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How to prevent API keys and secrets in LLM prompts

Stop OpenAI keys, AWS credentials, and JWTs from reaching ChatGPT, Claude, or Gemini — local Secrets Guard patterns and vault-safe tokenization for developers.

Published 2026-08-28 · NoeticGuard engineering notes

A single sk-… or AKIA… pasted into ChatGPT can rotate an entire production account. Developers do it when debugging; support staff do it when sharing logs. Prevention belongs at the egress boundary — the same place you mask PII.

Developer checklist

  1. Strip secrets from log lines before they reach any LLM wrapper.
  2. Run maskPii with Secrets Guard entitlements — subscribe from Dashboard → Add-ons; see Secrets Guard.
  3. Run CLI scan on repos before enabling AI coding assistants.
  4. Deploy Browser Shield so employees cannot paste .env dumps into browser LLMs.
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