Decentralization initiatives like Solid enable data owners to control who has access to their data and to stimulate innovation by creating both application and data markets. Once data owners share their data with others, though, it is no longer possible for them to control how their data are used. To address this issue, we propose a usage control architecture to monitor compliance with usage control policies. To this end, our solution relies on blockchain and trusted execution environments. We demonstrate the potential of the architecture by describing the various workflows needed to realize a motivating use case scenario for data markets. Additionally, we discuss the merits of the approach from privacy, security, integrateability, and affordability perspectives.

翻译：去中心化倡议（如Solid）允许数据所有者控制谁可以访问其数据，并通过创建应用和数据市场来激发创新。然而，一旦数据所有者与他人共享数据，就无法再控制其数据的使用方式。为解决这一问题，我们提出了一种使用控制架构，用于监控使用控制策略的执行情况。为此，我们的方案依赖于区块链和可信执行环境。通过描述实现数据市场激励用例场景所需的各种工作流程，我们展示了该架构的潜力。此外，我们从隐私性、安全性、可集成性和经济性角度讨论了该方法的优势。