Desigan And Implementation Of File Access Control Management System Based On Android Platform

Nowadays,smartphones store more and more files containing user personal information and important data.Many viruses and malicious apps are targeting this point to move from PC to mobile terminal.The existing file manager has a single function and lacks security considerations for mobile confidential files.It highlights the necessity of developing a file manager that guarantees the privacy of users.This paper focuses on the confidential file management system based on Android and expands and explores confidential file management in horizontal and vertical directions.The mobile terminal confidential file management system implemented in this paper is divided into basic functional part and advanced functional part.The basic functional part includes basic operation function,file sorting and search,resource library,compression decompression and encryption and decryption functions.The advanced function part includes historical operation restoration,remote sharing and confidential file flow management.The historical operation restoration module performs the function of backing off the user's misoperation based on the SQLite database.The remote sharing function is different from the existing remote management function.Instead of managing the mobile phone file through the PC,the shared file is shared by the mobile phone in the same wireless local area network.The confidential file process management is based on the different user's smart phone usage habits.Through the extraction of touch actions and device response features,the SVM algorithm is used to complete the identity authentication,and further combined with the access control list ACL and encryption and decryption algorithms.Process management of confidential documents to address security risks such as loss of mobile phones.The difficulty and innovation of this paper are described as follows.The traditional file manager is functionally expanded in the horizontal direction,such as historical operation restoration,remote sharing function and the flow of confidential files in the vertical direction.The management has carried out in-depth exploration.Firstly,based on the characteristics of user interaction habits,a nonintrusive identity authentication method based on machine learning algorithm is designed,which greatly enhances the probability of securing confidential documents is greatly enhanced.