摘要：Android operating system is the most popular mobile system in the world. This study makes a detailed analysis of its security mechanism and existing problems. By analyzing the security architecture of Android operating system, exploited loopholes are pointed out. It also points out hidden security dangers which can be used by hackers. This study introduces the malicious behavior detection method and emphatically introduces the detection method based on behaviors. Due to the disadvantages of the detection method based on behaviors, the detection method is concluded which reduces the rate of false positives. By putting forward an improved attack tree algorithm, a more rigorous theory system has been formed.
