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De‑anonymization
Privacy
Re-identification of individuals by linking datasets and auxiliary information.
Definition
De-anonymization (re-identification) occurs when anonymized or de-identified data is linked with other data sources or auxiliary information to identify individuals.
In plain English
Re-identification of individuals by linking datasets and auxiliary information.
Why this matters
Why it matters: It shows why “anonymous” claims must be tested carefully, especially when data is granular or unique.
Example
Example: Linking timestamps and locations to public information to infer a person’s identity.