This password allows you to restrict certain features that can be performed on the PDF, such as printing, editing, and copying content. You can install either of them via NuGet:Ĭommercial version: Install-Package Spire.PDFįree version: Install-Package FreeSpire.PDF Encrypt PDF Documents in C# and VB.NETĪ PDF document can be encrypted with two types of passwords: document open password and permissions password.Ī document open password, also known as a user password, is required to open the encrypted PDF.Ī permissions password, also known as a master or owner password, is used to change the permission settings of the PDF. NET is also available, but it should be pointed out that it’s limited to 10 pages while loading PDF files. It’s a commercial library for creating, editing, converting and printing PDF documents. NET is used here to achieve the PDF encryption and decryption. In this article, I will demonstrate how to encrypt or decrypt PDF documents in C# and VB.NET. Additionally, PDF files are also ideal for sharing sensitive information because they cannot be edited easily and can also be encrypted with passwords to prevent the document information from unauthorized access. PDF files are widely used in business because they can preserve document formatting, style, and other information when viewed on different devices. C#/VB.NET: Encrypt or Decrypt PDF Documents
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