PieBridge:一种按需可扩展的跨链架构  

PieBridge:An On-Demand Scalable Cross-Chain Architecture

作　　者：段田田 郭仪 李博[1,2] 张瀚文 宋兆雄[1] 李忠诚 张珺 孙毅[1,2] Duan Tiantian;Guo Yi;Li Bo;Zhang Hanwen;Song Zhaoxiong;Li Zhongcheng;Zhang Jun;Sun Yi(Institute of Computing Technology,Chinese Academy of Sciences,Beijing 100190;University of Chinese Academy of Sciences,Beijing 101408;Inner Mongolia University,Hohhot,Inner Mongolia 010021)

机构地区：[1]中国科学院计算技术研究所,北京100190 [2]中国科学院大学,北京101408 [3]内蒙古大学,内蒙古呼和浩特010021

出　　处：《计算机研究与发展》2023年第11期2520-2533,共14页Journal of Computer Research and Development

基　　金：国家重点研发计划(2022YFB2702902);国家自然科学基金项目(61972382);内蒙古自然科学基金项目(2020MS06017)。

摘　　要：区块链由于其去中心、可溯源等特性,已被广泛应用于数字货币、供应链金融、智慧医疗等不同领域.随着应用需求的不断拓宽,各独立区块链协作以构建更广泛价值互联网的需求日益增强,因而迫切需要研究跨链技术.然而当前区块链生态规模不断扩大、丰富,异构/同构区块链间的互联互通需求也随之快速增长.而现有跨链研究无法应对架构可扩展性与跨链需求多样性方面的挑战.针对上述问题,基于“按需建域”的理念,提出一种按需可扩展的跨链架构PieBridge,并提出了一套4层跨链交互协议栈,解耦跨链传输、验证、事务与应用,满足不同跨链应用在隐私、安全、性能等方面的差异化需求.同时实现了PieBridge原型系统,并通过建模分析与实验证明了PieBridge的可扩展性以及其对差异化跨链交互需求的灵活支持.Due to its decentralized and traceable nature,blockchain has been widely used in various fields such as digital currency,supply chain finance,and smart healthcare.As the demand for applications continues to expand,the need for independent blockchains to collaborate to build a broader value Internet is increasing,making it urgent to study cross-chain technology.However,as blockchain develops towards the application chain model,the number of blockchains has greatly increased,and the scale of cross-chain interaction has also increased.Existing cross-chain research cannot meet the challenges in terms of architectural scalability and cross-chain requirements diversity.Therefore,featured by the idea of“on-demand domain”,we propose an on-demand and scalable cross-chain architecture called PieBridge and raise a four-layer cross-chain interaction protocol stack.By decoupling cross-chain transmission,verification,transactions and applications,our protocol stack meets the diverse requirements of crosschain applications in terms of privacy,security,and performance.We implement the PieBridge prototype system and further verify PieBridge's scalability and flexible support for diverse cross-chain interactions from both theoretical and experimental perspectives.

关 键 词：区块链 跨链 原子性 跨链传输 排队论 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]