<!doctype html public "-//w3c//dtd html 4.0 transitional//en"> <html> Hi all,        I am working in a Internet based project where we are using Instant Messaging        service using Jabber Server. ( Using Win32 COM Object. )        We are implementing security featrure in Jabber IM service at client side.         While sending message, we first encrypt it, send message to server, store it at         server in encrypted form and then decrypt it at client side when he receives         message. But we are facing following problem.          1.  When we send a message to another client, It goes thr jabber server.              At that time, message is in encrypted form. When jabber server receives              encrypted message, it gives error "Invalid XML received" .          2. If we remove encryption, and send message which contains characters            like ¦ ( ascii value = 199) or other characters like that , then jabber server            responds with same error that "Invalid XML received" .              So message is not forwarded to other client.            Doesn't jabber server support these characters in message body?            If it doesn't support, then how can we encrypt it since while encryption,           these  characters will come in message body.           How can we handle this issue of security?           Can you provide some solution to this or alternative to this ?          Thanking in advance,          chandan .        </html>