Mmastodon TechnologyCybersecurity first seen 7 h ago, last 7 h ago, peak #9

PDF redaction flaw leaves hidden text recoverable

Original: PDF redaction and hidden information: a dark box can hide a line visually while the selectable text still sits underneat

A guide circulating among security-minded users explains how PDF redaction can fail: drawing a dark box over a line hides it visually, but the underlying selectable text remains in the file. It recommends preparing a separate sharing copy and exporting redacted pages as new images, so unapproved text is genuinely removed rather than merely covered, before documents are released.

Why now: Improperly redacted PDFs keep leaking sensitive text, so practical warnings about the technique spread widely.

PDFPixoate

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Evidence

• PDF redaction and hidden information: a dark box can hide a line visually while the selectable text still sits underneath. The guide covers: • preparing a separate sharing copy • a redaction export that paints approved boxes into new page images and leaves the original text… · pixoate

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