中国邮电高校学报(英文) ›› 2021, Vol. 28 ›› Issue (5): 1-17.doi: 10.19682/j.cnki.1005-8885.2021.0029

所属专题: Special issue on Blockchain Technology and Applications

• Blockchain •    下一篇

Research on cross-chain and interoperability for blockchain system

李鸣1,2,邱鸿霖3,4,徐泉清3,3,宋文鹏5   

  1. 1. 上海市智能信息处理重点实验室 复旦大学计算机科学技术学院
    2. 中国电子技术标准化研究院
    3.
    4. 蚂蚁金服
    5. 复旦大学
  • 收稿日期:2021-06-21 修回日期:2021-10-20 出版日期:2021-10-31 发布日期:2021-10-29
  • 通讯作者: 李鸣 E-mail:13701388822@139.com

Research on cross-chain and interoperability for blockchain system

  • Received:2021-06-21 Revised:2021-10-20 Online:2021-10-31 Published:2021-10-29
  • Contact: Ming Li E-mail:13701388822@139.com

摘要:

At present, there is an urgent need for blockchain interoperability technology to realize interconnection between various blockchains, data communication and value transfer between blockchains, so as to break the ‘ value silo’ phenomenon of each blockchain. Firstly, it lists what people understand about the concept of interoperability. Secondly, it gives the key technical issues of cross-chain, including cross-chain mechanism, interoperability, eventual consistency, and universality. Then, the implementation of each cross-chain key technology is analyzed, including Hash-locking, two-way peg, notary schemes, relay chain scheme, cross-chain protocol, and global identity system. Immediately after that, five typical cross-chain systems are introduced and comparative analysis is made. In addition, two examples of cross-chain programmability and their analysis are given. Finally, the current state of cross-chain technology is summarized from two aspects: key technology implementation and cross-chain application enforcement. The cross-chain technology as a whole has formed a centralized fixed mechanism, as well as a trend of modular design, and some of the solutions to mature applications were established in the relevant standards organizations, and the cross-chain technology architecture tends to be unified, which is expected to accelerate the evolution of the open cross-chain network that supports the real needs of the interconnection of all chains.


关键词:

blockchain, distributed ledger technology, cross-chain, interoperability, Hash-locking, notary, relay, multi-chain


Abstract:

At present, there is an urgent need for blockchain interoperability technology to realize interconnection between various blockchains, data communication and value transfer between blockchains, so as to break the ‘ value silo’ phenomenon of each blockchain. Firstly, it lists what people understand about the concept of interoperability. Secondly, it gives the key technical issues of cross-chain, including cross-chain mechanism, interoperability, eventual consistency, and universality. Then, the implementation of each cross-chain key technology is analyzed, including Hash-locking, two-way peg, notary schemes, relay chain scheme, cross-chain protocol, and global identity system. Immediately after that, five typical cross-chain systems are introduced and comparative analysis is made. In addition, two examples of cross-chain programmability and their analysis are given. Finally, the current state of cross-chain technology is summarized from two aspects: key technology implementation and cross-chain application enforcement. The cross-chain technology as a whole has formed a centralized fixed mechanism, as well as a trend of modular design, and some of the solutions to mature applications were established in the relevant standards organizations, and the cross-chain technology architecture tends to be unified, which is expected to accelerate the evolution of the open cross-chain network that supports the real needs of the interconnection of all chains.



Key words:

blockchain, distributed ledger technology, cross-chain, interoperability, Hash-locking, notary, relay, multi-chain