Confidential agreements, tax filings, medical reports, and internal financial records require strict privacy. In this guide, you will learn how to apply military-grade AES-256 encryption to your PDF documents so only authorized recipients can view the contents.
Why Password Protection Matters
Unprotected PDFs can be opened, copied, and extracted by anyone with access to the file. Encrypting your PDF scrambles internal object streams using cryptographic algorithms, rendering the content unreadable without the correct authentication key.
AES-256 vs AES-128 Encryption
PDFRack supports both industry-standard encryption algorithms:
- AES-256 (Recommended): Advanced Encryption Standard with 256-bit keys. Military-grade security that resists brute-force and dictionary attacks.
- AES-128: Standard high security compatible with older legacy PDF viewers and older mobile devices.
How to Encrypt Your PDF on PDFRack
- Open PDFRack Protect PDF.
- Drop your PDF file into the secure dropzone.
- Enter a strong password (check the real-time strength meter).
- Click "Protect & Download PDF".
Frequently Asked Questions
Does PDFRack store or log my document password?
Never. Passwords and encryption keys are processed strictly in temporary memory and permanently discarded immediately upon download.