Review of research on blockchain privacy protection technologies
In recent years,blockchain has attracted increasing attention in both academic and industrial circles,and the pri-vacy of blockchain remains a controversial issue when deploying blockchain in different applications.This paper systematically reviewed the current privacy protection schemes and mechanisms in blockchain,and gave insights into the security and privacy of blockchain.Firstly,this paper briefly introduced the main functions,types and privacy definitions of blockchain technolo-gy,and analyzed the privacy issues it faced.Then,from a technical perspective,this paper divided blockchain privacy protec-tion technology into four categories:decentralized identity authentication,privacy protocol,encryption technology and obfusca-tion technology,as well as eight sub-categories:decentralized identity authentication,secure multi-party computation,differen-tial privacy,homomorphic encryption,zero-knowledge proof,coin mixing technology,ring signature and anonymous communi-cation.This paper studied them separately,and summarized the mechanisms of different privacy protection technologies on permissioned and permissionless blockchains.Finally,this paper conducted qualitative research on the main characteristics and attributes of the eight privacy protection technologies,and discussed future research directions of privacy protection tech-nologies.The research provided reference for blockchain developers to choose appropriate privacy protection schemes and for researchers to choose research directions for blockchain privacy protection.
万方数据
维普
