Supporting dynamic update scheme for assured deletion based-multicopy association tree

Abstract

Cloud storage services provide storage resources for resource-constrained users, which reduces their local overhead and computing cost. As an extension of cloud computing, fog computing introduces a fog layer between the cloud and users to deploy computing, storage, and other types of equipment, allowing users to operate outsourced data conveniently. Although cloud storage brings many conveniences to users, assured data deletion is still one of the crucial security challenges. This paper proposes an efficient and secure cloud data deletion scheme (SDUS-AD) that supports dynamic data updates in multi-copy scenarios. In this scheme, a new dynamic structure called Multi-Copy Association Tree is designed to realize the dynamic update of outsourced data efficiently and safely. A cloud-fog-user layer structure is used to meet the needs of resource-constrained users to update data and ensure the confidentiality of data privacy. Detailed performance analysis and simulation experiments show that SDUS-AD is efficient, safe, and feasible.

Tasks

Reproductions