May not be as much of a problem as you think......
The KB5 Request, containing the following plaintext string in the "Pre-Authentication" part of the Kerberos packet:
"Xbox Version=1.00.4831.5 Title=0xFFFE0000 TitleVersion=268595456"
and also
Request/Client Name = "
[email protected]"
Request/Realm = "PASSPORT.NET"
The KB5 Reply, containing the following confirmation:
Client Name = "
[email protected]"
Realm = "PASSPORT.NET"
as well as some cyphertext.
OK, ignore the returned Cyphertext, the initial handshake is given in "plaintext" and thats ALL I NEED, I can ignore the rest of the crap.
I doubt M$ will change this. and if they do ......
You know how to MOD-Chip ya Box !
You can font exploit Linux
You can even fit a 300GB drive to ya Xbox.
How hard is it to re-roll a previous version of ya Dash via FTP

?
Like I say, Not a problem !