IEC 62443 vs ISO 27017
IEC 62443
International standard for IACS cybersecurity lifecycle frameworks
ISO 27017
International code for cloud-specific security controls
Quick Verdict
IEC 62443 secures industrial control systems with zones, security levels, and supplier certs for OT environments. ISO 27017 extends ISO 27001 for cloud, clarifying shared responsibilities. Companies adopt IEC 62443 for IACS resilience, ISO 27017 for cloud assurance.
IEC 62443
IEC 62443: Industrial automation and control systems security
Key Features
- Zones and conduits for risk-based segmentation
- Security Levels SL-T, SL-C, SL-A triad
- Shared responsibility across asset owners, integrators, suppliers
- Seven Foundational Requirements FR1-FR7 mapping
- ISASecure modular certifications for components, systems
ISO 27017
ISO/IEC 27017
Key Features
- Clarifies shared responsibilities between CSPs and CSCs
- Introduces 7 cloud-specific CLD security controls
- Tailors guidance for 37 ISO 27002 controls to cloud
- Ensures multi-tenancy segregation and VM hardening
- Enables customer monitoring of cloud service activities
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 international consensus-based series of standards for securing Industrial Automation and Control Systems (IACS). It provides a comprehensive, risk-based framework spanning governance, risk assessment, system architecture, and component requirements tailored to OT environments with unique constraints like availability and safety.
Key Components
- Four groupings: General (-1), Policies/Procedures (-2), System (-3), Components (-4).
- Seven Foundational Requirements (FR1-7) like identification, integrity, restricted flows.
- Zones/conduits model, Security Levels (SL 0-4) with SL-T/C/A.
- ISASecure certifications: SDLA (-4-1), CSA (-4-2), SSA (-3-3).
Why Organizations Use It
- Mitigates OT cyber risks impacting safety, downtime.
- Enables shared responsibility, supplier assurance.
- Supports regulatory compliance, insurance benefits, market differentiation.
- Builds auditable assurance chains via certifications.
Implementation Overview
- Phased: governance (-2-1), risk assessment (-3-2), segmentation, controls.
- Applies to critical infrastructure globally; asset owners lead.
- Involves audits, certifications for maturity (ML1-4).
ISO 27017 Details
What It Is
ISO/IEC 27017 is an international code of practice extending ISO/IEC 27002 with cloud-specific guidance for information security controls. It operates within an ISO 27001 ISMS, focusing on shared responsibilities between cloud service providers (CSPs) and customers (CSCs). Its risk-based approach addresses multi-tenancy, virtualization, and asset lifecycle risks in IaaS, PaaS, SaaS.
Key Components
- Additional implementation guidance for 37 ISO 27002 controls adapted for cloud
- 7 new CLD cloud-specific controls (e.g., shared roles, VM segregation, customer monitoring)
- Built on ISO 27001 framework for ISMS integration
- No standalone certification; evaluated during ISO 27001 audits
Why Organizations Use It
- Clarifies CSP-CSC responsibilities to prevent security gaps
- Supports regulatory alignment (e.g., GDPR) and procurement demands
- Reduces cloud incident risks like misconfigurations
- Enhances trust, differentiation for CSPs, and vendor assessment for CSCs
Implementation Overview
- Integrate via risk assessment and control mapping in existing ISMS
- Key steps: define responsibilities, harden configurations, enable monitoring
- Suited for CSPs/CSCs globally, any size with cloud use
- Joint audits with ISO 27001 typically 9-12 months (Word count: 178)
Key Differences
| Aspect | IEC 62443 | ISO 27017 |
|---|---|---|
| Scope | IACS/OT cybersecurity lifecycle, zones/conduits, SLs | Cloud-specific ISO 27002 controls, shared responsibility |
| Industry | Industrial sectors (energy, manufacturing, utilities) | All industries using cloud services (CSPs/CSCs) |
| Nature | Consensus standards series, voluntary certification | Code of practice, ISO 27001 extension, voluntary |
| Testing | ISASecure modular certs (CSA/SSA/SDLA), SL-A verification | Integrated into ISO 27001 audits, no standalone cert |
| Penalties | No legal penalties, loss of certification/market access | No legal penalties, certification lapse impacts contracts |
Scope
Industry
Nature
Testing
Penalties
Frequently Asked Questions
Common questions about IEC 62443 and ISO 27017
IEC 62443 FAQ
ISO 27017 FAQ
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