While data sharing cross management is increasingly popular, there are challenges in such a decentralized data sharing mode, especially in terms of transaction fairness and copyright protection. However, few schemes consider both fairness and copyright protection in the current literature. In this paper, we propose a flexible and Ethereum-based scheme to facilitate copyright protection in data sharing blockchain, by using watermark-based policies. This allows us to achieve properties such as preventing the re-selling of data (e.g., partial data, combined data, and leaked data). We also design five algorithms to automatically guarantee data sharing fairness and proactively protect data copyright, by using smart contracts. In other words, several new security features are introduced to existing transaction schemes, while still achieving feasible performance. The response times for each key step of smart contract in the proposed scheme is between 0.41 s and 0.91 s.

尽管数据共享跨管理越来越流行，但在这种分散式数据共享模式中仍存在挑战，特别是在交易公平性和版权保护方面。但是，在目前的文献中，很少有方案同时考虑公平和版权保护。在本文中，我们提出了一种基于以太坊的灵活方案，通过使用基于水印的策略来促进数据共享区块链中的版权保护。这使我们能够实现诸如防止数据（例如，部分数据，组合数据和泄漏数据）的转售的属性。我们还设计了五种算法，可以通过使用智能合约自动保证数据共享的公平性并主动保护数据版权。换句话说，现有交易方案中引入了几种新的安全功能，同时仍能达到可行的性能。该方案中智能合约每个关键步骤的响应时间在0.41 s至0.91 s之间。