Development and Application of Blockchain Cross-chain Technology

Abstract

With the continuous development and innovation of blockchain technology,a large number of blockchain-based applications have been generated.Today’s blockchain systems are mostly heterogeneous and not interconnected,and there is no direct value circulation between chains.This greatly limits the functional expansion and development of blockchains.Cross-chain technology refers to the exchange of information between different blockchain system instances and the use of the exchanged information to achieve interconnection and value transfer between blockchains.Firstly,this paper introduces the development process of blockchain cross-chain technology,and introduces in detail four current mainstream cross-chain technologies including the notary mechanism,the side chain relay,the hash lock and the distributed private key control.Then,based on the above-mentioned cross-chain technology,it further introduces several current mainstream cross-chain projects and applications.Finally,by comparing the similarities and differences of several cross-chain technologies in trust model,security,atomicity,scalability,etc.,the current development trend of cross-chain technology is summarized and analyzed,and the difficulties and future development direction in the field of cross-chain are discussed.

Keywords

• blockchain|cross-chain technology|notary mechanism|side chain relay|hash lock|distributed private key control