Supplementary information for An enhanced block validation framework with efficient consensus for secure consortium blockchains

Article abstractConsortium blockchains have attracted considerable interest from academia and industry due to their low-cost installation and maintenance. However, typical consortium blockchains can be easily attacked by colluding block validators because of the limited number of miners in the systems. To address this problem, in this article, we propose a novel block validation framework to enhance blockchain security. In the framework, the block validations are assisted and implemented by various lightweight nodes, e.g., edge devices, in addition to the typical blockchain miners. This improves the blockchain security but can cause an increased block validation delay and, thereby, reduced blockchain throughput. To tackle this challenge, we propose an effective method to select lightweight nodes based on their computing powers to maximize the blockchain throughput, and prove the uniqueness of the optimal nodes selection strategy. Security analysis and simulation results from the deployed consortium blockchain platform show that the proposed framework achieves higher throughput and security than the existing consortium blockchain models.© 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

摘要联盟链由于安装与维护的低成本而受到学术界和工业界的广泛关注。然而，由于系统中矿工数量的限制，典型的联盟链易受勾结的区块验证者攻击。为解决此问题，本文提出了一种新颖的区块验证框架，旨在提升区块链的安全性。在该框架中，区块验证不仅由传统的区块链矿工执行，还由各种轻量级节点协助，例如边缘设备。此举虽提升了区块链的安全性，但可能导致区块验证延迟的增加，进而降低区块链的吞吐量。为应对这一挑战，我们提出了一种基于节点计算能力选择轻量级节点的有效方法，以最大化区块链的吞吐量，并证明了最优节点选择策略的唯一性。对部署的联盟链平台进行的网络安全分析和仿真结果表明，所提出的框架相较于现有的联盟链模型，实现了更高的吞吐量和安全性。© 2023 IEEE。本材料仅限于个人使用。若需用于其他用途，包括在当前或未来媒体中重印/再版、用于广告或促销目的、创建新的集体作品、转售或重新分发至服务器或列表，或在本作品中任何受版权保护的成分在其他作品中再次使用，均需获得IEEE的许可。