On Monday, January 14, 2013 7:05:37 PM UTC-7, Nikolay Elenkov wrote:
 

> This is not particularly reliable: if I repackage your app, I can 
> change whatever 
> 'internal' values you have. 


Perhaps I'm wrong, but a cracker shouldn't be able to modify the code and 
re-sign it with our signature.  If that is possible it defeats the whole 
purpose of digital signatures, right?
 

> Additionally, some tools will patch stuff 
> in dalivk-cache 
>

I'm not sure I understand what you mean.  Are you saying at runtime they 
can patch it with a special loader?  If so, sure.  However, I doubt this 
would lead to widespread piracy.
 

> without ever touching your apk. And, of course, it can be pirated without 
> being 
> repackaged. 
>

We are also using Google's LVL so I don't see how the app is going to be 
pirated without modification and repackaging.
 

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