Cooperative Provable Data Possession for Integrity Verification in Multi-Cloud Storage

Provable data possessions is a technique for certifying the reliability of data in storage subcontracting. This project we address the structure of an competent PDP system for circulated cloud storage to support the scalability of service and data migration, in which we consider the existence of multiple cloud service providers to supportively store and maintain the clients' data. We exsistant a Cooperative PDP system based on holomorphic provable response and hash index hierarchy. We prove the refuge of our system based on multi-prover zero-knowledge proof system, which can satisfy completeness, knowledge soundness, and zero-knowledge properties. In addition, we expressive performance optimization mechanisms for our system, and in particular exsistant an efficient system for choosing optimal parameter values to minimize the computation costs of clients and storage service providers. Our experiments show that our solution introduces lower computation and communication costs in comparison with non-cooperative approaches.