Martin Schwiesow wrote: > I would like to password protect existing PDF-Forms using itext + RC4, as RC4 > works with older versions of Acrobat. > I alraedy know how to do that, but reading that note in the PDF-Reference > book makes me wondering if i need a licence in order to do that?
RC4 is (or was) a trade secret. Meanwhile somebody has published the Alleged RC4 (search for ARC4 or ARCFOUR). The ARCFOUR algorithm is in the public domain. If you look at the most recent versions of iText, you will see that the term 'RC4' isn't mentioned anywhere. We talk about 'standard encryption' (the PdfWriter constants) or ARCFOUR (the internal code). It's perfectly OK to use ARCFOUR instead of RC4. The result is the same. In other words: you don't need to do anything. br, Bruno ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions Buy the iText book: http://itext.ugent.be/itext-in-action/
