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Hightouch Match Booster — Implementation and PII Hashing (2026)

Hightouch Match Booster implementation documentation covering identity graph enrichment, PII hashing (SHA256/MD5) for emails and phone numbers, match key types (email, phone, MAIDs, postal addresses, IP addresses), household-level matching, CTV ID translation, and secure mapping of hashed primary keys against third-party identity graph.

hightouch.com — view original source
confidence 85%v1published 2026indexed May 23, 2026hightouch, match-booster, pii-hashing, advertising-audiences, identity-resolution, vendor-doc, curriculum

Hightouch Match Booster — Implementation and PII Hashing (2026)

Official Hightouch documentation for Match Booster, which enriches first-party identifiers by matching them against Hightouch's third-party identity graph to add additional emails, phone numbers, device IDs, and other identifiers for ad platform targeting.

PII Hashing

Match Booster only supports hashed (SHA256 or MD5) identifiers for emails and phone numbers. Hashed values must be lowercased and trimmed before hashing. Other PII identifiers (postal addresses, IP addresses) are accepted in raw unhashed format. Hightouch creates a secure mapping between hashed primary keys and the identity graph without storing raw PII.

Match Key Types

Known users: email (raw or hashed), phone number, mobile advertising IDs (MAIDs), full postal address. Anonymous users: IP addresses. Conversion events: email, phone.

Enriched Output Identifiers

Hashed emails, hashed phone numbers, MAIDs, IP addresses, postal address components.

Advanced Features

Curriculum Relevance

This page is the authoritative source for the configure-streaming-activation-destination curriculum node's PII-safe delivery claims, replacing the 404'd /docs/audiences/advertising-audiences URL referenced in the Phase 3 Module 6 curriculum plan.