A Public Auditing Protocol for Cloud Storage System With Intrusion-Resilience

A Public Auditing Protocol for Cloud Storage System With Intrusion-Resilience
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一种具有抗入侵能力的云存储系统公共审计协议

DOI:
10.1109/jsyst.2019.2923238
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发表时间:
2020-03
影响因子:
4.4
通讯作者:
Hong Zhong
Hong Zhong
中科院分区:
计算机科学2区
文献类型:
--
作者:
Ran Ding;Yan Xu;Jie Cui;Hong Zhong

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云存储审计可帮助用户检查其存储在云上的数据的完整性。然而,如果客户端的审计密钥暴露在恶意云中,客户端的数据可能会被恶意云删除而不被检测到。本文提出了一种具有抗入侵能力的公共审计协议,以缓解密钥暴露问题带来的损害。该协议将存储在云上的文件的生命周期划分为几个时间段,每个时间段又进一步划分为几个刷新周期。审计密钥在每个时间段中更新,用于更新审计密钥的密码值在每个刷新周期中改变。这两个更新操作由客户端和第三方审核员(TPA)完成。只要客户端和TPA在相同的刷新周期内不受攻击,该协议就是安全的。随机预言模型下的安全性证明证明了协议是安全的,实验结果表明协议的性能是可以接受的。
Cloud storage auditing helps users to check the integrity of their data stored on the cloud. However, if the client's auditing secret key is exposed to the malicious cloud, the client's data may be deleted by the malicious cloud without being detected. In this paper, we propose a public auditing protocol with intrusion-resilience to relieve damage caused by the key-exposure problem. The proposed protocol divides the lifetime of files stored on the cloud into several time periods, and each time period is further divided into several refreshing periods. The auditing secret key is updated in each time period, and secret values used to update the auditing secret key change in every refreshing period. These two update operations are completed by the client and the third party auditor (TPA). This protocol is secure against the adversary as long as the client and TPA are not compromised in the same refreshing period. Security proof under random oracle model proves the protocol is secure, and the experimental results indicate that the performance of the protocol is acceptable.
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