ASSURED DELETION OF INCREMENTAL BACKUPS IN A CLOUD BACKUP SYSTEM

Abstract

Assured deletion of incremental backup copies in cloud backup system is presented. The proposed method allows both the deduplication-based incremental backup mechanism and the assured deletion method to seamlessly work together. The cloud backup system provides means of assured backup deletion from particular backup versions in a way that will not affect other working backup versions. This functionality is achieved by using the layered encryption method by introducing different symmetric encryption keys for files and their corresponding versions.