Research on Blockchain Security Protection

In recent years, with the characteristics of nonforgery, nontampering and traceability, blockchain has changed the way of human social value transmission with a new trust system, and has been deeply integrated with industry applications. Due to the imbalance of security and privacy protection between nodes, however, the security and stability of blockchain system are damaged in the process of integration. The security and privacy of blockchain have attracted much more attention. From the perspective of security, this paper summarizes the security problems from the perspective of blockchain platform architecture, analyses the security issues such as data encryption storage, cross chain technology, key management technology, authorized consensus mechanism, and discusses the coping mechanisms and strategies. This paper also proposes the future development direction of blockchain based on the analysis of blockchain technology, transaction mechanism and supervision mechanism.