Abstract: In the era of big data, the sharing of big data can effectively solve the phenomenon of “data islands”, data resources can be effectively integrated, and the natural characteristics of blockchain technology such as decentralization, openness, autonomy, anonymity, and information cannot be falsified. Promote the sharing of big data security. Moreover, the big data of government affairs contains huge economic value and social value. The safe sharing of government big data has great significance for the transformation of the government and the transformation of the social demand pattern. In this paper, it takes government big data as an example, analyzes the feasibility study of big data security sharing based on blockchain, proposes a big data security sharing demand model based on blockchain and guarantee scheme, and finally gives the based area. The characteristics of big data security sharing of blockchain technology are expected to provide a useful reference for the government e-government big data security sharing

Key words: Blockchain, E-government, big data, security, sharing

摘要： 大数据时代，大数据的共享能够有效解决“数据孤岛”的现象，数据资源也能有效整合，区块链技术的去中心化、开放性、自治性、匿名性、信息不可篡改等天然特性可以推动大数据安全的共享。再则，政务大数据蕴含的是巨大的经济价值和社会价值，政务大数据的安全共享对政府的转型，社会需求模式的转变都具有极大意义。以此，本文以政务大数据为例，分析了基于区块链的大数据安全共享的可行性研究，提出了基于区块链的大数据安全共享需求模型以及保障方案，最后给出了基于区块链技术的大数据安全共享的特点，以期为政府电子政务大数据安全共享提供有益参考。

关键词: 区块链, 电子政务, 大数据, 安全, 共享