【Author】
Zhou, Wei; Wang, Hao; Mohiuddin, Ghulam; Chen, Dan; Ren, Yongjun
【Source】INTELLIGENT AUTOMATION AND SOFT COMPUTING
【Abstract】As the basis of cloud computing, distributed storage technology mainly studies how data centers store, organize and manage data. Blockchain has become the most secure solution for cloud storage due to its decentralization and immutability. Consensus mechanism is one of the core technologies of blockchain, which affects the transaction processing capability, security and scalability of blockchain. The current mainstream consensus algorithms such as Proof of Work, Proof of Stake, and Delegated Proof of Stake all have the problem of wasting resources. And with the explosive growth of data, cloud storage nodes store a large amount of redundant data, which inevitably increases storage overhead and computing cost. To this end, we propose to use the Proof of Retrievability with deduplication algorithm as the consensus mechanism of the blockchain system and design a blockchain consensus protocol suitable for distributed storage. First, the data integrity verification protocol in the scheme guarantees that storage nodes correctly store the data they promise to store. Second, the deduplication algorithm in the protocol can optimize data auditing, greatly reduce the need for data storage space, and improve the scalability of data transmission. In addition, the scheme uses ring signatures in the audit process to ensure user anonymity and data unlinkability, while providing highly reliable data storage, and ensuring data storage security through blockchain. Finally, we demonstrate the security of the proposed scheme and evaluate its performance. The evaluation results show that our scheme is efficient and scalable.
【Keywords】Integrity verification; consensus; blockchain; deduplication
【摘要】分布式存储技术作为云计算的基础，主要研究数据中心如何存储、组织和管理数据。由于其去中心化和不变性，区块链已成为最安全的云存储解决方案。共识机制是区块链的核心技术之一，它影响着区块链的交易处理能力、安全性和可扩展性。目前主流的共识算法如Proof of Work、Proof of Stake、Delegated Proof of Stake等都存在资源浪费的问题。并且随着数据的爆炸式增长，云存储节点存储了大量的冗余数据，不可避免地增加了存储开销和计算成本。为此，我们提出使用带去重算法的可检索证明作为区块链系统的共识机制，设计适合分布式存储的区块链共识协议。首先，方案中的数据完整性验证协议保证了存储节点正确地存储了它们承诺存储的数据。其次，协议中的去重算法可以优化数据审计，大大减少对数据存储空间的需求，提高数据传输的可扩展性。此外，该方案在审计过程中使用环签名，保证用户匿名性和数据不可链接性，同时提供高可靠的数据存储，通过区块链保证数据存储安全。最后，我们证明了所提出方案的安全性并评估其性能。评估结果表明，我们的方案是高效和可扩展的。
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