Second, existing PoS-like schemes, including PDP and Proofs of Retrievability (PoR), do not support data log related auditing in the process of data possession proof. The logs are critical in addressing disputes in practice. PROPOSED SYSTEM: To address the existing issues for securing outsourced data in clouds, this paper proposes an identity-based data outsourcing (IBDO) system in a setting. Our scheme has the following distinguishing features. A user and her authorized proxies can securely Identity-based outsourcing. outsource files to a remote cloud server which is not fully trustable, while any unauthorized ones cannot outsource files on behalf of the user. The cloud clients, including the file-owners, proxies and auditors, are recognized with their identities, which avoids the usage of complicated cryptographic certificates. This delegate mechanism allows our scheme to be efficiently deployed in a multi-user setting. Comprehensive auditing. Our IBDO scheme achieves a strong auditing mechanism. The integrity of outsourced files can be efficiently verified by an auditor, even if the files might be outsourced by different clients. Also, the information about the origin, type and consistence of outsourced files can be publicly audited. Similar to existing publicly auditable schemes, the comprehensive auditability has advantages to allow a public common auditor to audit files owned by different users, and in case of disputes, the auditor can run the auditing protocol to provide convincing judicial witnesses without requiring disputing parties to be corporative.
Second, existing PoS-like schemes, including PDP and Proofs of Retrievability (PoR), do not support data log related auditing in the process of data possession proof. The logs are critical in addressing disputes in practice. PROPOSED SYSTEM: To address the existing issues for securing outsourced data in clouds, this paper proposes an identity-based data outsourcing (IBDO) system in a setting. Our scheme has the following distinguishing features. Identity-based outsourcing. A user and her authorized proxies can securely outsource files to a remote cloud server which is not fully trustable, while any unauthorized ones cannot outsource files on behalf of the user. The cloud clients, including the file-owners, proxies and auditors, are recognized with their identities, which avoids the usage of complicated cryptographic certificates. This delegate mechanism allows our scheme to be efficiently deployed in a multi-user setting. Comprehensive auditing. Our IBDO scheme achieves a strong auditing mechanism. The integrity of outsourced files can be efficiently verified by an auditor, even if the files might be outsourced by different clients. Also, the information about the origin, type and consistence of outsourced files can be publicly audited. Similar to existing publicly auditable schemes, the comprehensive auditability has advantages to allow a public common auditor to audit files owned by different users, and in case of disputes, the auditor can run the auditing protocol to provide convincing judicial witnesses without requiring disputing parties to be corporative.
Identity-Based-Data-Outsourcing.docx