A Novel Deduplication-Based Covert Channel in Cloud Storage Service

摘要: To efficiently provide cloud storage services, most providers implement data deduplication schemes so as to reduce and network bandwidth consumption. Due its broad application, many security issues about have been investigated, such security, user privacy, etc. Nevertheless, we note that the threat of establishing covert channel over has not fully investigated. In particular, existing studies only demonstrate potential a single-bit channel, in which sender can upload one two predefined files for receiver infer information "0" "1". this paper, design more powerful deduplicationbased be used transmit complete message. Specifically, key features our include: (1) synchronization scheme establish between receiver, (2) novel coding allows each file represent multiple bits evaluate proposed design, conduct extensive experiments different systems. Our work highlights severe services.