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I Masked the User's Message and the Email Still Left: 7 Places PII Slips Out of a .NET 10 LLM Pipeline

The idea is simple, and I liked it immediately. Before a chat message goes to the model, swap every email, phone number, IBAN and card for a typed placeholder like [EMAIL_1] . Keep the mapping in a per-conversation vault on your side. When the answer comes back, swap the values back in. The model s…

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  1. 2026-10-31 13:00 · DEV Community — AI
    I Masked the User's Message and the Email Still Left: 7 Places PII Slips Out of a .NET 10 LLM Pipeline

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