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    Standards Comparison

    DORA vs ISO 27017

    DORA

    Mandatory
    2023

    EU regulation for financial sector digital operational resilience

    VS

    ISO 27017

    Voluntary
    2015

    International standard for cloud security controls.

    Quick Verdict

    DORA mandates ICT resilience for EU finance firms via testing and reporting, while ISO 27017 provides voluntary cloud security guidance for global organizations. Finance entities adopt DORA for compliance; others use 27017 to enhance cloud controls within ISO 27001.

    Digital Operational Resilience

    DORA

    Regulation (EU) 2022/2554, Digital Operational Resilience Act

    Cost
    €€€€
    Complexity
    Medium
    Implementation Time
    18-24 months

    Key Features

    • Harmonizes ICT resilience rules across 27 EU states
    • Mandates management-approved ICT risk frameworks with reviews
    • Enforces 4-hour reporting for major ICT incidents
    • Requires triennial threat-led penetration testing for critical entities
    • Oversees critical third-party ICT providers via ESAs
    Cloud Security

    ISO 27017

    ISO/IEC 27017:2015 Code of practice for cloud security controls

    Cost
    €€€
    Complexity
    Medium
    Implementation Time
    6-12 months

    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 ISMS audits

    Detailed Analysis

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

    DORA Details

    What It Is

    Digital Operational Resilience Act (DORA), Regulation (EU) 2022/2554, is a transformative EU regulation that entered full application on January 17, 2025. It bolsters ICT resilience for 20 financial entity types and critical third-party providers (CTPPs) against disruptions like cyberattacks. Adopts a proactive, risk-based approach harmonizing national rules into comprehensive resilience strategies.

    Key Components

    • **ICT Risk ManagementFrameworks for identifying, mitigating risks with annual reviews and proportionality.
    • **Incident Reporting4-hour initial, 72-hour intermediate, 1-month root-cause for major incidents.
    • **Resilience TestingAnnual vulnerability scans; triennial TLPT for critical functions.
    • **Third-Party OversightDue diligence, standardized contracts, ESA supervision of CTPPs. Enforced via RTS/ITS (2024 batches); fines up to 2% global turnover.

    Why Organizations Use It

    Mandatory for ~22,000 EU entities to avoid penalties amid rising threats (74% ransomware hit). Enhances systemic resilience, stakeholder trust, cross-border harmony; catalyzes cybersecurity investments (€10-15B EU spend).

    Implementation Overview

    Conduct gap analyses, build frameworks, testing plans, vendor mapping per proportionality. Tailored for entity size; focuses SMEs on basics. Supervisory audits by ESAs; prep accelerated by 2024 standards.

    ISO 27017 Details

    What It Is

    ISO/IEC 27017:2015 is a code of practice for information security controls tailored to cloud services. It extends ISO/IEC 27002 with cloud-specific guidance, adopting a risk-based approach within an ISO 27001 ISMS framework.

    Key Components

    • Guidance on 37 existing ISO 27002 controls adapted for cloud.
    • 7 additional cloud-specific 'CLD' controls (e.g., shared responsibilities, virtual machine segregation).
    • Built on ISO 27001 ISMS; not standalone certification but integrated audit scope.

    Why Organizations Use It

    • Clarifies shared responsibilities between CSPs and CSCs.
    • Addresses multi-tenancy, virtualization risks for compliance (GDPR, CCPA).
    • Enhances risk management, procurement trust, competitive differentiation.

    Implementation Overview

    • Integrate into existing ISO 27001 via risk assessment and SoA updates.
    • Key activities: control mapping, configuration hardening, monitoring setup.
    • Suited for CSPs, CSCs across sizes/industries; audited as ISO 27001 extension.

    Key Differences

    AspectDORAISO 27017
    ScopeDigital resilience in financeCloud security controls
    IndustryEU financial entities onlyAll cloud-using organizations globally
    NatureMandatory EU regulationVoluntary ISO guidance standard
    TestingAnnual tests, triennial TLPTISO 27001 audit integration
    PenaltiesUp to 2% global turnover finesNo legal penalties, certification loss

    Scope

    DORA
    Digital resilience in finance
    ISO 27017
    Cloud security controls

    Industry

    DORA
    EU financial entities only
    ISO 27017
    All cloud-using organizations globally

    Nature

    DORA
    Mandatory EU regulation
    ISO 27017
    Voluntary ISO guidance standard

    Testing

    DORA
    Annual tests, triennial TLPT
    ISO 27017
    ISO 27001 audit integration

    Penalties

    DORA
    Up to 2% global turnover fines
    ISO 27017
    No legal penalties, certification loss

    Frequently Asked Questions

    Common questions about DORA and ISO 27017

    DORA FAQ

    ISO 27017 FAQ

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