tamathebig.blogg.se - How to encrypt multiple pdf files

The following table lists the permission flags supported by Syncfusion PDF Library.

You can customize the permission settings to allow or restrict certain actions such as: Security.KeySize = PdfEncryptionKeySize.Key256Bit Įxecute this code example to get a PDF document like in the following screenshot. Security.Algorithm = PdfEncryptionAlgorithm.AES PdfSecurity security = document.Security PdfLoadedDocument document = new PdfLoadedDocument("PDF_Succinctly.pdf") The following code example shows how to encrypt a PDF document using a user password in C#.

Set a user password, encryption algorithm, and key size.

You can follow these three steps to encrypt an existing PDF document using Syncfusion PDF Library: You can set the algorithm and key size using the properties Algorithm and KeySize available in the class PdfSecurity. The following are the encryption standards supported: The Syncfusion PDF Library provides support for basic to advanced encryption standards.

Decrypt PDF document/remove security from PDF.

The complete details to encrypt and decrypt PDF files in C# are explained in the following topics in this post: But to change the restricted features, you need the permission password.

If the PDF is encrypted with both types of passwords, you can use either password to open it. With the Syncfusion PDF Library, you can protect your PDF documents with either of these passwords, or both of them. Permission password: A permission password, also known as master or owner password, is used to restrict options such as printing, editing, and copying content in a PDF.Document-open password: A document-open password, also known as a user password, is used to open a PDF document.PDF encryption allows users to secure PDF documents with passwords. NET PDF Library that allows users to encrypt and decrypt PDF documents in C# and VB.NET. BoldSign – Electronic Signature Software New.