Security and privacy protection technologies in securing blockchain applications

As a key technology for building trust networks and implementing value interconnections, blockchain has received extensive attention. There are numerous technical use cases for blockchains in a variety of areas, such as digital currency systems, Internet of Things (IoT), smart grids, supply blockchain and finance. However, the widespread application of blockchain also encounters many security and privacy issues. This article presents an overview and analysis of privacy protection, security supervision and data exchange in blockchain-based applications, providing a comprehensive analysis of the wide application of blockchain. Moreover, blockchain's future research directions and development trends are discussed.