PDF Redaction: Properly Remove Sensitive Information

PDF Redaction: Properly Remove Sensitive Information

The Black Box Trap

Many people think covering text with black shapes makes it safe. This is a dangerous misconception.

Overlay vs True Redaction

Overlay Method (Dangerous)

• Places black shapes over text
• Original text still exists inside the PDF
• Can be extracted via copy-paste
• Some viewers can show hidden content

True Redaction (Safe)

• Removes the original text data itself
• Cannot be recovered
• Requires specialized tools

Important Note

SOLO PDF's redaction uses the overlay method. For complete security needs, use professional tools.