Research And Implementation Of Data Security Protection Technology For Android Terminal

With the rapid development of mobile Internet and Android operating system,mobile smart devices such as mobile phones have become an indispensable part of everyone's life.People are experiencing the convenience brought by the era of mobile intelligence,and the security of users' own data is also faced with threats.Mobile terminal users store a large amount of private data on the device,and malware can easily steal local data only by obtaining relevant permissions.At the same time,people use Android mobile to share images and digital communication scenes more and more.Users can take pictures and share them on social platforms anytime and anywhere,which makes the protection of copyright information of pictures more and more Important,if not protected,it is likely to harm personal interests.Therefore,the problem of copyright authentication based on Android mobile intelligent terminal and copyright authentication of picture information needs to be solved urgently.Based on this,this paper designs and implements a new lightweight mobile intelligent terminal data security protection technology based on Android's original security mechanism,and conducts in-depth research on identity authentication,encryption technology and digital watermarking.Realize the security protection of the user's common personal pri vacy data and the deposit and identification of the copyright information of the picture,effectively reducing the risk of theft of personal data.The scheme protects data from three aspects:access control module,security space module and watermark camera module.The main contents of the thesis are as follows:(1)According to the problems of Android mobile terminal data information protection,based on Android architecture and security mechanism,the Android mobile terminal data security protection technology scheme model is designed,from user identity authentication and authorization,common local data information protection and picture copyright.The three aspects of information identification and identification are studied and elaborated separately.(2)Based on the method of encrypting,storing,extracting and destroying pictures,audio and video and files of Android mobile terminal,the secure space module based on the above private data is designed.The new encryption algorithm based on chaotic sequence-AES is applied to Android.The platform encrypts and stores data to ensure data security.(3)Study digital watermarking technology,analyze the characteristics,classification and common digital watermarking algorithms of digital watermarking,and focus on the analysis of discrete cosine transform(DCT)digital watermarking technology applied in this scheme.In this paper,The digital watermarking algorithm based on DCT transform domain combines the mobile phone IMEI number,mobile phone number,time,and the integrated watermark information composed of real-time geolocation information acquired by the Baidu map SDK related interface,and embeds it into the picture to realize the copyright of the picture.protection.Through the research on Android mobile terminal data security protection technology,this paper realizes a lightweight mobile platform security protection system for personal privacy data protection and image copyright authentication.Tests show that the system has a good audience level in terms of practicability and value,has a good performance experience,and protects users' data security to a certain extent.