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Blizzard



Joined: 30 Apr 2017
Posts: 39


PostPosted: Fri Jul 21, 2017 20:28    Post subject: Sandisk 20-99-00128-3 Encrypted
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I have a Sandisk 2GB with controller 20-99-00128-3 and was wondering if anyone has decrypted one of these? Is it safe to assume that the key is unique for each device and it would be a waste of time to move the NAND to a donor device?
NAND: SDTNLLAHSM-2048
Сергей



Joined: 26 Aug 2005
Posts: 16538

Flash-Extractor developer

PostPosted: Sat Jul 22, 2017 10:06    Post subject:
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Once i recover data with moving NAND to donor drive

But not sure that it was same controller name
pcimage



Joined: 03 Mar 2008
Posts: 1590
Location: UK

PostPosted: Sun Jul 23, 2017 22:11    Post subject:
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I have recovered several Sandisk devices by switching the NAND onto a working device with same controller name.

This only works with dead devices of course, not ones with degraded memory.
Blizzard



Joined: 30 Apr 2017
Posts: 39


PostPosted: Sun Jul 23, 2017 23:47    Post subject:
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pcimage wrote:
I have recovered several Sandisk devices by switching the NAND onto a working device with same controller name.

This only works with dead devices of course, not ones with degraded memory.


Thank you, I have a good collection of donors and have done this too, many times, but in this case it is a controller that is known to use encryption and I believe the key might be per controller. Was curious if anyone has had success with a swap or with decryption for this controller.
I did just find this post which seems to confirm that the key is in the controller.
HDDRCVR



Joined: 29 Sep 2015
Posts: 353


PostPosted: Tue Jul 25, 2017 20:36    Post subject:
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what are the symptoms that the controller is dead?
Blizzard



Joined: 30 Apr 2017
Posts: 39


PostPosted: Tue Jul 25, 2017 20:57    Post subject:
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HDDRCVR wrote:
what are the symptoms that the controller is dead?
LED flickers 1 time. 2 caps and 2 resistors were blown when I got it. They were replaced with components from a working same device. 24MHz Oscillator was verified. No short to ground now.
HDDRCVR



Joined: 29 Sep 2015
Posts: 353


PostPosted: Tue Jul 25, 2017 23:11    Post subject:
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I don't know if it will apply in your case since it flickers once, but I just wrapped up my second NAND swap on these for the day. 00136-3 and 00162-2 both fully recovered after NAND+controller swap to donor boards. In my case, they had no signs of life, tested oscillators and good connectors.
HaQue



Joined: 16 Feb 2013
Posts: 427
Location: Adelaide, Australia

PostPosted: Wed Jul 26, 2017 6:05    Post subject:
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So you swapped both NAND and controller to other boards? Interesting. It would be good to know if swapping only the NAND would work to another board where everything else is the same.. to see if encryption is a unique or same key.
HDDRCVR



Joined: 29 Sep 2015
Posts: 353


PostPosted: Thu Jul 27, 2017 7:27    Post subject:
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HaQue wrote:
So you swapped both NAND and controller to other boards? Interesting. It would be good to know if swapping only the NAND would work to another board where everything else is the same.. to see if encryption is a unique or same key.

I swap just NAND if I have a donor of the same capacity. Only cases I had issues with were from Titanium Sandisks with big size controllers and those that have proprietary NAND chips with Sandisk grid pattern.
HDDRCVR



Joined: 29 Sep 2015
Posts: 353


PostPosted: Thu Jul 27, 2017 7:29    Post subject:
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HaQue wrote:
to see if encryption is a unique or same key.
it's not unique, done it many times.
HaQue



Joined: 16 Feb 2013
Posts: 427
Location: Adelaide, Australia

PostPosted: Thu Jul 27, 2017 10:03    Post subject:
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Or Key is on NAND.. as there is a strange looking HEX string at the start of these dumps..
Thanks Guys, very useful info
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