Block chain-based data sharing method and system

• Main Authors: LIN YUANMIN, MAI PEIYU, LIN BAOQUAN, SU LINQI, WANG HONGLONG, ZENG YOUCHENG, MAO DAISHAN, WANG CHAOBO, KE YAPING, LIU LINGFENG, XIAO MIAOMIAO, CHEN YIBIN
• Format: Patent
• Language: Chinese; English
• Published: 16.11.2021
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; PHYSICS; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The invention relates to the technical field of block chains, and provides a block chain-based data sharing method, which comprises the following steps: a holder node corresponding to a data holder direction links a data evidence transaction of shared data so as to share the data evidence transaction to other nodes in a block chain network; a data query party obtains the data evidence storage transaction through a corresponding query party node, and links the data query transaction of the shared data; after receiving the data query transaction through the holder node, the data holder acquires the shared data from a database according to the identification information; the data holder or the holder node encrypts the shared data based on the asymmetric encryption key, and authorizes an evidence storage transaction to link a query containing the encrypted shared data through the holder node; and the data query party obtains the shared data through the query party node. The invention further provides a block chai