"richard.opalka(a)jboss.com" wrote : | You can't rely on the precondition SOAP message will be unmodified (regarding the whitespaces) on other side. Thank you for your response. But then I do not understand why signatures in WS-Security work. I would presume they depend on the same strict XML marshalling requirements. Is there maybe a separate layer in JBoss that handles SOAP messages using WS-security? Do you have any reference on why SOAP does not need to preserve the whitespace information? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4201665#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...