Xex files where there are much magic inside are signed in order for them to run ofcourse. No worries there for ms. Data files aren't signed but how deep "system calls" do they make in the first place? Shaders do though... Media flag is set to dvdr maybe because ms didn't have to factory press those discs ( how many were distributed?? no clue... ).
I must agree also that given all things, the emulation capability of old games when we think how good first gen was hacked, the leaked kiosk demo, it all seems to me that ms has great belief towards their security on software level. We don't even have to mention the security in hw level...
On a side note and speaking about the kiosk hexic, i think all did found the info from ummm... one file but i think it's interesting since it shows us some internal 360 executables names or then it's devbox and if theres difference i don't know:
**
Xenon target system 65.52.238.80 (65.52.238.80)
Drive FLASH is an Unknown Volume
Directory of flash:\
0 File(s) 0 bytes
09/06/2005 03:30p 397,312 bootanim.xex
09/06/2005 04:02p 401,408 bootanim.xexp1
09/06/2005 03:30p 81,920 connectx.xex
09/06/2005 04:02p 81,920 connectx.xexp1
09/06/2005 03:30p 40,960 createprofile.xex
09/06/2005 04:02p 32,768 createprofile.xexp1
09/06/2005 03:30p 2,596,864 dash.xex
09/06/2005 04:02p 2,318,336 dash.xexp1
09/06/2005 03:30p 256 dashboard.xbx
09/06/2005 03:30p 20,480 deviceselector.xex
09/06/2005 04:02p 16,384 deviceselector.xexp1
09/06/2005 03:30p 69,632 feedback.xex
09/06/2005 04:02p 45,056 feedback.xexp1
09/06/2005 03:30p 110,592 friends.xex
09/06/2005 04:02p 90,112 friends.xexp1
09/06/2005 03:30p 77,824 gamerprofile.xex
09/06/2005 04:02p 57,344 gamerprofile.xexp1
09/06/2005 03:30p 126,976 hud.xex
09/06/2005 04:02p 110,592 hud.xexp1
09/06/2005 03:30p 77,824 huduiskin.xex
09/06/2005 04:02p 77,824 huduiskin.xexp1
09/06/2005 03:30p 143,360 marketplace.xex
09/06/2005 04:02p 98,304 marketplace.xexp1
09/06/2005 03:30p 36,864 mfgbootlauncher.xex
09/06/2005 03:30p 36,864 minimediaplayer.xex
09/06/2005 04:02p 32,768 minimediaplayer.xexp1
01/01/1601 00:00a 1,536 MobileB.dat
01/01/1601 00:00a 512 MobileC.dat
01/01/1601 00:00a 592 MobileH.dat
01/01/1601 00:00a 529 MobileJ.dat
09/06/2005 03:30p 409,600 processdump.xex
09/06/2005 04:02p 409,600 processdump.xexp1
09/06/2005 03:30p 28,672 quickchat.xex
09/06/2005 04:02p 24,576 quickchat.xexp1
09/06/2005 03:30p 29 recint.ini
09/06/2005 03:30p 257,636 recovery.ttf
09/06/2005 03:30p 1,233,340 rrbkgnd.bmp
09/06/2005 03:30p 921,656 saferec.bmp
09/06/2005 03:30p 49,152 signin.xex
09/06/2005 04:02p 36,864 signin.xexp1
09/06/2005 04:02p 322,768 sysupdate.xexp1
09/01/2005 05:13p 16,384 testxex.xex
09/06/2005 03:30p 20,480 updater.xex
09/06/2005 04:02p 20,480 updater.xexp1
09/06/2005 03:30p 114,688 vk.xex
09/06/2005 04:02p 110,592 vk.xexp1
09/06/2005 03:30p 86,016 voicemail.xex
09/06/2005 04:02p 86,016 voicemail.xexp1
09/06/2005 03:30p 1,236,992 xam.xex
09/06/2005 04:02p 1,216,512 xam.xexp1
09/06/2005 03:30p 36,864 xapi.xex
09/06/2005 04:02p 36,864 xapi.xexp1
09/06/2005 03:30p 36,864 xapid.xex
09/06/2005 03:30p 102,400 xbdm.xex
09/06/2005 04:02p 98,304 xbdm.xexp1
09/06/2005 03:30p 405,504 xbupdate.xex
09/06/2005 04:02p 303,104 xbupdate.xexp1
09/06/2005 03:30p 1,159,168 xenonclatin.xtt
09/06/2005 03:30p 1,736,704 xenonjklatin.xtt
09/06/2005 03:30p 589,824 ximedic.xex
09/06/2005 04:02p 589,824 ximedic.xexp1
09/06/2005 03:30p 9,183,232 xlaunch.fdf
09/06/2005 03:31p 92,672 xlaunch.strings
09/06/2005 03:31p 1,318,912 xshell.xex
09/06/2005 04:02p 1,318,912 xshell.xexp1
0 dir(s) 0 bytes free