PDF-Password-Protected-iText-Java

Encrypt Unprotected PDF with Password using iText in Java In this tutorial, we will learn how to use iText API to add a password in PDF and how to encrypt existing PDF to write and read data respectively. While creating password protected PDF, we need to add user password, owner password, permission, and encryption type. To encrypt existing PDF with password, iText provides PdfStamper.setEncryption which accepts same arguments as PdfWriter.setEncryption create pdf with itext java