Fed-DDM：一个基于联邦分类账的分层分散数据市场框架
Fed-DDM: A Federated Ledgers based Framework for Hierarchical Decentralized Data Marketplaces
摘要：
数据市场（DM）促进了物联网（IoT）在智慧城市中的优势。为了促进设备所有者和第三方应用程序之间轻松交换实时物联网数据流，需要为不同应用程序供应商运营的大量分布式物联网设备提供可扩展，可互操作和安全的服务。由于去中心化，不变性和可扩展性，区块链有望实现防篡改和无信任框架，以提高集中式DM的性能和安全问题。然而，直接将区块链集成到基于物联网的大规模DM中仍然面临许多限制，例如高资源和能源需求，低交易吞吐量，可扩展性差以及隐私保护方面的挑战。本文介绍了一种新的基于联邦分类帐的分层分散数据市场框架（Fed-DDM）。在Fed-DDM中，参与者根据其注册被划分到多个许可域中。每个域利用高效的拜占庭容错（BFT）共识协议来在私有内部分类账上提交域的交易。公共账本间网络采用可扩展的工作量证明（PoW）共识协议来联合多个私有账本内网络。我们设计了一个支持智能合约的跨账本协议，以保证公共联合账本上跨域操作的安全性，而不会暴露私有账本的敏感隐私信息。实现了一个概念验证原型，实验结果验证了所提出的Fed-DDM解决方案的性能和安全性保证的可行性。
英文摘要：
Data marketplaces (DMs) promote the benefits of the Internet of Things (IoT) in smart cities. To facilitate the easy exchanges of real-time IoT data streams between device owners and third-party applications, it is required to provide scalable, interoperable, and secured services for large numbers of distributed IoT devices operated by different application vendors. Thanks to decentralization, immutability, and auditability, Blockchain is promising to enable a tamper-proof and trust-free framework to enhance performance and security issues in centralized DMs. However, directly integrating blockchains into large-scale IoT-based DMs still faces many limitations, such as high resource and energy demands, low transaction throughput, poor scalability, and challenges in privacy preservation. This paper introduces a novel Federated Ledgers-based Framework for Hierarchical Decentralized Data Marketplaces (Fed-DDM). In Fed-DDM, participants are divided into multiple permissioned domains given their registrations. Each domain leverages an efficient Byzantine Fault Tolerance (BFT) consensus protocol to commit transactions of a domain on a private intra-ledger. A public inter-ledger network adopts a scalable Proof-of-Work (PoW) consensus protocol to federate multiple private intra-ledger networks. We design a smart contract-enabled inter-ledger protocol to guarantee the security of the cross-domain operations on a public federated ledger without exposing sensitive privacy information from private ledgers. A proof-of-concept prototype is implemented, and the experimental results verify the feasibility of the proposed Fed-DDM solution with performance and security guarantees.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
