With the increasing utilization of space related data, the demand for spatial big data sharing and trading is growing rapidly, which promotes the emergence of spatial data market. However, in conventional data markets, both data buyers and data sellers have to use a centralized trading platform which might be dishonest. Blockchain is a decentralized distributed data storage technology, which uses the traceability and unforgeability to confirm and record each transaction, and can solve partial disadvantages of the centralized data market; unfortunately, it also introduces the problems of security and privacy. To address this issue, in this paper, we propose a blockchain-based spatial data trading framework with trusted execution environment to provide a trusted decentralized platform, including data storage, data query, data pricing, data reputation and security computing. Based on this framework, we use an auction pricing mechanism to ensure data trading authenticity and efficiency. At last, a spatial data trading framework was implemented and its effectiveness and security were verified.

随着空间相关数据利用率的提高，对空间大数据共享和交易的需求快速增长，推动了空间数据市场的出现。然而，在传统的数据市场中，数据买家和数据卖家都必须使用中心化的交易平台，这可能是不诚实的。区块链是一种去中心化的分布式数据存储技术，利用可追溯性和不可伪造性对每一笔交易进行确认和记录，可以解决中心化数据市场的部分弊端；不幸的是，它还引入了安全和隐私问题。针对这一问题，本文提出了一种基于区块链的空间数据交易框架和可信执行环境，以提供一个可信的去中心化平台，包括数据存储、数据查询、数据定价、数据信誉和安全计算。基于这个框架，我们采用拍卖定价机制来保证数据交易的真实性和效率。最后，实现了空间数据交易框架，验证了其有效性和安全性。