IEC 62443
International standards for IACS cybersecurity frameworks
CIS Controls
Prioritized cybersecurity framework reducing attack surface
Quick Verdict
IEC 62443 delivers OT/IACS-specific lifecycle security with zones, SLs, and certifications for industrial ops, while CIS Controls provide prioritized IT hygiene across 18 domains for broad cyber resilience. Orgs adopt IEC for OT compliance, CIS for foundational defense.
IEC 62443
IEC 62443 series: IACS cybersecurity standards
Key Features
- Zone and conduit model for risk-based segmentation
- Security levels SL-T, SL-C, SL-A assurance triad
- Shared responsibilities across asset owners, integrators, suppliers
- Seven foundational requirements for systems and components
- Modular ISASecure certifications for lifecycle assurance
CIS Controls
CIS Critical Security Controls v8.1
Key Features
- 18 prioritized controls with 153 actionable safeguards
- Implementation Groups (IG1-IG3) for scalable adoption
- Mappings to NIST, ISO 27001, HIPAA, PCI DSS
- Free Benchmarks for secure configurations
- Focus on asset inventory and vulnerability management
Detailed Analysis
A comprehensive look at the specific requirements, scope, and impact of each standard.
IEC 62443 Details
What It Is
IEC 62443 is the ISA/IEC series of consensus-based standards for securing Industrial Automation and Control Systems (IACS). This framework spans governance, risk assessment, system architecture, and component requirements, using a risk-based approach with zones/conduits and security levels (SL 0-4).
Key Components
- Four groupings: General (-1), Policies (-2), System (-3), Components (-4).
- Seven foundational requirements (FR1-7: IAC, UC, SI, DC, RDF, TRE, RA).
- SL-T (target), SL-C (capability), SL-A (achieved).
- ISASecure certifications: SDLA (4-1), CSA (4-2), SSA (3-3).
Why Organizations Use It
- Mitigates OT-specific risks like safety impacts, downtime.
- Enables supplier qualification, procurement specs.
- Builds assurance chain; reduces insurance costs.
- Horizontal standard for cross-sector compliance.
Implementation Overview
Phased: CSMS establishment (2-1), risk assessment/zoning (3-2), controls (3-3/4-2). Applies to critical infrastructure; multi-year for brownfield sites. Optional ISASecure audits for certification.
CIS Controls Details
What It Is
CIS Critical Security Controls v8.1 is a community-driven, prescriptive cybersecurity framework of prioritized best practices to reduce cyber risk and enhance resilience. It applies across industries, emphasizing actionable safeguards in hybrid/cloud environments with a risk-based, phased approach via Implementation Groups (IG1–IG3).
Key Components
- 18 Controls across asset management, access control, vulnerability management, incident response, and more, with 153 measurable safeguards.
- Built on real-world attack data; scalable via IG1 (56 basic safeguards), IG2/IG3 (advanced).
- No formal certification; compliance demonstrated through self-assessment, audits, mappings to NIST, ISO 27001.
Why Organizations Use It
- Mitigates 85% common attacks, accelerates regulatory compliance (NIST, HIPAA, PCI DSS).
- Delivers ROI via efficiency, insurance discounts, vendor trust.
- Builds resilience, operational savings, competitive edge.
Implementation Overview
- Phased roadmap: governance, discovery, foundational controls (IG1), expansion (IG2/IG3), validation.
- Suits all sizes/industries; tools like Benchmarks, Navigator aid automation.
- Focus: inventories, MFA, scanning; 9–18 months typical for mid-sized to IG2.
Key Differences
| Aspect | IEC 62443 | CIS Controls |
|---|---|---|
| Scope | IACS/OT cybersecurity lifecycle, zones/conduits, SLs | General IT cybersecurity, 18 controls, 153 safeguards |
| Industry | Industrial sectors (energy, manufacturing, utilities) | All industries, IT-focused, organization-agnostic |
| Nature | Consensus standards series, voluntary certification | Prioritized best practices framework, voluntary |
| Testing | ISASecure modular certification (CSA/SSA/SDLA) | Self-assessment, IG maturity, pen testing (Control 18) |
| Penalties | No legal penalties, loss of certification/market access | No formal penalties, increased breach risk/litigation |
Scope
Industry
Nature
Testing
Penalties
Frequently Asked Questions
Common questions about IEC 62443 and CIS Controls
IEC 62443 FAQ
CIS Controls FAQ
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