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Insecurity of a Public Proof of Cloud Storage from Lattice Assumption

机译:格子假设对云存储的公共证明不安全

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摘要

Cloud storage auditing is considered as a significant service to verify the integrity of the data stored in cloud. Liu et al. have proposed a proof of storage protocol with public auditing form lattice assumption, which can resist quantum computer attacks. They claim that the protocol enjoys desirable security properties, such as unforgeability and privacy preserving. We demonstrate that any malicious cloud service provider can cheat the third party auditor and the users, through generating the valid response proof which can pass the verification even if some other data blocks are lost by accident. And the primitive data blocks maybe recovered by any curious third party auditor through solving some linearly equations. Our work can help cryptographers and engineers design and implement more secure and efficient lattice-based public auditing scheme for the cloud storage data.
机译:云存储审核被视为一项重要服务,可以验证存储在云中的数据的完整性。刘等。提出了带有公共审计形式格假设的存储协议证明,可以抵御量子计算机的攻击。他们声称该协议享有理想的安全性,例如不可伪造性和隐私保护。我们证明,任何恶意的云服务提供商都可以通过生成有效的响应证明来欺骗第三方审核员和用户,即使其他一些数据块意外丢失也可以通过验证。并且,任何好奇的第三方审计师都可以通过求解一些线性方程式来恢复原始数据块。我们的工作可以帮助密码学家和工程师为云存储数据设计和实施更安全,高效的基于格的公共审计方案。

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