Password Protecting PDFs

Watch the Video

How to Password Protect PDF

The following steps and C# example code illustrate password protecting a new PDF document.

Steps to Password Protect PDF

1. Create a Document object.
2. Create a Page object and add it to the Document instance.
3. Create a Aes256Security object by setting the owner and user password.
4. Set the Document object's security.
5. Add the Document object's Draw method to draw and save the PDF document.

Sample Code - C#

Document document = new Document();      
Page page = new Page();
document.Pages.Add(page);
Aes256Security security = new Aes256Security("owner", "user");
document.Security = security;
document.Draw("output.pdf");

How to Add Password to Existing PDF

The following steps and C# example code illustrate password protecting an existing PDF document.

Steps to Add Password to Existing PDF

1. Create a MergeDocument object with the path to the PDF file.
2. Create a Aes256Security object by setting the owner and user password.
3. Set the Document object's security.
4. Add the Draw method to save the merged PDF.

Sample code - C#

MergeDocument document = new MergeDocument("pdf-a.pdf");
Aes256Security security = new Aes256Security("owner", "user");
document.Security = security;
document.Draw(@"Output.pdf");

GitHub Project

Examples are provided in C# and VB.NET. Clone or view the example project at GitHub. This example code is contained in the following files.

• C# - PasswordProtectPDF.cs
• VB.NET - PasswordProtectPDF.vb

Getting Started

Get started easily by installing DynamicPDF Core Suite for .NET through NuGet or manually. Then, refer to the documentation for more information on using and purchasing the product.

NuGet Package

The easiest way to install DynamicPDF Core Suite is by obtaining the NuGet package using Visual Studio's Package Manager. You can also obtain the NuGet package by downloading it directly. Refer to the installation documentation for more information.

DynamicPDF Core Suite for .NET Information

DynamicPDF Core Suite for .NET combines creating, merging, and visual report creation into one powerful product for creating PDF documents. It is ideal for anyone who needs to generate PDF documents or reports or work with existing PDFs in their applications. With a free Evaluation Edition to try and with flexible and royalty-free licensing options, why not start using DynamicPDF Core Suite for .NET today!

• DynamicPDF Core Suite for .NET Product Page
• [DynamicPDF Core Suite for .NET Documentation](/docs/dotnet/dynamic-pdf-core-suite-welcome ")

More Information on Password Protecting

• Refer to the Security documentation topic, or
• Chapter 14, Securing PDF Documents, in the book DynamicPDF Core Suite for .NET by Example available on GitHub.

Available on Other Platforms

DynamicPDF Core Suite is also available for the Java and COM/ActiveX platforms. Refer to the respective product pages for more details.

• DynamicPDF Generator
  • Java - DynamicPDF Generator for Java
  • COM/ActiveX - DynamicPDF Generator for COM/ActiveX
• DynamicPDF Merger
  • Java - DynamicPDF Merger for Java
  • COM/ActiveX - DynamicPDF Merger for COM/ActiveX