Topic

De-identification and privacy

Before business data goes to an AI lab, the people in it need to be protected. De-identification removes names, contact details and other identifiers so records can't be traced back to individuals. These guides cover how that works, where it can go wrong, and which kinds of data are off-limits.

Guides

Key terms

Anonymization
Anonymization is processing data so the people it describes can no longer be identified by anyone using means reasonably likely to be used. Under GDPR and UK GDPR, truly anonymous data is no longer personal data. Pseudonymized data, where identities are only swapped for codes, still is.
De-identification
De-identification is any process that removes the link between data and the people it describes, limiting the risk of identifying anyone while keeping the data useful. The legal bar differs: HIPAA and California's CCPA each set their own test, and EU law treats pseudonymised data as still personal.
PII (personally identifiable information)
PII (personally identifiable information) is information that can identify a person, alone (like a name or email address) or combined with other linked data. US federal guidance uses "PII"; EU and UK law use "personal data" and California's CCPA uses "personal information," each with its own legal definition.

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