Dataiku Releases Kiji Privacy Proxy — Open-Source PII Masking for LLM API Requests, Sub-100ms Latency

GitHub / Help Net Security·medium signal

Dataiku released Kiji Privacy Proxy under Apache 2.0, an open-source local gateway that detects and masks 16+ categories of PII (SSNs, emails, credit cards, IPs) before requests leave the network to services like OpenAI or Anthropic. The tool substitutes detected entries with realistic dummy values, forwards masked requests upstream, and restores originals in the response — all with sub-100ms latency and fully local inference. Both the ML model and training data are published on HuggingFace for reproducibility.