Hidden Tokens / Academy / Lesson 5
Put the real values back
Ask Claude to write the final document with the codes, then to decode it: Hidden Tokens replaces each code with its real value and writes the Word or Excel file on your computer, formatting intact. The decoded file never appears in the conversation and must never be given back to the AI.
Before you start
You need Claude Desktop with the Hidden Tokens connector and the Academy practice folder from
lesson 2. Decoding uses the key that stays on your computer.
Step by step
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Ask for the document, written with the codes
In the conversation from lesson 3, ask: Draft a letter before claim to the supplier, ready to send. Claude writes it with the codes, because codes are all it has: COMPANY-002 for the supplier, NAME-001 for the client's director.
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Ask Hidden Tokens to write the Word file
Then ask: Give me this letter as a Word document with the real names. Claude hands the text to Hidden Tokens, which replaces every code with its real value and writes a
.docxin theHidden-Tokenssubfolder; its name contains-decode-. Claude only gets back the name of the file, never its content. -
Open the decoded file
Open the
…-decode-….docxfile in Word: the supplier, the client and the director have their real names back, headings and bold intact. Check it as you would check any draft before sending it. -
Decode a Word file you edited yourself
You can also work in Word on the coded copy (
01-letter-to-client-anonymise.docx), save it, and ask Claude: Decode my edited letter. Hidden Tokens writes the decoded copy next to it, comments and headers included.
What can go wrong
- Claude pastes the real names into the conversation. It cannot: it never has them. If you see real names in the chat, they came from something you typed or attached yourself.
- A code is left in the decoded file. The AI wrote a code that does not exist in the key (a typo, or a code cut in two). Ask Claude to rewrite the passage with the exact codes, then decode again.
- You can't find the decoded file. It is in the
Hidden-Tokenssubfolder of the watched folder, and its name contains-decode-followed by the date. - You were about to send the decoded file to an AI. Don't: it contains the real values. Only the files ending
in
-anonymisego to an AI.
Check yourself
Three questions, answered on this page. Nothing is sent anywhere.
✓ Lesson done: every step ticked and every answer right. Your progress stays in this browser only.
Frequently asked questions
Can I decode a reply from ChatGPT or Gemini?
In the browser, the extension already shows the reply with the real names on your screen (lesson 4). To get a decoded Word file, the decoding tools are in Claude Desktop; for other AIs, keep their reply as coded text and decode it with Claude Desktop.
Does decoding still work after the trial?
Yes. Decoding files you already coded stays free forever, even without a subscription: your data is never held hostage.
Can a decoded file be coded again?
Yes: drop it into the watched folder like any other document, and it is coded with the same key, so the same people get the same codes.
Written for app 0.14.4 and connector 2.42.0 on . Not yet replayed on screen on Mac and Windows: if a label differs from what you see, trust your screen and tell us.