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Pdf API for .NET: Read/Write Encrypted PDF Files

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EO.Pdf fully supports PDF encryption. It can both read and write encrypted PDF files.

Use it in your Application

Sample code to load/save encrypted PDF file:

C# VB.NET  
>//Load inputFileName with password "1234"
PdfDocumentSecurity security = new PdfDocumentSecurity("1234");
PdfDocument doc = new PdfDocument(inputFileName, security);
 
//Set a new password "5678"
doc.Security.UserPassword = "5678";
 
//Disallow printing
doc.Security.Disallow(PdfDocumentPermissions.Printing);
 
//Save the PDF file
doc.Save(outputFileName);

The PDF encryption API not only can be used to password protect a PDF file, but can also be used to restrict file permissions. For example, it can be used to disallow user from printing a PDF file.

Detailed documentation and sample code about this feature can be found in the download package.

Additional Resources

  • Product Documentation

    All features are explained in great details in the product documentation. It also contains complete reference information for each type, property or method;

  • Samples

    The download package contains a wide variety of samples with full C# and Visual Basic.NET source code that demonstrate how to use different feature of the EO.Pdf library.

  • Technical Support

    Still have questions? Post in our support forum or contact us and we will answer them quickly. Our turn around time is among the best in the industry.