Redaction is Not Enough: When an LLM can still Infer the PII You Stripped Out
Article summary
Quick briefing — cleaned from the original RSS feed
A reader left a sharp question on my last post about redacting PII before sending prompts to an LLM. Paraphrased: If you redact "John from ACME" to "[NAME] from [COMPANY]", can the model still infer who it is? Yes. And it is worth pulling that apart, because it points to a real limit that a lot of teams miss. Redaction handles the identifiers it can see. It does not stop a model from reasoning about everything you left in. Two problems people treat as one When people say "keep PII out of my…
1Key Takeaways
- A reader left a sharp question on my last post about redacting PII before sending prompts to an LLM.
- Paraphrased: If you redact "John from ACME" to "[NAME] from [COMPANY]", can the model still infer who it is?
- And it is worth pulling that apart, because it points to a real limit that a lot of teams miss.
- Redaction handles the identifiers it can see.
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3Why it matters
Coding AI shifts how fast software ships and how much human review each change needs. DEV — ML reports that a reader left a sharp question on my last post about redacting PII before sending prompts to an LLM.
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