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DATA PRIVACY FIREWALL

CSV Re-Identification Risk Firewall

Check whether a CSV can still identify people after names and emails are removed. It flags risky column combinations, low-k groups, sensitive fields and exports a sanitized proof packet.

Reviewed 2026-07-08

Data
Linkage risk checkLow-k group finderSensitive field screenSanitized CSV + proof receipt

Before sharing a CSV, check if rows still point to real people.

Use the sample, randomize a dataset, or paste a CSV. The result shows what to suppress, what to generalize and which rare row groups need review.

Result appears here after you build the privacy firewall.

WHY THIS IS DIFFERENT

It checks the linkage risk, not just whether a column is named email.

Removing names is not enough. This tool looks at combinations such as age, postal code, city, gender and month, then shows which equivalence classes are too small to safely share.