Password Protected PDF Files Using Java iText

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import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.PdfWriter;
import com.itextpdf.text.pdf.codec.Base64.OutputStream;

public class JavaiTextPasswordProtectedPDF {

	private static String USER_PASSWORD = "password";
	private static String OWNER_PASSWORD = "javascan";

	public static void main(String[] args) {

		try {
			FileOutputStream file = new FileOutputStream(new File("PasswordProtected.pdf"));
			Document document = new Document();
			PdfWriter writer = PdfWriter.getInstance(document, file);

			writer.setEncryption(USER_PASSWORD.getBytes(), OWNER_PASSWORD.getBytes(), PdfWriter.ALLOW_PRINTING,
					PdfWriter.ENCRYPTION_AES_128);

			document.open();
			document.add(new Paragraph("Password Protected pdf example !!"));
			document.close();
			file.close();

		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}
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