NODE GROUP MANAGING DEVICE AND COMPUTING DEVICE FOR CONFIGURING GROUP KEY-BASED DUAL SIGNATURE TRANSACTION STRUCTURE IN BLOCKCHAIN NETWORK

摘要

A node group management device includes a communication interface managing a first group, to which some nodes belong among nodes that constitute a blockchain network sharing a distributed database, a memory that stores information related to a node of the first group (including a public key of each node of the first group), and a processor connected to the memory. All nodes participating in the blockchain network each include a private key and a public key. The processor operates according to instructions stored in the memory and generates a group private key allowing a transaction to be additionally signed based on said information while the transaction is signed with the private key when the node of the first group generates the transaction and configured to distribute the group private key to the first group so that the nodes of the first group hold the group private key in common.