A Survey of Public Auditing for Shared Data Storage with User Revocation in Cloud Computing

Cloud computing technology has matured, so cloud computing produces a wide range of cloud service. Cloud storage services are one of cloud services where cloud service provider can provide storage space to customers. Because cloud storage services bring a lot of convenience, many enterprises and users store the data to the cloud storage. However, the user will outsource data to the cloud storage service, but the user is difficult to manage remote data in the cloud. Therefore, how users verify data integrity is a major challenge. In recent years, public audit is used to verify data integrity by which the user allows other to verify the user’s data. Because the feature of cloud service allows users to communicate with each other on the cloud platform, the cloud storage service allows the data owner to share their data to other users. Therefore, public auditing extends to the share data, so the original operation becomes not the same including signature, public audits, dynamic data and user revocation which generates on the situation of shared data. In the paper, we define the requirements of public auditing with shared data and explain four representative approaches which include analysis function, security, and performance requirements. Finally, we provide some topics for future research.