LOPE:A Low-Overhead Payment Verification Method for Blockchains  

作　　者：ZHANG Ying HE Zhengyuan JIA Linpeng DING Donghui ZHANG Hanwen SUN Yi 

机构地区：[1]School of Software Engineering,Tongji University,Shanghai 201804,China [2]Blockchain Lab,Institute of Computing Technology,Chinese Academy of Sciences,Beijing 100190,China [3]School of Computer Science and Technology,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Journal of Electronics》2021年第2期349-358,共10页电子学报（英文版）

基　　金：This work is supported by the National Key R&D Program of China(No.2019YFB1404903);National Natural Science Foundation of China(No.61672499,No.61772502,No.61972382,No.61974105);Key Special Project of Beijing Municipal Science&Technology Commission(No.Z181100003218018).

摘　　要：With its characteristics of decentralization,security,data traceability,and tamper-resistance,the blockchain has been widely used in various domains.Considering the difference in the performance of the devices,the light client is proposed so that devices without the ability to store a full blockchain copy can also participate in the blockchain transactions.However,the light client has to communicate with full nodes and verify the authenticity of a transaction which brings in some extent of communication,computation,and storage overheads to the light client.These overheads cannot be ignored for some low-performance devices,such as embedded devices or Io T chips,and therefore the current light client scheme does not work in this situation.We propose LOPE(a Low-overhead payment v Erification method)for poor-capacity nodes in the blockchain system.In LOPE,a grouping protocol is designed to partition full nodes into groups to serve the verification requests of the light client.In addition,Practical byzantine fault tolerance(PBFT)is used to ensure the light client to get a credible result in spite of a few dishonest nodes existing in the group.We conduct LOPE and evaluate it in a testbed.The experiment results show that LOPE reduces more than half of the communication overhead,degrades the computation overhead of the light client to a large extent,and avoids the storage overhead of the hash roots of block headers in the light client.We also conduct theoretical analysis to show the performance improvement and security issues of LOPE.

关 键 词：Blockchain Light client Low-overhead Payment verification 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论]