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JonS  
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 More options Nov 11 2012, 3:13 am
From: JonS <thejunk...@gmail.com>
Date: Sun, 11 Nov 2012 00:13:14 -0800 (PST)
Local: Sun, Nov 11 2012 3:13 am
Subject: Device Specific Key

Hi,

I am currently writing security software that requires me to scan APKs on
the Android device.  Unfortunately, in the latest release of Android
(JellyBean), I noticed that there is a new security feature that Google is
adding that will encrypt "paid" apps with a "device-specific key" so that
the apps cannot be transferred to other devices. On install, the APKs will
be decrypted.

I've tried looking all over the web, but I can't find any information
regarding how this is implemented or how this works.  Can someone point me
to more information on this? such as white-papers, regions of the AOSP
source code, blogs, etc.  Any information will be extremely helpful.
 Thanks!

J


 
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KaPiL.rIcKy  
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 More options Nov 12 2012, 12:45 pm
From: "KaPiL.rIcKy" <kapil.ri...@gmail.com>
Date: Mon, 12 Nov 2012 23:14:03 +0530
Local: Mon, Nov 12 2012 12:44 pm
Subject: Re: Device Specific Key

have you search through the Package Manager and related Class ?

--

~~~~~~~~~~~~~~~~~~~~~~~~~~
Thanks and regards
Kapil Kumar
~~~~~~~~~~~~~~~~~~~~~~~~~~


 
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JonS  
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 More options Nov 12 2012, 6:13 pm
From: JonS <thejunk...@gmail.com>
Date: Mon, 12 Nov 2012 15:13:34 -0800 (PST)
Local: Mon, Nov 12 2012 6:13 pm
Subject: Re: Device Specific Key

Thanks Kapil for the suggestion.

I've looked through the Package Manager code and the only thing that I can
find that 'remotely' sounds like it is related to this functionality is the
IPackageManager::installPackageWithVerification code which doesn't seem
correct.

Would you happen to be able to point me to the correct code please?

Thanks,
J


 
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Alexey Eromenko  
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 More options Nov 12 2012, 6:16 pm
From: Alexey Eromenko <al4...@gmail.com>
Date: Tue, 13 Nov 2012 01:15:34 +0200
Local: Mon, Nov 12 2012 6:15 pm
Subject: Re: Device Specific Key
On Tue, Nov 13, 2012 at 1:13 AM, JonS <thejunk...@gmail.com> wrote:
> Thanks Kapil for the suggestion.

> I've looked through the Package Manager code and the only thing that I can
> find that 'remotely' sounds like it is related to this functionality is the
> IPackageManager::installPackageWithVerification code which doesn't seem
> correct.

> Would you happen to be able to point me to the correct code please?

According to this article, DRM is now disabled:
http://www.androidpolice.com/2012/08/08/jelly-bean-app-encryption-bre...

--
-Alexey Eromenko "Technologov"


 
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Kristopher Micinski  
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 More options Nov 12 2012, 6:57 pm
From: Kristopher Micinski <krismicin...@gmail.com>
Date: Mon, 12 Nov 2012 18:57:17 -0500
Local: Mon, Nov 12 2012 6:57 pm
Subject: Re: Device Specific Key
I'm not fresh on the current state of AOSP, but I don't think (I could
be wrong) that this code is include in AOSP proper, perhaps someone
can back me up / prove me wrong.

kris


 
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JonS  
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 More options Nov 12 2012, 7:51 pm
From: JonS <thejunk...@gmail.com>
Date: Mon, 12 Nov 2012 16:51:59 -0800 (PST)
Local: Mon, Nov 12 2012 7:51 pm
Subject: Re: Device Specific Key

Thanks guys for the feedback.

I found this resource :
http://nelenkov.blogspot.com/2012/07/using-app-encryption-in-jelly-be...

and it looks like it is pretty detailed :)

J


 
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Kristopher Micinski  
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 More options Nov 12 2012, 8:12 pm
From: Kristopher Micinski <krismicin...@gmail.com>
Date: Mon, 12 Nov 2012 20:12:06 -0500
Local: Mon, Nov 12 2012 8:12 pm
Subject: Re: Device Specific Key
I'm confused, this link doesn't talk about full app encryption at all,
it just talks about negotiations with the play store using OAuth...?

kris


 
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JonS  
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 More options Nov 13 2012, 12:35 am
From: JonS <thejunk...@gmail.com>
Date: Mon, 12 Nov 2012 21:35:12 -0800 (PST)
Local: Tues, Nov 13 2012 12:35 am
Subject: Re: Device Specific Key

Are you sure?  Maybe I've provided the wrong link, but it should point you
to using the app encryption in JellyBean

"
http://nelenkov.blogspot.com/2012/07/using-app-encryption-in-jelly-be...
"


 
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Kristopher Micinski  
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 More options Nov 13 2012, 2:30 am
From: Kristopher Micinski <krismicin...@gmail.com>
Date: Tue, 13 Nov 2012 02:29:37 -0500
Local: Tues, Nov 13 2012 2:29 am
Subject: Re: Device Specific Key
Ah okay, yes, didn't see it before, it redirected to another page.

kris


 
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