Cloud storage can provide a way to effectively store and manage big data. However, due to the separation of data ownership and management, it is difficult for users to check the integrity of data in a traditional way, which leads to the introduction of the auditing techniques. This paper proposes a public auditing protocol with a self-certified public key system using blockchain technology. The user's operational information and metadata information of the file are formed to a block after verified by the checked nodes and then to be put into the blockchain. The chain structure of the block ensures the security of auditing data source. The security analysis shows that attackers can neither derive user’s secret key nor derive users’ data from the collected auditing information in the presented scheme. Furthermore, it can effectively resist against not only the signature forging attacks but also the proof forging attacks. Compared with other public auditing schemes, our scheme based on the self-certified public key system has been improved in storage overhead, communication bandwidth, and verification efficiency.

中文翻译：

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基于区块链的带有自认证公钥的公共审计协议，用于云数据

云存储可以提供一种有效存储和管理大数据的方法。然而，由于数据所有权和管理的分离，用户难以以传统方式检查数据的完整性，这导致了审计技术的引入。本文提出了一种使用区块链技术，具有自认证公钥系统的公共审计协议。用户的操作信息和文件的元数据信息经过检查的节点验证后形成一个块，然后放入区块链中。块的链结构确保审计数据源的安全性。安全分析表明，攻击者既不能从用户提出的方案中获取用户的秘密密钥，也不能从收集到的审核信息中获取用户的数据。此外，它不仅可以有效地抵抗签名伪造攻击，还可以抵抗证明伪造攻击。与其他公共审核方案相比，我们基于自认证公钥系统的方案在存储开销，通信带宽和验证效率方面得到了改进。