Collaborative Integrity Verification in Hybrid Clouds
A hybrid cloud is a cloud computing environment in which an organization provides and manages some internal resources and the others provided externally. However, this new environment could bring irretrievable losses to the clients due to lack of integrity verification mechanism for distributed data outsourcing. In this paper, the authors address the construction of a collaborative integrity verification mechanism in hybrid clouds to support the scalable service and data migration, in which they consider the existence of multiple cloud service providers to collaboratively store and maintain the clients' data. They propose a collaborative provable data possession scheme adopting the techniques of homomorphic verifiable responses and hash index hierarchy.