A survey on privacy protection technology for blockchain transactions
Blockchain,as a decentralized,distributed storage peer-to-peer network technology,has been applied to various Internet interactive scenarios in recent years.However,the privacy protection flaws existing in blockchains limit its development and cause certain risks.First,we elaborate blockchains'data structure and node network,and then analyze the privacy and security issues regarding the account address,transaction content,network nodes,and node communication in blockchain transactions.Second,the existing blockchain privacy protection technology is described from four aspects:address obfuscation,content hiding,network protection,and communication isolation.Finally,we summarize the security and efficiency,supervision and protection of blockchains in terms of current application and practice of the existing technology,and provide future development of blockchain transactions.