The Research On Privacy Data Encryption Of Mobile Phone Based On Android System

The application of Android smartphones is increasingly diversifying,making user store more privacy data on the phone.As the privacy data stored in the form of plaintext,and the lack of sound data protection mechanism,resulting in privacy data easily leaked.Therefore,the paper is committed to the Android system of privacy data encryption research.Based on the analysis of the Android system and its privacy data storage,this paper finds out the centralized unit of the SQLite database and the SD card as the private data storage,and studies the advantages and disadvantages of the encryption and decryption technology from the aspects of encryption algorithm,method and mode.Design an encryption scheme for Android phones which is limited resources.This paper uses an encryption method to protect the privacy data in SQLite database.First,implement the system bottom encryption and decryption interface function,and then in the SQLiteDatabase class constructor function call the interface function,to achieve data encryption and decryption function.On the other hand,the paper also uses an encryption method for SD card privacy protection,the way needs to write a data encryption and decryption function,open for application,and provides user with encryption button,if you need to encrypt encryption function call the function.Based on the data encryption protection,this paper designs a key protection and an unencrypted data protection scheme for SD card.The details are as follows:1.A 3-DES encryption algorithm is combined with the input error penalty mechanism to design a key protection scheme to prevent bursting.2.In this paper,according to the phenomenon of operating unencrypted data of SD card by malicious software,a secret word authentication scheme for unencrypted data in the SD card is designed,and the system needs to verify whether the password is matched before the SD card data is encrypted.The matching is stored in the SQLite Database,making the security of the SD card and high-performance SQLite database associated with each other,SD card privacy data more secure.Through the test,the paper proposed SQLite database and SD card encryption program have been achieved.Privacy data protection stored in the SQLite database and SD card is very effective,but the SD card performance is reduced by 50%,the late SD card encryption will be more in-depth study.