Blockchain based Big Data Platform of City Brain

Blockchain technology, with its distributed ledger, decentralization, high security, no tampering and other features, helps to solve the problems of data source confirmation, traceability and authorized data sharing. The effective utilization of data to achieve automatic governance and trusted decision-making of the city is known as "City Brain". The city brain is the key in smart city development, while the key to build a city brain is data resources. Aiming at the challenges existing in the construction of big data platform, this paper proposes a new solution based on blockchain, establishes the entity model and data model, analyzes the business model, designs the blockchain data platform framework and the cloud-blockchain integrated operation mode, and at last discusses the issues concerned in the application.