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Anonymisation

What is Anonymisation?

The irreversible process of altering personal data so that the individual can no longer be identified, directly or indirectly. Properly anonymised data falls outside the scope of data protection regulations such as GDPR.

Privacy

Each of these is named in at least one of the same controls as anonymisation. The number is how many controls name both.

What the standards actually require on anonymisation

Requirements naming anonymisation across 6 standards, quoted from the control text.

Selecting an anonymisation/pseudonymisation scheme should be driven by the data utility required, the threat model (motivated intruder), the data type (microdata, statistical, streaming) and the legal context (whether the goal is GDPR-out-of-scope anonymisatio...

ENISA-DPE-3.4 · Selecting an anonymisation scheme →
ETSI EN 303 6452 controls

Anonymisation techniques are applied when data is collected, processed and stored, to protect privacy, for example adding protective noise locally before data leaves the device. Status in Table B.1: R F (z) (recommendation, a should provision;

etsi-en-303-645::Provision 6-8 · Anonymisation used in collection, processing and storage →
PDPA Thailand2 controls

The data subject may request erasure, destruction or anonymisation where (1) the data is no longer necessary for its purposes; (2) consent is withdrawn and there is no other legal ground;

pdpa-thailand::S33 · Section 33 Right to erasure, destruction or anonymisation →

The retention period is the one set by law or regulation or, failing that, what the purpose requires; where the end cannot be fixed in advance (archiving in the public interest, research, statistics) retention is lawful with technical and organisational safegu...

portugal-law-no-58-2019-data-protection-implementation-act::21 · Article 21 Retention periods, destruction and anonymisation →

Questions people ask about anonymisation

What is Anonymisation?
The irreversible process of altering personal data so that the individual can no longer be identified, directly or indirectly. Properly anonymised data falls outside the scope of data protection regulations such as GDPR.
Why is Anonymisation important for compliance?
Anonymisation is a key concept in Privacy. Understanding anonymisation helps organizations meet regulatory requirements, reduce risk, and demonstrate due diligence during audits. Our compliance platform maps 1,016 frameworks with 316K cross-framework control mappings.
Which compliance frameworks address Anonymisation?
Anonymisation appears in the requirement text of ENISA Data Protection Engineering - From Theory to Practice, Jamaica Data Protection Act 2020, ETSI EN 303 645, Greece Law 4624/2019 - Hellenic Data Protection Authority (HDPA) Implementation Act, PDPA Thailand. Across these standards we have identified 14 controls that name it directly, each linked to the control text on the compliance platform.
Where can I learn more about Anonymisation?
Explore our compliance framework pages to see how anonymisation applies across different standards and regulations. Our implementation guides provide step-by-step guidance, and the compliance platform offers AI-powered analysis of how this concept maps across 1,016 frameworks.

See how Anonymisation applies across compliance frameworks

Our platform maps 1,016 frameworks with 316K cross-framework control mappings. Explore how this concept is addressed across standards.

Written and maintained by Gerard Blokdyk, The Art of Service.