Mobile phones are one of the essential parts of modern life. Making a phone call is not the main purpose of a smart phone anymore, but merely one of many other features. Online social networking, chatting, short messaging, web browsing, navigating, and photography are some of the other features users enjoy in modern smartphones, most of which are provided by mobile apps.

However, with this advancement, many security vulnerabilities have opened up in these devices. Malicious apps are a major threat for modern smartphones. Protecting everyday users of mobile devices from the attacks of technologically competent hackers, illegitimate users, trolls, and eavesdroppers is a complex task. 

We have developed techniques for identifying a smartphone application's intentions, ensuring that the application only does what is expected, and identifying requests for abilities that are not required for the application's purpose.