Xml Data Decrypt

Hi,
I hope some of you can help me … and some days I get changes to my code and then log on as premium users have found in a class that crypto network and decrypt the XML file and then makes it unreadable by sniffer my problem and how to implement the code in onLoad insert and …

var = new Crypter XorCrypter ();  
 crypter.Decrypt (DataLoadedOnXmlFiles);  
if(dati_xml.loaded){
trace(this);
// this is a example string loaded from this
//"154454654478678647847847847584784786478647847847847874847847"
           vector = new Array();
            nodess= this.firstChild.childNodes;
            i = 0;
            while(i < nodess.length){
                vector [nodess*.nodeName] = nodess*.firstChild.nodeValue;
                i++;
            }
       .....

if i try put on

var test = "154454654478678647847847847584784786478647847847847874847847";
var EncrypterXML = new XorCrypter();
Decrypt = EncrypterXML.Decrypt(test);


the result is

<xmlData>
<result>OK</result>
</xmlData>


so how to insert on onLoad this function to automatic decrypt data?
sorry for my english… i’m italian (-:
regards
Marco