Research And Implementation Of Security Protection App Based On Android Mobile Terminal

At present,Android is the most popular in the mobile terminal system.Various applications keep growing,bringing convenience to the user,also causing many security problems at the same time,such as stealing users' privacy,charging maliciously,etc.Therefore,it is important to study the security of Android system.After studying the Android architecture and the Android security mechanism and hidden dangers,this paper designs a security protection App using static detection and dynamic monitoring.The system is mainly composed of three modules,including antivirus module,abnormal monitoring module and alarming module.Antivirus module and anomaly monitoring module are the main modules of the system,used for killing the virus in the Android system application.Antivirus module has two methods of security scanning and real-time scanning,these two approaches are based on a virus database,accessing to the MD5 eigenvalue,permission information and signature information of the APK files,and then using string matching method to query the virus database and the naive bayes algorithm to determine whether it is a virus application.The difference between the two is that the security scanning kills applications installed in the Android system,and real-time scanning kills applications that installing in the Android system by broadcast,through the two ways to maximize the protection of the Android system security.Abnormal monitoring module is mainly to monitor telephone,message and traffic.Telephone and message monitoring need black and white list.Mobile phone numbers joined the blacklist will not receive the phone calls and messages,and the messages out of the blacklist will check whether they contain virus URL.The traffic monitoring starts with setting the threshold,and when the flow of the application exceeds the threshold,the user will be prompted for processing.Alarming module mainly alarms when the SIM card changes,when the phone is lost,you can use the binding safe number send instruction to the lost phone,make its alarm,send the location information,clear data and lock screen.Finally,the functional test and performance test of security protection application are carried out.Functional test is used to detect whether each function achieves the desired effect using virus samples,and performance test mainly test the CPU and memory.The test results have shown that the security protection App implemented in this paper can be well run on Android mobile terminal.