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[Twitter] Asus Transformer Secure Boot Key!!!!

post #1 of 12
Thread Starter 
Quote:
The inner workings of Secure Boot key and Nvflash
What is Secure Boot Key and how does it work?
I’ve been getting lots of questions about this, so here is some simple background:

The secure boot key is an AES128 encryption key that can used to encrypt various data on the flash memory. It’s a generic nvidia tegra2 thing, that the manufacturer can optionally use to make their device more “secure”.

When the SBK is set, it’s stored in a one-time-programmable “fuse”. This also means that now that the key is out, they can’t change it on already released devices, only new devices.

When the tegra2 starts up, the AES key is available to the hardware AES engine only. E.g. not even the bootloader can read it back! However, the bootloader can *use* the key to encrypt whatever data it wants through the hardware AES engine. And here is the explanation why the blob flashing method actually works! The bootloader checks for the blob in the staging partition and encrypts and flashes it as needed.
http://www.xda-developers.com/android/transformer-security-key-found/
https://twitter.com/#!/DroidRay/status/78471110118735872
http://androidroot.mobi/tf-secure-boot-key/

Full Unlocked and Unbricking TF-101!!!!!!
Edited by mickmania - 6/8/11 at 3:17pm
    
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post #2 of 12
Nice, but seriously.. why are all these hardware manufactures locking new devices.. its really lame. plus XDA/ hacking your phone/ device was ruled legal by the supreme court system.
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post #3 of 12
Thread Starter 
Asus have been good with device hacking. The device is very open, unlike Motorola. But getting this key pretty much opened the platform completely. Now noobs can root the phone without following complicated tutorials, instead they just flash modded firmware same manner as official asus firmware. Best Part about this is unbricking the device.
    
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post #4 of 12
This is relevant to my interests. ninja.gif

EDIT: 1337'th POST!
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post #5 of 12
Quote:
Originally Posted by Killam0n;13801615 
Nice, but seriously.. why are all these hardware manufactures locking new devices.. its really lame. plus XDA/ hacking your phone/ device was ruled legal by the supreme court system.

It was ruled legal, but that doesn't mean the developers are going to stop bothering securing it. They want their hardware and software to run a certain way, and they are going to try and lock it. It affects who they do business with and how it makes them and their partner's money, so there is good reason for it. Not everyone makes money on the individual hardware, a big portion of profits come from the software, so if you want the hardware prices to stay where they are at, then it makes sense that manufacturers are going to lock their hardware...otherwise the cost of licencing the software is going to raise the hardware prices.

If you find a way past it, good for you, but if not, thats within their rights just as well. You buy the product with that knowledge.
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post #6 of 12
Making it difficult to do what you want opens a market for commercial unlocks, and it's also probably a requirement from some cell providers.
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post #7 of 12
Quote:
Originally Posted by mickmania;13801707 
Asus have been good with device hacking. The device is very open, unlike Motorola. But getting this key pretty much opened the platform completely. Now noobs can root the phone without following complicated tutorials, instead they just flash modded firmware same manner as official asus firmware. Best Part about this is unbricking the device.

Droid was open fully

Xoom is equally loose.

The crudd blur enabled phones, not as much
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post #8 of 12
Quote:
Originally Posted by reflex99;13801977 
Droid was open fully

Xoom is equally loose.

The crudd blur enabled phones, not as much

Hopefully the 2nd-init exploit in the Atrix will work well. XDA has come extremely close to bypassing the bootloader with the help of the Defy devs.
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post #9 of 12
ITS GAME TIME!!!! biggrin.gif:D


This is good news. Very good news.
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post #10 of 12
Thread Starter 
Quote:
Originally Posted by reflex99;13801977 
Droid was open fully

Xoom is equally loose.

The crudd blur enabled phones, not as much

Yeah Droid X, Droid 2 Global are locked. You cannot access the kernel and locked bootloader.
    
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