IPOR: An efficient IDA-based proof of retrievability scheme for cloud storage systems

With the arrival of big data era, cloud storage has become more ubiquitous. A growing number of consumers remote their data into cloud, as cloud can provide them with ample storage space and powerful computational capacity. However, storing data in cloud means that data is out of their control. How to verify the integrity of stored data and retrieve the corrupted data has become an urgent security problem. In this paper, we propose a new efficient proof of retrievability scheme, named as IPOR, for cloud storage systems. The IPOR not only can verify the integrity of remote data, but also can retrieve the original data of corrupted blocks from the healthy servers with probability 100%. Moreover, IPOR obviously decreases the complexity of data integrity tags and it requires performing a few multiplication and addition operations to retrieve the corrupted data. Therefore, our scheme is much more efficient than the state-of-the-art schemes. In addition, the security analysis indicates that our scheme is provably secure.