Mobile devices, especially smartphones and tablets from manufacturers Apple and Google, are now present in almost every household. In the corporate world, these devices are also gaining increasing importance and process highly sensitive data. These new usage scenarios, combined with thousands of applications, create new attack vectors and entry points into these devices. This book presents the various attack scenarios and vulnerabilities in the applications used in detail and shows how you can detect these vulnerabilities. Using current operating systems (Android, iOS, and Windows Mobile) as examples, you will gain a comprehensive insight into penetration testing of mobile applications. You will learn about typical penetration testing activities and, after reading, you will be able to examine apps from major manufacturers and assess their security.