--- title: "ISO 27018 vs GDPR (Processor Controls and Evidence Mapping)" canonical_url: "https://www.sorena.io/artifacts/global/iso-27018/iso-27018-vs-gdpr" source_url: "https://www.sorena.io/artifacts/global/iso-27018/iso-27018-vs-gdpr" author: "Sorena AI" description: "Compare ISO/IEC 27018 and GDPR for cloud processor operations." published_at: "2026-03-04" updated_at: "2026-03-04" keywords: - "ISO 27018 vs GDPR" - "ISO 27018 GDPR mapping" - "GDPR Article 28 processor contract" - "ISO 27018 subprocessor transparency" - "ISO 27018 breach notification" - "GDPR Article 32" - "GDPR Article 33" - "cloud processor evidence pack" - "GLOBAL compliance" - "ISO/IEC 27018" - "GDPR" - "Processor obligations" - "Evidence mapping" --- **[SORENA](https://www.sorena.io/)** - AI-Powered GRC Platform [Home](https://www.sorena.io/) | [Solutions](https://www.sorena.io/solutions) | [Artifacts](https://www.sorena.io/artifacts) | [About Us](https://www.sorena.io/about-us) | [Contact](https://www.sorena.io/contact) | [Portal](https://app.sorena.io) --- # ISO 27018 vs GDPR (Processor Controls and Evidence Mapping) Compare ISO/IEC 27018 and GDPR for cloud processor operations. *Comparison* *GLOBAL* ## ISO 27018 ISO 27018 vs GDPR How ISO/IEC 27018 control themes support GDPR processor obligations in practice. Use one set of cloud processor controls and one evidence model wherever the obligations overlap. GDPR is law. ISO/IEC 27018 is a code of practice for public cloud providers acting as PII processors. They are used together because GDPR tells you what processor obligations exist, while ISO 27018 gives a cloud specific control model for how to operate many of those obligations and how to evidence them for customers. ## Start with the right distinction: law versus control model GDPR creates binding duties for controllers and processors. ISO 27018 does not replace those duties and does not decide whether you are legally a controller or processor. It gives a structured set of cloud privacy controls for providers acting as processors. A strong program uses GDPR to define the legal outcome and ISO 27018 to define the operational mechanism and the evidence trail. - Use GDPR to define contract, security, and breach obligations - Use ISO 27018 to decide what procedures, records, and customer notices prove those obligations are being met ## Processor instructions and purpose limitation GDPR Article 28 requires the processor to act only on documented instructions from the controller. ISO 27018 reinforces this in cloud specific terms by saying that PII under contract should not be processed for any purpose independent of customer instructions. This is the control area where teams usually discover hidden reuse of customer data for analytics, product features, or marketing. - GDPR Article 28(3)(a): act only on documented instructions - ISO 27018: no independent processing objective for contracted PII - Evidence: service description, processor clause, change records for instructions, and approval workflow for any exception ## Confidentiality, security, and access governance GDPR Article 28 requires confidentiality commitments for persons authorized to process personal data, and Article 32 requires appropriate security of processing. ISO 27018 adds cloud specific implementation guidance around access administration, confidentiality obligations that survive termination, logging, cryptography disclosures, and user control boundaries. The useful move is to treat confidentiality, access, logging, and cryptography as one evidence family rather than separate checklist items. - GDPR Article 28(3)(b): confidentiality commitments - GDPR Article 32: appropriate security measures - ISO 27018: enforceable confidentiality, access review evidence, cloud user administration, log availability criteria, and cryptography transparency ## Subprocessors and international processing locations GDPR requires prior specific or general written authorization for subprocessors and requires the same data protection obligations to flow down. ISO 27018 makes this operational by requiring disclosure before use, timely notice of intended changes, names of relevant subprocessors, and the countries where they can process data. That country level detail is where many processor programs are weak, especially when backup or support subprocessors are involved. - GDPR Article 28(2) and 28(4): authorization and flow-down - ISO 27018: named subprocessors, country transparency, change notice, objection or termination path - Evidence: subprocessor register, country matrix, notice archive, and subprocessor contract baseline ## Disclosure requests and regulator access GDPR does not give you a full operating procedure for law enforcement or other third party disclosure requests. ISO 27018 does. It requires notification of legally binding requests unless prohibited, rejection of requests that are not legally binding, consultation where lawful, and recording of the disclosure and the authority behind it. This is a major operational benefit of ISO 27018 because cloud providers receive these requests in many different forms and jurisdictions. - GDPR baseline: process lawfully and preserve contractual commitments - ISO 27018 detail: validate legal compulsion, record disclosure source and authority source, preserve customer notice trail - Evidence: disclosure runbook, legal review log, and per-request case file ## Breach handling and notification support GDPR Article 33 places the main regulator notification duty on the controller, while processors must notify the controller without undue delay after becoming aware of a personal data breach. ISO 27018 fits this well by requiring prompt customer notice and detailed incident records, plus the contract definition of the maximum delay and required information fields. The combination works well when the cloud provider maintains a breach record that already contains the information the customer needs for legal assessment. - GDPR Article 33(2): processor notifies the controller without undue delay - ISO 27018: prompt customer notice plus structured incident record - Evidence: detection timeline, impact summary, affected data description, containment actions, and notification log ## Deletion, return, and audit support GDPR Article 28 requires deletion or return of personal data at the end of the provision of services and requires the processor to make available information necessary to demonstrate compliance. ISO 27018 adds concrete cloud specific guidance for return, transfer, disposal, backup and business continuity erasure, and the use of independent assurance when direct customer audits are impractical. That makes ISO 27018 especially useful for multi-tenant services where customer audits need a controlled alternative. - GDPR Article 28(3)(g): delete or return personal data - GDPR Article 28(3)(h): make information available and allow audits - ISO 27018: disposal policy, backup and business continuity erasure logic, independent audit evidence, and documented record retention ## Best operating model: one evidence pack, not two parallel programs The most efficient approach is to build one processor evidence pack that satisfies customer legal review and customer security review at the same time. The pack should map contract clauses to control owners, procedures, and live records. If you split GDPR evidence and ISO 27018 evidence into separate repositories, the story will drift and customer trust will drop. - Map each GDPR processor clause to one or more ISO 27018 control themes - Keep versioned records for subprocessor notices, disclosure cases, breach cases, and deletion attestations - Retain superseded procedures for a documented period, with five years as the ISO 27018 recommended minimum where no stricter rule applies *Recommended next step* *Placement: after the comparison section* ## Use ISO 27018 ISO 27018 vs GDPR as a cited research workflow Research Copilot can take ISO 27018 ISO 27018 vs GDPR from how this topic compares with adjacent regulations or standards to a reusable workflow inside Sorena. Teams working on ISO 27018 can keep owners, evidence, and next steps aligned without copying this guide into separate documents. - [Open Research Copilot for ISO 27018 ISO 27018 vs GDPR](/solutions/research-copilot.md): Start from ISO 27018 ISO 27018 vs GDPR and answer scope, timing, and interpretation questions with cited outputs. - [Talk through ISO 27018](/contact.md): Review your current process, evidence gaps, and next steps for ISO 27018 ISO 27018 vs GDPR. ## Primary sources - [ISO/IEC 27018 current standard listing](https://www.iso.org/standard/27018?ref=sorena.io) - Official ISO lifecycle source for the current edition. - [ISO/IEC 27018:2019 standard page](https://www.iso.org/standard/76559.html?ref=sorena.io) - Official ISO page for the detailed prior edition used by many existing programs. - [GDPR consolidated text](https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:02016R0679-20160504&ref=sorena.io) - Primary legal source for GDPR processor duties. - [EU controller processor SCCs](https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32021D0915&ref=sorena.io) - Useful primary source for practical processor contract structure under GDPR Article 28(7). ## Related Topic Guides - [ISO 27018 Compliance (Public Cloud PII Processor Playbook)](/artifacts/global/iso-27018/compliance.md): A practical ISO/IEC 27018 compliance playbook for public cloud PII processors. - [ISO 27018 FAQ (Public Cloud PII Processor Controls)](/artifacts/global/iso-27018/faq.md): Frequently asked questions about ISO/IEC 27018 for public cloud PII processors. - [ISO 27018 Privacy Control Checklist (Public Cloud PII Processor)](/artifacts/global/iso-27018/privacy-control-checklist.md): An ISO/IEC 27018 privacy control checklist for public cloud PII processors. - [ISO 27018 Vendor Contract Requirements (Processor Clauses and Evidence)](/artifacts/global/iso-27018/vendor-contract-requirements.md): Processor contract requirements based on ISO/IEC 27018 and GDPR. --- [Privacy Policy](https://www.sorena.io/privacy) | [Terms of Use](https://www.sorena.io/terms-of-use) | [DMCA](https://www.sorena.io/dmca) | [About Us](https://www.sorena.io/about-us) (c) 2026 Sorena AB (559573-7338). 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