ABSTRACT
Android is an open-source operating system based on Linux, mainly developed by Google company [1]. Since the third quarter of 2013, the market share of the Android platform in China has accounted for 59% [2]. However, with the rapid development of smart phones and the popularity of the Android system, malwares and Trojans use the system function defects or code vulnerabilities to steal private information such as account password and credit card numbers in our devices. The permission-based security mechanism is a fundamental policy to defend such attacks and protect users’ privacy.
