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The solution to this is to give each copy a cryptographic key which you then verify with the server. Unfortunately this isn't possible for iPhone games.

• teamonkey 16y ago
  Until the cracked version appears, that is.
  • naz 16y ago
    But that's the point, the server can simply refuse to serve someone without a valid key.
    • robryan 16y ago
      Doesn't that go back to the roots of a lot of computer software privacy, keygens?