Local Pii Anonymization Before Llm Transmission

via “pii detection and anonymization with stateful vault storage”

Open-source LLM input/output security scanner toolkit.

Unique: Integrates stateful Vault class for PII storage and recovery, enabling reversible anonymization workflows; combines regex pattern matching for structured PII (SSN, credit card) with NER models for unstructured PII (names, organizations), supporting both detection and remediation in a single component

vs others: More comprehensive than simple regex-based PII detection because it includes NER for context-aware entity recognition; unlike external PII masking services, runs locally with no API calls, enabling offline operation and compliance with data residency requirements; Vault system enables de-anonymization, supporting workflows where original values must be recovered