PII Redaction – Masking consists of automated data protection techniques used to identify and obscure Personally Identifiable Information (PII), such as names, addresses, emails, or financial data, within AI model inputs and outputs.

In the context of an AI Gateway, these processes act as a critical privacy layer, ensuring that sensitive information is either permanently removed (Redaction) or replaced with functional equivalents like pseudonyms or placeholders (Masking) before reaching external LLM providers.

By implementing these measures, organizations can leverage third-party AI services while maintaining strict Data Integrity and Compliance with global data protection regulations (such as GDPR or CCPA) and preventing the risk of data leakage or unauthorized exposure.