Why it matters

PII leaks violate GDPR + HIPAA + CCPA. Redaction is not optional.

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The architecture

Detection: regex patterns + ML entity detection (Google DLP).

Redaction: replace with placeholders or hash.

PII protection flowDetect PIIregex + DLP APIRedactplaceholder or hashLog / store redactednot rawDLP API more accurate than regex; combines pattern + ML detection
PII handling.
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How it works end to end

Google DLP API: entity detection for many PII types.

Placement: redact before logging (always), before storing memory (for privacy), before LLM (for sensitive queries).

Reversible redaction: token → original mapping in secure store for authorized reveal.