IEC 62443 vs AS9120B
IEC 62443
International standard for IACS cybersecurity lifecycle frameworks
AS9120B
Aerospace standard for distributor quality management systems
Quick Verdict
IEC 62443 secures industrial control systems via risk-based cybersecurity frameworks for OT environments, while AS9120B ensures aerospace distributors maintain traceability and quality. Organizations adopt IEC 62443 for cyber resilience and AS9120B for supply chain approval.
IEC 62443
IEC 62443: Industrial automation and control systems security
Key Features
- Shared-responsibility framework for owners, integrators, suppliers
- Zones and conduits model for risk-based segmentation
- Security Levels SL-T, SL-C, SL-A triad
- Seven Foundational Requirements with 140+ specs
- ISASecure modular certifications for components, systems
AS9120B
AS9120B Quality Management Systems - Requirements
Key Features
- Traceability and chain-of-custody controls for split lots
- Counterfeit and suspected unapproved parts prevention
- Risk-based external provider evaluation and flowdown
- Product preservation and configuration management
- Enhanced awareness of product safety and ethics
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 safety and availability.
Key Components
- Four groupings: General (-1), Policies (-2), System (-3), Components (-4)
- Seven Foundational Requirements (FR1-7) with 140+ system/component specs
- Zones/conduits model, Security Levels (SL 0-4), 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 cyber risks to safety, production, environment
- Enables supplier qualification, procurement specs, insurance benefits
- Builds stakeholder trust via certifications; horizontal applicability across sectors
- Supports regulatory baselines (e.g., NIS-2 alignments)
Implementation Overview
Phased approach: CSMS governance (-2-1), risk assessment/segmentation (-3-2), controls (-3-3/-4-2), audits. Applies to critical infrastructure globally; requires OT expertise, multi-year maturity progression (ML1-4).
AS9120B Details
What It Is
AS9120B is the IAQG quality management system standard for aerospace distributors, built on ISO 9001:2015's high-level structure. It targets organizations procuring, storing, splitting, and reselling parts without alteration, emphasizing risk-based thinking to address distribution risks like traceability loss and counterfeits.
Key Components
- Over 100 aerospace-specific requirements beyond ISO 9001.
- Core areas: context analysis, leadership, planning, support, operations (traceability, preservation, counterfeit prevention), performance evaluation, improvement.
- Built on PDCA cycle; requires documented information, not full procedures.
- Certification via accredited bodies, OASIS listing.
Why Organizations Use It
- Commercial necessity for OEM/Tier-1 supply chains.
- Mitigates risks of nonconformities, enhances chain-of-custody trust.
- Improves efficiency, market access (2,442 global certifications).
- Builds stakeholder confidence in product safety/authenticity.
Implementation Overview
- Phased: gap analysis, process design, training, audits (6-12 months).
- Applies to aviation/space/defense distributors globally.
- Involves cross-functional teams, internal audits, management reviews.
Key Differences
| Aspect | IEC 62443 | AS9120B |
|---|---|---|
| Scope | IACS cybersecurity lifecycle framework | Aerospace distribution quality management |
| Industry | Industrial automation, critical infrastructure global | Aviation, space, defense distributors worldwide |
| Nature | Voluntary consensus cybersecurity standards | Voluntary certification quality standard |
| Testing | ISASecure modular certifications, risk assessments | IAQG audits, internal audits, management reviews |
| Penalties | Loss of certification, supply chain exclusion | Loss of certification, market exclusion |
Scope
Industry
Nature
Testing
Penalties
Frequently Asked Questions
Common questions about IEC 62443 and AS9120B
IEC 62443 FAQ
AS9120B FAQ
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