Cloud Deduplication based on Multiple Group Signature Scheme

Abstract

Increasing the volume of redundant data by multiple clients in cloud storage becomes a vital challenge. Multiple group setting schemes have recently become important for enabling deduplication for a cloud server. We construct multiple-groups’ schemes that allow one or more groups to subsequently upload or edit a file such that the cloud server can avoid duplicate according to the ownership of users. We use the Message Lock Encryption (MLE) as an ingredient for deduplication both for uploading a new file and for updating an existing file. Furthermore, group signature features are adding for the multiple- group setting, mainly the group managers manage new entities and the revocation list for the client and the server respectively. In this paper, we construct two sub-protocol that provided the security of MLE. Hence, security of the message holds under the computational assumptions on the message distribution produced by the attacker.