Indian-PII Shield: Drop-In OpenAI Proxy for India's DPDP Act 2023
Prepared for Week 2: Side Hustle . What I Built Turn raw customer messages, KYC documents, and loan queries into sanitized, zero-leakage LLM prompts and seamlessly restore the original values into the response. Indian product teams at fintech, healthtech, and edtech startups face statutory penalties of up to ₹250 Crore (~$30M USD) under India's Digital Personal Data Protection (DPDP) Act 2023…
Indian-PII Shield is a drop-in OpenAI proxy designed for Indian businesses operating under the Digital Personal Data Protection (DPDP) Act 2023. FinTech, HealthTech, and EdTech startups face penalties up to ₹250 crore for leaking sensitive citizen identifiers into external clouds. Indian-PII Shield costs ₹500 per month for a dedicated private cloud Enterprise VPC.
It is engineered as an asynchronous reverse proxy, intercepting OpenAI chat completions requests and sanitizing them to protect PII before forwarding to the LLM. The core architecture incorporates deterministic checksum mathematics for Aadhaar, GSTIN, and card numbers, Indic Contextual NER for handling Indian name formats, and a Temporal Durable DAG for privacy lifecycle management.
The system ensures zero disk storage of raw PII and achieves 5.70 ms p50 CPU latency. The solution was demonstrated to a fintech lead who highlighted compliance challenges with handling Aadhaar and UPI data. The entire system is deployed on Render, offering a judge access to the application and a health check endpoint.
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