Design And Implementation Of Privacy Data Protection System Based On Android Mobile Terminal

Today,with the rapid development of smart phones,people are more and more dependent on mobile phones,which naturally leads to a large number of private data stored in mobile phones,including videos,files,pictures,even contacts and call records.Due to the incomprehensibility of mobile phone system and related software protection,there are great hidden dangers in users' privacy data.Based on this scenario,this application system is designed and developed to help users solve this problem.Based on the research of Android technology,this paper uses MVC as the framework to design and realize the acquisition and display of privacy data in the main interface.From the perspective of privacy data security,this paper designs the permutation algorithm of privacy data based on pseudo-random number sequence.Combined with the research of AES encryption algorithm and NDK development technology,it realizes the encryption algorithm framework based on pseudo-random number sequence.In addition,based on the importance of key protection of AES encryption algorithm,AES symmetric key is composed of mobile phone unique identification code IMEI number and the correctness of user verification lock screen to generate AES symmetric encryption key.In the form of storage,the RSA asymmetric key is obtained through IPC communication,and then AES symmetric key is encrypted.In view of the demand analysis and detailed design of Android privacy data protection system,this paper abstracts various functional modules,including encryption algorithm secret key storage module,application startup and entry module,data acquisition and display module,data encryption and decryption module and external storage media monitoring module,and implements them in detail.Finally,through the design of test cases,the functions and performance of the application are tested and evaluated in detail.The results show that the privacy data protection system based on Android has high practicability and security,and can effectively protect the user's privacy data security.