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[YUNG ERIC]

Sorry for being noobish but what does  the NAND hold. Is this a step towards home brew for the end user??

[PhunkyGam3r]

The NAND holds the Kernel of the xbox, in Cpas's review of the chip, he was able to backup his old kernel, update to the latest LIVE! approved 4552 kernel, then downgrade easily using this chip(of course after performing the eFuse trick) we are still far away from a homebrew kernel, but just one step closer each day, all we have to do now, is figure out how they sign a bios to the specific console, and then we can make a custom BIOS for homebrew.....

[89c4l98]

QUOTE(caster420 @ Apr 16 2007, 12:03 PM)

The NAND also stores the 360 filesystem (dashboard, etc...), and your key vault (dvd-rom key, etc...).

Caster.

 So this will get your dvd key if it has been lost? Are you 100% sure?

[mlapaglia]

QUOTE(89c4l98 @ Apr 16 2007, 12:14 PM)

So this will get your dvd key if it has been lost? Are you 100% sure?

if you can break the encryption then ya i believe you can   tell us if you are able to aight?

[caster420]

QUOTE(mlapaglia @ Apr 16 2007, 12:19 PM)

if you can break the encryption then ya i believe you can   tell us if you are able to aight?

If you know the fuse values, you can in theory decrypt their encryption.  No need to 'break' it...

Caster.

[mlapaglia]

QUOTE(caster420 @ Apr 16 2007, 12:22 PM)

If you know the fuse values, you can in theory decrypt their encryption.  No need to 'break' it...

Caster.

how do we go about getting the fuse values.. or are those on the cpu?

[caster420]

QUOTE(mlapaglia @ Apr 16 2007, 12:28 PM)

how do we go about getting the fuse values.. or are those on the cpu?

They are in the cpu and the XeLL boot loader spits out the values when you boot it.  Take a look at someones boot log and you will see what i am talking about...

Quote:

If you know the fuses, you could:
 - reencrypt the keyvault, i.e. get/change DVD key,
 - get/change console certificate (but not create one),
 - get/change console private key (used for 'CON'-files),
 - change region, dvd region, ...
 - re-encrypt CF/CG, and unless i got something wrong, you could make a pre-4552 booting again.

End quote...

The last line of that quote leads me to believe that an eFuse was not 'blown' but rather had a change in value.  Thus, it resulted in different encryption of the kernel from previous backups of a kernel and is the reason a pre-4552 kernel will not boot if you did not remove r6t3, preventing this (imo) change in value.

Caster.

[mlapaglia]

that's interesting... this reminds me of something M$ said when the 360 first came out.. something like "just because a hack works on one xbox does not mean it will work on another."

maybe this is what they were talking about.

anyway, this is all off-topic, great job on this product, any step forward is a good one right?

[89c4l98]

QUOTE(caster420 @ Apr 16 2007, 12:49 PM)

So i have read.  Unfortunetly you need a drive with modified firmware (and thus a known key) to use the exploit to retrieve your fuse values.  So, you can't retrieve your key if it is lost at this point in time...

Caster.

Wel thank you for telling me I still have a real expensive dvd player but in the future Hopefully there will be a way to get the lost key

[kevhonda]

QUOTE(mlapaglia @ Apr 16 2007, 05:44 PM)

that's interesting... this reminds me of something M$ said when the 360 first came out.. something like "just because a hack works on one xbox does not mean it will work on another."

maybe this is what they were talking about.

anyway, this is all off-topic, great job on this product, any step forward is a good one right?

You read my mind! I remember them saying the exact same thing, although I thought it would be something diff. for some reason...not sure what. lol

[xEnthusist07x]

so wiat let me get this straight. what exactly does "knowing the fuses mean?" and is it ever too late to remove the r6t3?

[xEnthusist07x]

so pretty much all of us who have updated to the spring update are screwed and will always be screwed? Cause i recently was kicked off live for the NME v1.2 chip and now i am pissed, and want to mod the hell out of this box. Including a homebrew'd kernal and running linux on this. So will i ever be able to? I have the newest kernal.

[gir]

Ok, please pardon my limited understanding of the kernel downgrading and eFuse business but,
Could I use the infectus to downgrade from 4552? I removed the r6t3 before ever plugging my box in and upgrading it.
Or, would downgrading require that I had made a backup of my original kernel to begin with? Because I'm afraid i did not.

Thanks!

[caster420]

QUOTE(xEnthusist07x @ May 23 2007, 07:50 PM)

so pretty much all of us who have updated to the spring update are screwed and will always be screwed? Cause i recently was kicked off live for the NME v1.2 chip and now i am pissed, and want to mod the hell out of this box. Including a homebrew'd kernal and running linux on this. So will i ever be able to? I have the newest kernal.

You wont be able to downgrade to an exploitable kernel at this point if you havent:

1) Removed R6T3 before upgrading to 4552
2) Dump an backup of a pre-4552 kernel

You will have to hope that a new exploit is discovered in a more current kernel.

QUOTE(gir @ May 23 2007, 11:45 PM)

Ok, please pardon my limited understanding of the kernel downgrading and eFuse business but,
Could I use the infectus to downgrade from 4552? I removed the r6t3 before ever plugging my box in and upgrading it.
Or, would downgrading require that I had made a backup of my original kernel to begin with? Because I'm afraid i did not.

Thanks!

No, you can't downgrade from 4552 without a pre-4552 dump of your kernel.

Caster.

[gir]

Thanks, Caster.

Really dig your sticky-looking avatar, btw.