Tag
Encryption
Password protection and encryption: the difference between an open password and a permissions password, why one is real security and the other is a polite request, and choosing between AES-128 and AES-256.
8 posts
How to Compress a Password-Protected PDF Safely
Understand why encrypted PDFs cannot be compressed directly, how to make an authorized working copy, and why compression can affect digital signatures.
PDFs and Zero Trust Document Security
Zero Trust is the security model that replaced the old perimeter-based approach. Instead of "trust everything inside the network, distrust everything outside"…
How to Detect Tampered PDFs: Signs, Tools, and Forensics
A PDF that has been altered after being shared, signed, or archived can have legal, financial, or operational consequences. Detecting tampering is sometimes…
PDF Permissions Explained: Print, Copy, Edit, and Why They Are Advisory
When you encrypt a PDF, your tool usually offers checkboxes: allow printing? allow copying? allow form filling? allow modifications? These are PDF permissions…
AES-128 vs AES-256 for PDF Encryption: What the Difference Actually Means
When you encrypt a PDF, your tool usually offers a choice between AES-128 and AES-256. Pick the bigger number and move on, right? Mostly yes, but the choice…
PDF Encryption Explained: AES, Passwords, and Permissions
PDF encryption is one of those features everyone uses occasionally but few understand well. The result is files that feel secure but aren't, or files that are…
How to Remove a Password from a PDF
Your bank sends statements encrypted with your date of birth. A client sends a locked contract you need to annotate. Your own archive from three years ago is…
How to Password Protect a PDF for Free
PDF encryption is genuinely strong — modern files use AES-128 or AES-256, and there is no back door. But whether it protects anything depends almost entirely…