// PM> Install-Package IronPdf

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

using PdfDocument 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.SecuritySettings.OwnerPassword = "top-secret"; // password to edit the pdf
Pdf.SecuritySettings.UserPassword = "sharable";  // password to open the pdf
Pdf.SaveAs("secured.pdf");



 

' PM> Install-Package IronPdf

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

Using Pdf As PdfDocument = 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.SecuritySettings.OwnerPassword = "top-secret" ' password to edit the pdf
	Pdf.SecuritySettings.UserPassword = "sharable" ' password to open the pdf
	Pdf.SaveAs("secured.pdf")
End Using