Cooperative provable data retention for integrity authentication in multi-cloud Storage

Provable data retention (PDR) is a technique which certain the integrity of data in storage outsourcing. In this paper we propose an efficient PDR protocol that prevent attacker in gaining information from multiple cloud storage node. Our technique is for distributed cloud storage and support the scalability of services and data migration. This technique Cooperative store and maintain the client's data on multi cloud storage. To insure the security of our technique we use zero-knowledge proof system, which satisfies zero-knowledge properties, knowledge soundness and completeness. We present a Cooperative PDR (CPDR) protocol based on hash index hierarchy and homomorphic authentication response. In order to optimize the performance of our technique we use a novel technique for selecting optimal parameter values to reduce the storage overhead and computation costs of client for service providers. Our experiment shows that our solution reflects less communication and computation costs in comparison to non- cooperative approaches. Keyword: provable, Data Retention, integrity, scalability, homomorphic, zero knowledge, storage outsourcing, multiple cloud, Cooperative, data Retention.