Accidental data disclosure is one of the leading causes of privacy violations worldwide. When preparing identity documents, salary slips, or court evidence, simply highlighting text with a black marker or drawing a black rectangle in a basic editor does NOT erase the underlying text—anyone can copy and paste the hidden words right out!
1. The Difference Between Visual Masking and True Redaction
Warning: Black Boxes Do Not Hide Text
Drawing a black shape over a citizenship number or bank balance creates an overlay layer. The underlying vector text remains in the PDF stream. True redaction permanently strips the vector characters, metadata, and coordinates from the PDF binary structure.
2. Securing Documents with AES-256 Bit Encryption
PDFNepal allows you to lock your documents using AES-256 bit encryption—the same cryptographic standard utilized by financial institutions and defense agencies. You can set:
- User Password: Required to open and read the document.
- Owner Password: Restricts printing, copying text, extracting pages, and modifying form fields.
Frequently Asked Questions
Written by Bikram Karki
Cloud Infrastructure & Optimization EngineerTechnical writer and researcher at PDFNepal, focusing on digital document standards, sovereign encryption, localized government workflows, and high-performance web tooling in Nepal.
