Explore Windows Store app security testing in this comprehensive 47-minute conference talk from AppSecEU 2014. Delve into the architecture and theory of Store apps, comparing them to traditional Windows applications and websites. Learn how to set up a testing environment using Windows 8.1, web proxies, and Visual Studio. Discover techniques for accessing and testing Store apps, including code review examples focusing on secure and insecure JavaScript. Examine the use of web services in apps and potential security vulnerabilities in the app sandbox. Gain insights into the future of Windows app development and its security implications. This presentation provides a valuable introduction to an emerging area of application testing that is becoming increasingly critical as the Store system matures.