关键词: 数据流通, 区块链, 数据保全与存证, 用户授权, 个人信息保护

Abstract: The circulation of data elements has become an important means of developing digital economy, but there are still many difficulties and challenges in achieving an orderly circulation of data. Taking the talent employment service scenario as an example, this article analyzes the pain points and needs of all parties in the business from the perspective of data circulation, and discusses how the data authorization service based on blockchain technology can protect personal information security and the data rights of all parties. Under the premise, through the effective authorization of data related parties, data can be transmitted from providers to users, so as to meet the reasonable needs of different organizations for data collected by government, improve the government's governance capabilities, optimize public services quality, and boost the benign development of the data elements market.

Key words: data circulation, blockchain, data preservation and storage, user authorization, personal information protection