Privacy-preserving cross-user source-based data deduplication in cloud storage

Encrypted Data Deduplication in Cloud Storage

“…Many data deduplication mechanisms have been proposed recently [5], [6], [7], [8], [9], [10], [11], [12], [13], [14]. In this section, we research into the encrypted data deduplication and discuss some security issues.…”

Differentially private client‐side data deduplication protocol for cloud storage services

“…Lee et al , observed that the probability of Harnik et al . scheme that information of the existence of a file is leaked to the adversary is not negligible in security parameter d .…”

“…Harnik et al . scheme and its security‐enhanced version obfuscate the occurrence of deduplication by randomizing the event with certain probability. This randomized approach, however, causes huge network bandwidth consumption owing to the unnecessary file upload.…”

“…This leads to our new attack, denoted by related‐files attack , that we propose in this paper. Security of these approaches are weakened by related‐files attack in which an adversary can take advantage of knowledge of correlations among files. Olivier et al .…”

“…The contributions of this paper are as follows. First, we discuss the security weakness of the previous schemes that are based on the randomized approach. Second, we propose a storage gateway‐based solution that guarantees robust security, while providing network efficiency and flexibility.…”