The breach hit fast. Logs filled with names, emails, and IDs. Sensitive data scattered across systems. No one knew the full scope because there was no complete map of the data.
GDPR compliance starts with knowing exactly where your PII lives. Personal Identifiable Information (PII) isn’t just customer emails—it’s any data that can point back to a person. To prove compliance, you need a PII catalog: a precise inventory of every field, table, and dataset containing personal data. Without it, audits fail and incident response is blind.
A strong PII catalog merges automated discovery with strict classification. Start by scanning databases, data lakes, logs, and APIs. Identify columns with names, addresses, identification numbers, IP addresses, and biometric data. Tag them with standardized metadata so they’re easy to track. Always maintain version history—regulations demand you demonstrate when data was changed, deleted, or accessed.
Link the catalog to retention policies. GDPR requires deleting data once it’s no longer needed for its original purpose. The catalog is your enforcement layer—if it’s missing from the inventory, it can’t be managed. Build integrations that flag violations in real time.