Beginning iOS Game Center and Game Kit: For iPhone, iPad, and iPod touch

Preventing Cheating and Preventing Timeout-Related Disconnections

One thing that has not become a big concern on the iOS platform, as of yet, is cheating through network exploits. If you are an online gamer, you are probably all too familiar with this behavior. A clever user will determine how the network behaves, and then send commands that the client itself would never send, such as increase hit points to max float or decrease respawn time to zero. Although you might need to have your server respond to things such as increase or decrease hit points, you want to make sure the server is in control. For example, instead of letting the client say “increase moment speed to fifty,” you should set up the message to something like “request increase ...