Guides
Sharing a document without sharing too much
Practical guides, organised by situation: what to mask, how to mask it so that it stays masked, and how to check the result.
How to redact a PDF permanently
Redacting a PDF means removing information from the file, not hiding it on screen. Here is the method, the traps, and how to check the result.
Why a black box over text does not redact anything
Drawing a black rectangle over a name hides it on screen, and nowhere else. The text stays in the file, one copy and paste away.
Masking an IBAN, a NIR or a SIRET in a document
Bank details, social security numbers and company numbers sit in payslips, statements and invoices. Each says more than it seems, and each has a check digit that helps find it.
Answering a subject access request without disclosing other people
A person who asks for their data is entitled to a copy of it. The other people named in the same documents are entitled to stay out of it.
Anonymising CVs for blind recruitment
Reading an application without the name, the photo or the address keeps attention on experience and skills. Here is what to mask, what to keep and how to organise it.
Preparing a document before sending it to an AI tool
Summarising a contract, rewording a report, analysing a table: AI assistants are useful. What you paste into them leaves your computer.
Anonymising offline or online: what changes
To remove personal data from a document, many tools ask you to upload it first. Before choosing, look at where the document goes and who can see it.
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