Daniel Amitay, developer of the security software Big Brother for the iPhone 4 or iPod Touch (fourth generation), has found his app removed from the App Store after publishing an article on his blog demonstrating that users often pick easy-to-guess passcodes for the app, drawn from information sent to the developer by the app itself. Apple was concerned that the developer was harvesting in-app passcodes without user knowledge, though Amitay maintains that the data is anonymized.
