Hidden Tokens / Blog
Using AI with confidential files
Practical guides for lawyers, accountants, HR teams and anyone who puts client or employee data into Claude, ChatGPT, Gemini or Copilot.
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State of AI confidentiality 2026
Annual report: what professional secrecy, the GDPR, Moroccan law 09-08 and the EU AI Act ask; how 15 legal AI tools audited by the French bar answer; how well French and Moroccan personal data is detected; a market map and a 10-point checklist.
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How to use ChatGPT or Claude with client data without exposing it
Your team already pastes client files into AI. The real risks, the four ways organisations respond, and a checklist to use AI on confidential files safely.
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Pseudonymisation vs anonymisation: what the GDPR means for AI
Pseudonymised data is still personal data under the GDPR; anonymous data is not. What it means when you send documents to ChatGPT, Claude or Copilot.
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How to redact a Word or Excel file before an AI reads it
Tracked changes, hidden sheets, pivot caches, metadata: what manual redaction misses, and a repeatable method to strip client data before an AI reads it.