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V23.2
Office File API
Demo Application
Install NuGet Packages
Redistribution and Deployment (.NET Framework)
.NET/.NET Core Support
Cloud Integration
Use Office File API in .NET MAUI Applications
Use Spreadsheet Document API within a Blazor Server App
Use Word Document API within a Blazor Server App
Dockerize an Office File API Application
Backend Web/REST API for Office File API
Sign Office Documents
Load and Use Custom Fonts in Office File API
Spreadsheet Document API
Word Processing Document API
PDF Document API
Get Started
Coordinate Systems
Document Generation
PDF Graphics API
Manage Documents
Additional Content
Interactive Forms
Annotations
Document Security
Document Protection
Sign Documents
Printing
XMP Metadata
Examples
Excel Export Library
Snap Report API
Zip Compression and Archive API
Barcode Generation API
Unit Conversion API
API Reference
Download CHM

PDF Document Security

The topics in this section describe how to use PDF save options to protect a PDF document with a password and sign the document with a digital signature.

  • Document Protection

    Protect a PDF document using both the owner and user passwords. In addition, you can optionally specify user permissions for printing, data extraction, document modification and interactive operations.

  • Sign Documents

    Apply a digital signature to a PDF document.