Research And Implementation Of Privacy Protection Technology In Android Platform

In the age of information explosion,the mobile Internet is growing rapidly and the number of users using mobile intelligent terminals is also on rise.Mobile phones are becoming more and more intelligent,and their functions are becoming more and more diverse.They have become an indispensable part of people's lives.Smart phones play an important role in people's communication,information sharing and mutual cooperation,especially the popularization of 4G mobile communication technology and the continuous maturity of 5G mobile communication technology,and the desire to allow people to use mass information anytime and anywhere is going to be a reality.It has greatly enriched the application of smart phones and made higher demands on the security of smart phones.Among them,Android is the majority of smart phones with operating systems,which makes it become the main target of the malicious software attacks.Although the Android system also has a security mechanism,its security mechanism is a coarse-grained permissions control mechanism and also a fragile protection mechanism.Therefore,aiming at the shortcomings of Android system's privilege control,it is of great practical significance to improve the security of Android phones and protect the security of users' information.In this paper,the security mechanism of Android system is analyzed,and the related technology of authority control is emphatically studied.In view of the security of the Android system for the application control level,the coarse-grained security mechanism is adopted,which is the user's own responsibility management mechanism.We have analyzed and studied it.The paper designs and implements a new privacy protection system based on Android.This system is improved the protection of users' privacy information by the perspective of authority control.And the control of privacy rights is realized mainly from two aspects.Firstly,the privacy protection system achieves the restriction of user information extraction;secondly,privacy-related rights are analyzed and intercepted,so as to improve the security of Android system,and protect users' privacy information from being divulged or stolen.Compared with the traditional privilege management system,the privacy protection system designed in this paper,which is designed to extract user privacy data from the perspective of protecting users' privacy information.That is,when an application is installed by an application,according to their own needs,users can block access to key root privileges based on their own needs.It prevents the application from accessing the user's privacy information.On the other hand,when the application wants to extract the user's private information,the system also performs an interception operation on the unauthorized or over-privileged access to the private information,and alerts the user to decide whether to grant the application permission.Thereby increasing the security of Android system permissions control.At the same time,it can also improve the accuracy of privacy-related rights control and reduce the probability of the system being attacked by malicious programs.Finally,the system is tested,and the test results show that the system can achieve the desired effect and realize the effective protection of the user's privacy information.