Design And Implementation Of File Multi-cloud Storage System Based On Android

With the rapid development of cloud computing and cloud storage,the widespread popularity of mobile devices.Cloud storage technology effectively used on mobile devices has become a research hotspot.Combining mobile terminals with cloud storage technology can solve the problems of low processing capacity and insufficient storage capacity of the mobile terminals,but there are also many security risks,such as data leakage,data loss,and the data cannot be accessed due to cloud service shutdown.Storing data in a single cloud storage server can not meet current users' needs for data security.In order to ensure the data security of enterprises and individuals stored in cloud servers,it is urgent to use current cloud servers to build a more secure multi-cloud storage system.This thesis concisely introduces the relevant theoretical knowledge of mobile cloud storage technology,data encryption technology,and integrity verification technology.The system applies RS erasure coding / decoding that realized by calling a dynamic link library,data encryption technology,and integrity verification technology to ensure the security and availability of data.Cloud services in this thesis include Alibaba cloud,Huawei cloud,Baidu cloud,Tencent cloud,and Tianyi cloud,which is widely used and reliable in the current market.This thesis designs a file multi-cloud storage system based on Android,it uses RS erasure code technology to block and encode data,and uses data encryption technology to encrypt encoded data.Then we store the encrypted data in multiple cloud storage servers to ensure the confidentiality of the data and recoverability when the data is damaged.It realizes the functions of user login,user registration,personal information settings,user management,cloud service management,cloud service bucket management,and RS multi-cloud storage management.The application of this system solves the insufficiency of mobile device storage capacity and low-security performance,which effectively guarantees the security and confidentiality of personal and enterprise file storage.