Textbook04 - executable) is restricted to run only from a...

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Introduction The Xbox 360 DVD-ROM drive firmware hack is currently the only modification or hack available for the Xbox 360 that allows you to play properly created backup copies of Xbox 360 games. The firmware hack does NOT allow homebrew programs to run and does NOT bypass region protection. If a video game is locked to a particular region, then it will only play on an Xbox 360 of that same region. Before jumping into this modification, it is a good idea to learn how this hack works. In the most basic form, an Xbox 360’s game protection comes from two security measures. First of which is encryption. Nearly all files on an Xbox 360 game disc as well as the Xbox 360 hard drive are signed with Microsoft’s private key. If anything in these files, even just a single bit, is changed, the signature is broken and the Xbox 360 refuses to run the file. The second security measure is media locking. The default.xex (game
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Unformatted text preview: executable) is restricted to run only from a certain type of media. For example, all Xbox 360 games are restricted to run only from Xbox 360 media. Before the firmware hacks, if you were to copy an Xbox 360 game and try running it from DVD+R DL the Xbox 360 would obviously see that it wasnt Xbox 360 media and refuse to run it because of the media restriction. This media restriction is what the firmware hacks bypass. The firmware fakes out the Xbox 360 into thinking that any media is Xbox 360 media. You copy your game to DVD+R DL, insert it into a firmware-hacked drive, and instead of returning DVD+R DL to the Xbox 360, the drive says it is an Xbox 360 disc and it then plays the game. As you can see, the firmware hack does not bypass any signature protection whatsoever. That is why the Xbox 360 backups have to be 1:1 unedited backups of the Xbox 360 games....
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This note was uploaded on 02/22/2012 for the course ECON 101 taught by Professor Jim during the Spring '11 term at Aberystwyth University.

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