Research And Implementation Of Privacy Information Protection System Based On Android Platform

With the constant improvement of Android smart phone market share, Androidsecurity capacity is also facing challenges. Due to the open nature of the basic structureand the source code of Android system and the characteristics of the software for free.Android smart phone commonly have the problem of personal privacy being revealedand malicious absorption of the cost. Although there is a corresponding securitymechanism to protect the security of the system, but not enough to resist malwareattacks. The Android platform security defense system has become one of the focus andhot spot among the field. Based on these, combined with internship program, this topicresearch and implement an Android platform privacy protection system from the angleof fine-grained permissions management, data privacy protection policy and so on. Themain research work of this paper carried out the following:1. This paper put forward a fine-grained permissions management mechanism ofAndroid. The Android platform existing permissions mechanism is a kind ofcoarse-grained mechanism, the user can only manage the permissions duringsoftware installation. If the user refused to apply for software permissions then itwill cancel the installation. Fine-grained permissions management mechanismproposed in this paper can manage the permissions during the installation orrunning of the software. When user need to apply for permission during running ofthe software. System pop-up prompt dialog box for permissions application to tellthe user there is software applying for permission.2. Based on the function design thought of mainstream security software data privacyprotection. This paper improves and put forward a data privacy protection strategyon system level. The strategy prevent the disclosure of user privacy informationeffectively through hidden video temporary files and disguise illicit close contactname and number. On the basis of retaining file encryption and the intimatecontact protection function provide by the mainstream security software. WhenAndroid mobile broadcast encryption video, it will generate temporary filesthough decryption and stored plain text on sdcard, malicious software can stealtemporary files and lead to user privacy disclosure. When illicit close contact ofsecurity software calls, it is easy to expose the personal contact information byshow its true name and number. The existing security software is lack of control forthe two types of problem, privacy data protection strategy proposed in this paper can solve these two kinds of problems better.3. Designed and implemented a privacy protection system based on Android platform,apply fine-grained permissions management mechanism and privacy dataprotection strategy proposed in the paper to the system, adopt the proposedfine-grained permissions management mechanism in the architectural layer,achieve the real-time monitoring of the application of application permissionsthrough permissions management module of system, using the proposed dataprivacy protection policy in the application layer, designed and implemented theencryption module and decryption module of the background and intimate contactmodule to prevent the disclosure of user privacy information. The practice ofinternship project shows that the proposed method is effective and feasible.