title: Merge encrypted Pdf files with iTextSharp
body: <p>If I try to merge pdf using iTextSharp with versions 4.0.4 + I get the error "PdfReader not opened with owner password". My first solution is downgrade to version 4.0.3 and I'll be able to merge files, but I would like to heard more solutions if possible.</p>
  
  <p>My application needs to merge all the documents related to some issue and show it to the final user. With the evolution of online documents, now we are getting problems with Secured files, because we can't merge it with iTextSharp 4.0.4+.</p>
  
  <p>It's possible to merge encrypted pdf files into a single one only to presentation without downgrade iTextSharp library to 4.0.3?</p>
  
  <p>Should I change the way I show the documentation, showing only the list of documents without merge it? The user would open 1 by 1.</p>
  
  <p>Regards</p>