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This tutorial demonstrates how to password protect a PDF document using dynamic PDF coresuite4.net. Setting password protection and encrypting a PDF document can be achieved with just a few lines of code. When a user password is specified, the PDF viewer will require the password to open the document. Dynamic PDF supports AES 128, AES 256, RC-4128, and RC-440 security encryption settings, but it is recommended to use AES 128 or AES 256 for better security. The tutorial uses the AES 256 security encryption setting. To get started, open Visual Studio, create a new project named "Encryption Example," select the consoleapplication.net core template, and add the Core Suite NuGet package.
