一种区块链网络的DDoS攻击模型  

A DDoS ATTACK MODEL FOR BLOCKCHAIN NETWORK

作　　者：刘昌平 刘海[1] 李威[1] Liu Changping;Liu Hai;Li Wei(Computer Engineering Technical College,Guangdong Polytechnic of Science and Technology,Guangzhou 510640,Guangdong,China)

机构地区：[1]广东科学技术职业学院计算机工程技术学院,广东广州510640

出　　处：《计算机应用与软件》2024年第11期366-372,392,共8页Computer Applications and Software

基　　金：广东省教育厅普通高校重点领域专项项目(2019KZDZX1045);广东省教育厅普通高校特色创新项目(2019GKTSCX029);广东科学技术职业学院校级科研项目(XJPY202104)。

摘　　要：攻击区块链及应用的手段非常多。提出一种分布式拒绝服务攻击(Distributed Denied of Service,DDoS)攻击模型,建立2个指标衡量DDoS攻击对区块链网络性能的影响。以Hyperledger Fabric为环境,在6组实验中设置不同数量的DDoS攻击节点,仿真DDoS攻击事件,设置1组实验仿真DDoS攻击全过程。实验表明,区块链网络存在DDoS攻击的安全隐患,区块链对等节点可以成为DDoS攻击节点,攻击节点数量较少(占比低于33%或51%)时能发起DDoS攻击,DDoS攻击对区块链的破坏性主要是延长交易的结束时间,造成网络吞吐量及服务性能下降。There are many ways to attack blockchain and applications.We propose a DDoS attack model and establish two indicators to measure the impact of DDoS attacks on the performance of blockchain networks.Utilizing Hyperledger Fabric to construct the experimental environment,6 experiments with different number of attacking peer nodes were designed to simulate DDoS attack events.Another experiment simulated the whole process of DDoS attack from beginning to end.Experimental result shows that blockchain network is indeed vulnerable to the potential risk of DDoS attack.The internal peer nodes of blockchain have their probability of becoming the DDoS attacker.Even a small number of attackers(ratio below 33%or 51%)could attack blockchain.The main destruction of DDoS attack is delaying the service time of transaction,reducing the service throughput as well as performance.

关 键 词：区块链 网络安全 攻击 共识 拒绝服务 对等节点 

分 类 号：TP302.7[自动化与计算机技术—计算机系统结构]