A position aware Merkle tree for dynamic cloud data integrity verification

In the cloud storage framework, once clients remotely store their data on cloud storage providers, they will lose the physical control over their outsourced data. The risk of unauthorized access to the data increases dramatically. One of the most serious problems in cloud storage is to ensure the correctness of the outsourced data. Specifically, we need to protect these data from unauthorized operations; we also need to detect and recover users' data after unexpected changes. In this paper, we p