PDF Encryption & Decryption

VB C#

using IronPdf;
using System;

//Open an Encrypted File, alternatively create a new PDF from Html

var pdf = PdfDocument.FromFile("encrypted.pdf", "password");

//Edit file metadata
pdf.MetaData.Author = "Satoshi Nakamoto";
pdf.MetaData.Keywords = "SEO, Friendly";
pdf.MetaData.ModifiedDate = DateTime.Now;

//Edit file security settings

//The following code makes a PDF read only and will disallow copy & paste and printing
pdf.SecuritySettings.RemovePasswordsAndEncryption();
pdf.SecuritySettings.MakePdfDocumentReadOnly("secret-key");
pdf.SecuritySettings.AllowUserAnnotations = false;
pdf.SecuritySettings.AllowUserCopyPasteContent = false;
pdf.SecuritySettings.AllowUserFormData = false;
pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.FullPrintRights;

// change or set the document encrpytion password
pdf.Password = "my-password";
pdf.SaveAs("secured.pdf");

Imports IronPdf
Imports System

'Open an Encrypted File, alternatively create a new PDF from Html

Private pdf = PdfDocument.FromFile("encrypted.pdf", "password")

'Edit file metadata
pdf.MetaData.Author = "Satoshi Nakamoto"
pdf.MetaData.Keywords = "SEO, Friendly"
pdf.MetaData.ModifiedDate = DateTime.Now

'Edit file security settings

'The following code makes a PDF read only and will disallow copy & paste and printing
pdf.SecuritySettings.RemovePasswordsAndEncryption()
pdf.SecuritySettings.MakePdfDocumentReadOnly("secret-key")
pdf.SecuritySettings.AllowUserAnnotations = False
pdf.SecuritySettings.AllowUserCopyPasteContent = False
pdf.SecuritySettings.AllowUserFormData = False
pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.FullPrintRights

' change or set the document encrpytion password
pdf.Password = "my-password"
pdf.SaveAs("secured.pdf")

Install-Package IronPdf

PDF Encryption & Decryption

Your business is spending too much on yearly subscriptions for PDF security and compliance. Consider IronSecureDoc, the Comprehensive PDF Security Solution, which provides solutions for managing SaaS services like digital signing, redaction, encryption, and protection, all for a one-time payment. Explore IronSecureDoc Documentation

Granular meta-data and security settings can be applied. This now includes the ability to limit PDF documents to be unprintable, readonly, and encrypted. 128-bit encryption, decryption, and password protection of PDF documents are supported.