A Secure Cloud Backup System with Deduplication and Assured Deletion

摘要

Cloud backup has been widely used in recent years. Over time, if the stored content is not under control, there will be a lot of redundant data stored in the cloud. When a user issues a delete instruction, the cloud service provider may not actually destroy the data, so that the user's data is exposed to the risk of being compromised. In order to avoid storing duplicate data and prevent deleted data from being recovered, we design a cloud backup system that can solve the two problems. No matter how large the files, each client only keeps one key. Through the experimental evaluation, we verify that our scheme is valid and our local overhead is greatly saved.