A Reliable and Secure Cloud Storage Schema Using Multiple Service Providers
Haiping Xu, Deepti Bhalerao · Proceedings/Proceedings of the ... International Conference on Software Engineering and Knowledge Engineering · 2015
Despite the many advantages provided by cloud-based storage services, there are still major concerns such as security, reliability and confidentiality of data stored in the cloud.In this paper, we propose a reliable and secure cloud storage schema using multiple service providers.Different from existing approaches to achieving data reliability using redundancy at the server side, we propose a reliable and secure cloud storage schema that can be implemented at the client side.In our approach, we view multiple cloud-based storage services as virtual independent disks for storing redundant data encoded using erasure codes.Since each independent cloud service provider has no access to a user's complete data, the data stored in the cloud would not be easily compromised.Furthermore, the failure or disconnection of a service provider will not result in the loss of a user's data as the missing data pieces can be readily recovered.To demonstrate the feasibility of our approach, we developed a prototype cloud-based storage system that breaks a data file into multiple data pieces, generates an optimal number of checksum pieces, and uploads them into multiple cloud storages.Upon the failure of a cloud storage service, the application can quickly restore the original data file from the available pieces of data.The experimental results show that our approach is not only secure and fault-tolerant, but also very efficient due to concurrent data processing.