecting CUI in nonfederal systems

    Quick Verdict

    NIS2 mandates EU-wide cybersecurity for critical sectors with strict reporting and fines up to 2% turnover, while NIST 800-171 provides US contractors CUI protection via contract-enforced controls and assessments. EU firms comply for regulation; US firms for federal contracts.

    Cybersecurity

    NIS2

    Directive (EU) 2022/2555 (NIS2)

    Cost
    €€€€
    Complexity
    High
    Implementation Time
    12-18 months

    Key Features

    • Broadens scope via size-cap rule to medium/large entities
    • Mandates strict 24-hour early incident warning reporting
    • Holds senior management directly accountable for compliance
    • Imposes fines up to 2% of global annual turnover
    • Requires continuous risk management and supply chain security
    Controlled Unclassified Information

    NIST 800-171

    NIST SP 800-171 Rev 3

    Cost
    €€€€
    Complexity
    High
    Implementation Time
    12-18 months

    Key Features

    • Protects CUI confidentiality in nonfederal systems
    • 97 requirements across 17 control families
    • Mandates SSP and POA&M documentation
    • Enables CUI enclave scoping and isolation
    • Aligns with DFARS and CMMC compliance

    Detailed Analysis

    A comprehensive look at the specific requirements, scope, and impact of each standard.

    NIS2 Details

    What It Is

    NIS2, officially Directive (EU) 2022/2555, is an EU regulation expanding the original NIS Directive. It establishes a high common level of cybersecurity for critical infrastructure and digital services across member states. Primary scope covers essential and important entities in sectors like energy, transport, health, and digital providers. It adopts a risk-based approach with continuous assurance, shifting from static compliance to proactive resilience.

    Key Components

    • Four pillars: risk management, incident reporting, business continuity, corporate accountability.
    • Strict timelines: 24-hour early warnings, 72-hour notifications, one-month final reports.
    • Mandates supply chain security, access controls, encryption, and staff training.
    • Built on standards like ISO 27001; no formal certification but national enforcement with spot checks.

    Why Organizations Use It

    Legal compliance avoids fines up to 2% global turnover. Enhances resilience against threats, builds stakeholder trust, and ensures operational continuity. Provides competitive edge through harmonized EU-wide security.

    Implementation Overview

    Applies to medium/large entities (>50 employees or €10M turnover) in covered sectors EU-wide. Key steps: risk assessments, incident procedures, governance setup, supplier audits. Transposition by October 2024; expect 12-18 months with ongoing monitoring.

    NIST 800-171 Details

    What It Is

    NIST SP 800-171 (Protecting Controlled Unclassified Information in Nonfederal Systems and Organizations) is a U.S. framework defining security requirements to safeguard CUI confidentiality in nonfederal systems. It employs a control-based approach tailored from NIST SP 800-53 Moderate and FIPS 200 baselines for contractors and supply chains.

    Key Components

    • 97 requirements (Rev 3) organized into 17 families (e.g., Access Control, Audit, Supply Chain Risk Management)
    • Core artifacts: System Security Plan (SSP), Plan of Action and Milestones (POA&M)
    • Assessment procedures in SP 800-171A Rev 3 (examine/interview/test)
    • Compliance model: self-assessment, third-party audits (e.g., CMMC Level 2)

    Why Organizations Use It

    • Mandatory via DFARS 252.204-7012 for DoD contractors handling CUI
    • Ensures contract eligibility, mitigates breach risks
    • Enhances supply chain trust, competitive positioning

    Implementation Overview

    • Phased: scoping CUI boundaries, gap analysis, controls deployment, evidence building
    • Targets federal contractors; scales by size/industry
    • Requires audits, continuous monitoring; 6-24 months typical

    Key Differences

    Scope

    NIS2
    EU critical infrastructure cybersecurity resilience
    NIST 800-171
    CUI confidentiality in nonfederal US systems

    Industry

    NIS2
    EU essential/important entities, medium/large orgs
    NIST 800-171
    US federal contractors, DoD supply chain

    Nature

    NIS2
    Mandatory EU directive, national transposition
    NIST 800-171
    NIST standard, contractually enforced via DFARS

    Testing

    NIS2
    Incident reporting, spot checks by authorities
    NIST 800-171
    SP 800-171A assessments, SSP/POA&M reviews

    Penalties

    NIS2
    Up to 2% global turnover fines
    NIST 800-171
    Contract loss, no direct fines

    Frequently Asked Questions

    Common questions about NIS2 and NIST 800-171

    NIS2 FAQ

    NIST 800-171 FAQ

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