A Method Of Exchanging Data In Smart City By Blockchain

The construction of smart city involves multiple corporate organizations and government agencies, while smart city operations often require data across organizations. This paper describes a blockchain-based approach to exchange information in smart cities that assists sharing data across multiple, nontrusted organizations. The proposed method enables an organization safely use data from another organization to participate in business operations without accessing the data. The data that participates in operations is in an encrypted form stored only in the executor sandbox. Consensus calculations are performed on multiple nodes by smart contract. After the confirmation through multiple nodes, the result of the calculation will be returned to the applicant. Thus, the risk of data leakage could be avoided. Our proposed method can effectively prevent the access to the information from being illegally obtained, used, and tampered. Also it ensures the reliable use of the data which enables the effective information sharing and protection of information among multiple organizations in the smart city applications.