Traceable privacy information retrieval method based on block chain

The invention discloses a blockchain-based traceable privacy information retrieval method, which is characterized by comprising an Internet of Things data acquisition device, a data owner, a data retrieval party, a storage node and a blockchain node multi-party entity, and the method comprises the following steps: 1) initializing a system; 2) registering an owner device; the method comprises the steps of (1) data processing, (2) data processing, (3) data issuing, (4) block chain retrieval, (5) permission application, (6) access and permission verification, (7) privacy retrieval and (8) data decryption.By means of the method, distributed permission granting and data flow key sharing on the block chain can be achieved, decentralized controllable supervision of original data and access of Internet of Things equipment is practically protected, and authenticity and integrity of data collaborative transaction are guaranteed. 本发明公开了一种基于区块链和可追踪的隐私信息检索方法，其特征在于，包括物联网数据采集设备、数据所有方、数据检索方、存储节点和区块链节点多方实体，所述方法包括如下步骤：1）系统初始化；