WCAG
Global standard for accessible web content
ISO 27017
International standard for cloud security controls
Quick Verdict
WCAG ensures web accessibility for people with disabilities via testable success criteria, while ISO 27017 provides cloud security controls within ISO 27001 ISMS. Organizations adopt WCAG for legal/UX compliance; ISO 27017 for cloud risk management and procurement trust.
WCAG
Web Content Accessibility Guidelines (WCAG) 2.2
Key Features
- Four POUR principles organize accessibility requirements
- Testable success criteria at A/AA/AAA conformance levels
- Technology-agnostic for all web content and platforms
- Backward-compatible additive updates across versions
- Informative techniques separate from normative criteria
ISO 27017
ISO/IEC 27017:2015 Code of practice for cloud security
Key Features
- Clarifies shared responsibilities between CSPs and CSCs
- Adds 7 cloud-specific CLD security controls
- Provides guidance for 37 ISO 27002 controls in cloud
- Addresses multi-tenancy and VM segregation risks
- Integrates seamlessly with ISO 27001 certification
Detailed Analysis
A comprehensive look at the specific requirements, scope, and impact of each standard.
WCAG Details
What It Is
Web Content Accessibility Guidelines (WCAG) 2.2 is the W3C's technology-agnostic standard for web accessibility. It provides testable success criteria to make content perceivable, operable, understandable, and robust for people with disabilities, covering websites, apps, and digital documents.
Key Components
- **Four POUR principlesPerceivable, Operable, Understandable, Robust.
- 13 guidelines with ~90 success criteria at Levels A, AA, AAA.
- Informative techniques, failures, and understanding documents.
- Conformance requires full pages, complete processes, accessibility-supported tech, non-interference.
Why Organizations Use It
Meets legal benchmarks (ADA, Section 508, EN 301 549, EAA); reduces litigation risk; expands market reach; improves UX/SEO; enhances reputation and procurement eligibility.
Implementation Overview
Phased program: policy, assessment, remediation via design systems/CI tools, training, audits. Applies to all organizations; AA is common target; no formal certification but VPAT/ACR reports used.
ISO 27017 Details
What It Is
ISO/IEC 27017:2015 is a code of practice extending ISO/IEC 27002 with guidance for information security controls in cloud services. It targets cloud service providers (CSPs) and customers (CSCs), focusing on cloud-specific risks like multi-tenancy and shared responsibilities within a risk-based ISO 27001 ISMS.
Key Components
- 37 adapted controls from ISO 27002 for cloud contexts
- 7 new CLD controls (e.g., responsibility delineation, VM segregation, asset removal)
- Built on ISO 27001 framework
- No standalone certification; integrated into ISO 27001 audits
Why Organizations Use It
Drives procurement trust, regulatory alignment (e.g., GDPR), and risk reduction in cloud. Offers competitive differentiation for CSPs, clarifies shared duties, and enhances stakeholder confidence through auditable cloud security.
Implementation Overview
Integrate via risk assessment, control mapping, and SoA updates in existing ISMS. Applies globally to CSPs/CSCs of all sizes; joint audits take 9-12 months. Focuses on configuration, monitoring, and contracts.
Key Differences
| Aspect | WCAG | ISO 27017 |
|---|---|---|
| Scope | Web content accessibility for disabilities | Cloud-specific information security controls |
| Industry | All web-publishing organizations globally | Cloud providers and customers worldwide |
| Nature | Voluntary W3C guidelines, conformance claims | Guidance extending ISO 27001 certification |
| Testing | Automated/manual/AT/user testing, no certification | ISO 27001 audits including cloud controls |
| Penalties | Litigation risk, no direct penalties | Loss of certification, no legal penalties |
Scope
Industry
Nature
Testing
Penalties
Frequently Asked Questions
Common questions about WCAG and ISO 27017
WCAG FAQ
ISO 27017 FAQ
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