Hi, I think the signature will be invalid if you alter the content of the header and/or body. This happens because one of the things the signature algorithm takes into account is the content of the header/body.
Of course, you can try it yourself by checking if your sample 02 client is still able to validate the signature of the message if it has been altered. HTH, Joana -- Joana M. F. da Trindade Visiting Scholar Center for Reliable and High-Performance Computing University of Illinois at Urbana-Champaign Personal Homepage: http://joanatrindade.wikidot.com LinkedIn: http://www.linkedin.com/in/joanatrindade
