Fecha de publicación: 24/08/2023 Fuente: Wipo "BigData" A blockchain-based big data analysis and decision-making system and method implement consolidation of a key mapping table preset by the system. On-chain storage of a blockchain can be adopted, thereby avoiding missing an association relationship of security policy query when performing decision-making in network security events. By taking a security event as a unit, network attack data can be separated at an appropriate granularity more reasonably by analyzing network security attack events and fault events and performing targeted decision-making based on event-based attack information, thereby implementing differentiated protection of network security and more accurate granularity of network security protection. Based on security attack big data in a cloud computing system, event-based security information big data can be migrated to a cloud to consolidate storage. The system can acquire relevant information of historical security events out of band to assist in performing blockchain-based event-based target intelligent big data analysis and decision-making.