Document protection and encryption methods and properties: 

	AllowChangeDocument	This property gets or sets permissions for document changing.
	AllowCopyContent	This property gets or sets a document's copy permissions.
	AllowPrintDocument	This property gets or sets document printing permissions.
	DocumentEncryption	This property gets or sets the PDF document's encryption level.
	OwnerPassword	This property gets or sets the password for edit protection of the PDF document.
	SetSecurityFlagsRaw	This method sets the raw PDF document's user access permissions as a 32-bit unsigned integer value.
	UserPassword	This property gets or sets the password for view protection of the PDF document.