Data Anonymization Techniques

Interactive demo of the anonymization spectrum — from deidentification to subjective anonymization

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Deidentification

High Re-ID Risk

Definition: Altering/removing direct identifiers (name, SSN, email) but quasi-identifiers remain.

Regulatory: Still falls under GDPR — not considered anonymous.

AI Training: Dangerous — quasi-identifiers enable re-identification.

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Pseudonymization

Moderate Risk

Definition: Replacing identifiers with artificial keys.

Regulatory: Supports security, not anonymity.

AI Training: Conditional.

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Objective Anonymization

Zero Risk

Definition: Irreversibly stripped data.

Regulatory: The gold standard.

AI Training: Increasingly impossible.

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Subjective Anonymization

Context-Dependent

Definition: Different reviewers make different judgment calls on what to remove — no fixed standard.

Regulatory: The new paradigm — context-driven rather than rule-driven.

AI Training: Highly viable, but consistency depends on reviewer expertise.

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