Encrypted Data Deduplication in Cloud Storage

Cloud storage is a remote storage service, where users can upload and download their data anytime and anywhere. However, it raises issues regarding privacy and data confidentiality because all the data are stored in the cloud storage. This is a subject of concern for users, and it affects their willingness to use cloud storage services. On the other hand, a cloud storage server typically performs a specialized data compression technique (data deduplication) to eliminate duplicate data because the storage space is not infinite. Data deduplication, which makes it possible for data owners to share a copy of the same data, can be performed to reduce the consumption of storage space. Due to the above issues, there is a research on encrypted data deduplication. In this manuscript, we propose an encrypted data deduplication mechanism which makes the cloud storage server be able to eliminate duplicate ciphertexts and improves the privacy protection.