A key-sharing based secure deduplication scheme in cloud storage

The data deduplication technique can efficiently eliminate redundant data by keeping only one copy of the duplicate data. Convergent encryption (CE) has been widely used in secure deduplication to save storage space and reduce data upload bandwidth, but it still faces two problems. One is that CE is not semantically secure, and suffers from an offline brute-force attack when the data is selected from a predictable set. Another is the convergent...