On Mar 29, 2011, at 13:03, Todd Heberlein wrote:

> I thought my Mac Cocoa program was pretty much done, and that all I needed to 
> do was check off a box in Xcode's packaging or Apple's iTunes Connect web 
> site saying "I want copy protection".

FWIW, my understanding of the reason it doesn't work that way is this:

A standard implementation of the receipt checking code could would permit a 
single hacking tool to hack away the protection from *every* Mac App Store 
download. If you implement this yourself, a hacker has to target your 
application specifically. Chances are, that won't be worth any hacker's time 
unless your app is incredibly successful.

As a consequence, once you have your code working, you should probably try to 
rearrange it a bit (reorder functions, obfuscate names, etc) to make it less 
like the sample code you're following along with, so that it's slightly more 
work for a hacker to crack your application. A hacker who have to spend a 
couple of hours at it, rather than a couple of minutes, might just not bother, 
and move on to some other unfortunate target.

As I said, FWIW.



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