Restricting access to server to iPhone app

Question

I\'m building a client/server iPhone game, where I would like to keep third-party clients from accessing the server. This is for two reasons: first, my revenue model is to s

Answer 1

Have your game users authenticate with their account through OAuth, to authorize them to make game state changes on your server.

If you can't manage to authenticate users, you'd need to authenticate your game application instance somehow. Having authentication credentials embedded in the binary would be a bad idea as application piracy is prevalent and would render your method highly insecure. My SO question on how to limit Apple iPhone application piracy might be of use to you in other ways.