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ddrecovery
 Post subject: Is Each WD Oxford Encryption Unique
PostPosted: November 9th, 2015, 14:37 
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Or is it possible to use a matching USB Bridge board to decrypt the data? PC-3000 will not see this type of encryption.

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data-medics
 Post subject: Re: Is Each WD Oxford Encryption Unique
PostPosted: November 9th, 2015, 15:04 
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Each drive has a unique key, but it's not stored on the bridge at all I don't think. I believe it's stored in the SA and usually in a key sector within the HPA.

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lcoughey
 Post subject: Re: Is Each WD Oxford Encryption Unique
PostPosted: November 9th, 2015, 15:08 
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data-medics wrote:
Each drive has a unique key, but it's not stored on the bridge at all I don't think. I believe it's stored in the SA and usually in a key sector within the HPA.

Actually, I do believe that some Oxford based controllers store the unique key on the bridge, making recovery without the original bridge much more complex.

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ddrecovery
 Post subject: Re: Is Each WD Oxford Encryption Unique
PostPosted: November 9th, 2015, 15:22 
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lcoughey wrote:
Actually, I do believe that some Oxford based controllers store the unique key on the bridge, making recovery without the original bridge much more complex.

This is what I understand. Looks like a little hacking is in order although not sure how successful it will be. For anyone that has not seen this paper, here is some information on WD Encryption.


Attachments:
1002.pdf [1.5 MiB]
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einstein9
 Post subject: Re: Is Each WD Oxford Encryption Unique
PostPosted: November 10th, 2015, 4:48 
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lcoughey wrote:
data-medics wrote:
Each drive has a unique key, but it's not stored on the bridge at all I don't think. I believe it's stored in the SA and usually in a key sector within the HPA.

Actually, I do believe that some Oxford based controllers store the unique key on the bridge, making recovery without the original bridge much more complex.


+100

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northwind
 Post subject: Re: Is Each WD Oxford Encryption Unique
PostPosted: November 10th, 2015, 6:11 
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There are several variants of Oxford bridge encryption. Some store the key on the bridge, some not.
In any case, recovery is possible, even when original bridge is missing.

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ddrecovery
 Post subject: Re: Is Each WD Oxford Encryption Unique
PostPosted: November 10th, 2015, 13:36 
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northwind wrote:
There are several variants of Oxford bridge encryption. Some store the key on the bridge, some not.
In any case, recovery is possible, even when original bridge is missing.

Any pointers? I see that the Oxford chip leaks the key to RAM when you enter in a new key. Any ideas how to get to this?

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ddrecovery
 Post subject: Re: Is Each WD Oxford Encryption Unique
PostPosted: November 10th, 2015, 13:53 
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Forgot to say, I am working with a clone of the original drive after head failure, so I presume the key will not be uploaded into the RAM. I basically need to decrypt the drive on the fly externally.

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northwind
 Post subject: Re: Is Each WD Oxford Encryption Unique
PostPosted: November 11th, 2015, 4:40 
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Did you look for Oxford encryption key at the end of the drive?
If there is no such key and you're sure you've read this part of the drive without errors, then it encrypts using the bridge.
If you don't have the original bridge, then recovery is still possible, but more complex.

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Amarbir[CDR-Labs]
 Post subject: Re: Is Each WD Oxford Encryption Unique
PostPosted: November 12th, 2015, 14:08 
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ddrecovery wrote:
Forgot to say, I am working with a clone of the original drive after head failure, so I presume the key will not be uploaded into the RAM. I basically need to decrypt the drive on the fly externally.


Sir ,
Why Not Put The Original PCB And Clone Patient Using USB Interface Only .Possible Sometimes [ plus encryption will not be a issue ] .

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ddrecovery
 Post subject: Re: Is Each WD Oxford Encryption Unique
PostPosted: November 12th, 2015, 14:10 
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Amarbir wrote:
Sir ,
Why Not Put The Original PCB And Clone Patient Using USB Interface Only .Possible Sometimes [ plus encryption will not be a issue ] .

The original PCB has been lost.

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Amarbir[CDR-Labs]
 Post subject: Re: Is Each WD Oxford Encryption Unique
PostPosted: November 13th, 2015, 0:33 
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ddrecovery wrote:
Amarbir wrote:
Sir ,
Why Not Put The Original PCB And Clone Patient Using USB Interface Only .Possible Sometimes [ plus encryption will not be a issue ] .

The original PCB has been lost.


:mrgreen: ,
Lol it Ran Off [ Its So Scared Of You ] . :D .Anyway Keep Us Posted On Developments And Have a Great Day Today

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digisupport
 Post subject: Re: Is Each WD Oxford Encryption Unique
PostPosted: November 13th, 2015, 3:14 
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Its funny how clients lose Oxford bridges, then they get 2 prices for recovery.
One without native bride and one with - suddenly the bridge is not so lost any more :wink:

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pcimage
 Post subject: Re: Is Each WD Oxford Encryption Unique
PostPosted: November 13th, 2015, 3:23 
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digisupport wrote:
Its funny how clients lose Oxford bridges, then they get 2 prices for recovery.
One without native bride and one with - suddenly the bridge is not so lost any more :wink:


Same with original PCB for hard drives, they strenuously deny that it's been changed until told it will cost a lot more if they can't produce the original PCB. Then miraculously they suddenly remember that their "PC expert friend" may have changed it and they still have it!

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Amarbir[CDR-Labs]
 Post subject: Re: Is Each WD Oxford Encryption Unique
PostPosted: November 13th, 2015, 7:37 
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pcimage wrote:
digisupport wrote:
Its funny how clients lose Oxford bridges, then they get 2 prices for recovery.
One without native bride and one with - suddenly the bridge is not so lost any more :wink:


Same with original PCB for hard drives, they strenuously deny that it's been changed until told it will cost a lot more if they can't produce the original PCB. Then miraculously they suddenly remember that their "PC expert friend" may have changed it and they still have it!


Haa Haa ,
Thats Great To Here Same Here BTW Lol .

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