Every day, over half a billion iOS users blindly entrust mobile devices with their personal information. If you write an application that mishandles that information, you'll create a goldmine for attackers-and a catastrophe for you and your customers. Whether you develop iOS apps or test their defenses, it's critical that you know how to track down and eliminate security threats before they become real issues.In iOS Application Security, author David Thiel shows you how to write apps that actually protect users from the bad guys. He covers everything you need to know to design secure iOS apps from the ground up, including:A whirlwind tour of iOS application structure and Objective-C design patterns A glimpse into the iOS security model and the limits of its built-in protectionsThe myriad ways that sensitive data can leak into places it shouldn't beLegacy flaws from C that still cause problems in modern iOS applicationsImplementing encryption with the Keychain, the Data Protection API, and Common CryptoiOS Application Security reveals not only the sort of coding mistakes that developers and security professionals encounter when writing and testing apps but also how to fix them. Complete with coverage of the upcoming iOS 8, Thiel pulls otherwise fragmented information about industry best practices into this essential guide to secure app development.