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How do you keep secrets and credentials out of LLM prompts, logs, and training data?

LLM apps leak secrets in three quiet places: the prompt, the logs, and the next training set. Each needs a different control. Here is how to close all three.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

LLM apps leak secrets in three quiet places: the prompt, the logs, and the next training set. Each needs a different control. Here is how to close all three.

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