Published Paper Details:

Cloud storage system provides facilities like sharing services and data storage for distributed clients. To address integrity, controllable outsourcing and origin evaluating concerns on outsourced ?les, we propose an identity based data outsourcing (IBDO) plot outfitted with desirable features advantageous over existing proposals in securing outsourced information. First, our IBDO plot enables a user to authorize dedicated proxies to transfer information to the distributed storage server for her behalf, e.g., an organization may approve a few employees to transfer ?les to the organization's cloud account in a controlled way. The proxies are identi?ed and approved with their conspicuous identities, which eliminates complicated certi?cate management in normal secure distributed computing systems. Second, our IBDO plot encourages comprehensive auditing, i.e., our scheme not just allows regular integrity auditing as in existing schemes for securing outsourced information, yet additionally permits to audit the information on data origin, type and consistence of outsourced ?les. Security investigation and experimental evaluation show that our IBDO scheme gives solid security with desirable ef?ciency.