How to Redact a PDF Properly (Without Leaking the Data)
Drawing a black box over text does not remove the text. The difference between redaction and the appearance of redaction — and a workflow to make sure you're doing the first one.
Quishing on Paper: When the QR Code on a Document Is the Attack
Invoices, parking tickets, letters "from the bank" — QR codes turn documents into phishing delivery vehicles. How quishing works and how to handle codes you did not generate.