Efficient data integrity auditing with corrupted data recovery for edge computing in enterprise multimedia security

Enterprise multimedia can provide various services for enterprises and staffs, such as minutes of the meeting, staff training and internal news release. The format of enterprise multimedia data includes images, videos, documents, etc. The diversity and complexity of the multimedia data content increase the difficulty of storage and processing of the data. Using the nearest edge nodes to store and process the enterprise multimedia data can reduce the investment of the local storage hardware, and improve the utilization rate of peripheral dispersing devices. However, edge nodes are not fully trusted. The lack of service managers in edge computing determines that the stored enterprise multimedia data suffers from many security threats. To guarantee the security of the multimedia data in enterprises, an efficient data integrity auditing scheme is proposed for edge computing in this paper that can be used in enterprise multimedia security. Note that the technology of the homomorphic authenticator is used to construct the proposed scheme, which determines that our scheme can provide data integrity auditing with high efficiency. To reduce the financial loss caused by data corrupted for enterprise, the enterprise multimedia data are backed up in the remote cloud. Moreover, the data storage structure of One-way Linked Information Table (OLIT) is used to store the history multimedia data for enterprise, which provides high efficiency of the data recovery. In security analysis, the correctness proof is provided, and the data update auditing and the replay attack resistance are also analyzed. Performance analysis shows that our scheme has low computational cost that can be employed in the practical enterprise multimedia security.