Research on Cross-chain Technology of Blockchain

doi:10.3969/j.issn.1671-1122.2019.08.012

Abstract

Abstract:

With the continuous development and innovation of blockchain technology, a large number of blockchain networks with different characteristics and adapting to different scenarios have emerged in the fields of payment and settlement, product traceability and identity authentication, forming many value islands. Blockchain cross-chain technology is an important technical means to achieve inter-chain connectivity and value transfer. This paper systematically summarizes the current mainstream cross-chain technologies. Firstly, this paper analyzes the characteristics of cross-chain technology, and then summarizes the difficulties of cross-chain technology and its reference solutions. Furthermore, this paper introduces four main cross-chain techniques. Finally, this paper analyzes the challenges of cross-chain technology and forecasts its future prospect.

Key words: blockchain, cross-chain, interoperability

CLC Number:

TP309

Aitong LU, Kuo ZHAO, Jingying YANG, Feng WANG. Research on Cross-chain Technology of Blockchain[J]. Netinfo Security, 2019, 19(8): 83-90.

Figures/Tables 2

References 27

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跨链机制性能	公证人模式	侧链/中继	哈希锁定	分布式私钥控制
互操作性	所有	所有（需要所有链上都有中继,否则只支持单向）	只有交叉依赖	所有
信任模型	多数公证人诚实	链不会失效或受到51%攻击^[24]	链不会失效或受到51% 攻击	链不会失效或受到51% 攻击
使用跨链交换	支持	支持	支持	支持
使用跨链资产转移	支持（需要长期公证人信任）	支持	不支持	支持
适用跨链原语	支持	支持	不直接支持	支持
适用跨链资产抵押	支持（需要长期公证人信任）	支持	大多数支持但有难度	支持
多种币智能合约	困难	困难	不支持	支持
实现难度	中等	难	容易	中等