Security & Encryption
New
Load and save password-protected PDFs, choose RC4/AES encryption, and apply document permissions.
Xceed.PDF.NET
Create an encrypted PDF, load it back with a password, modify it, then save it encrypted again. Features marked New are part of PDFLibrary for .NET v3.0.
Password-protected load & save
New
The demo saves with SaveOptions.Encryption. When the selected profile and permissions
allow modifications, it also reloads the encrypted bytes with the owner password before saving the final protected document.