Research On Attack Defense Technology Of IoT Devices Based On Blockchain

The increased dramatically number of Internet of Things devices brings convenience to people,but also brings many security risks to the Internet of Things devices.Network or network Participants may be attacked by counterfeit Io T devices.By performing credible management of the identity information of the Io T devices,the counterfeiting problem existing in the Io T devices can be solved.However,most of the existing Io T device identity information management solutions need to rely on a trusted central server,and the trust management cost is high,and there may be a problem that the central server leaks the Io T device identity information.The blockchain technology provides a design idea for the security protection of Io T devices in a decentralized mode.A decentralized mode is used to manage the identity information of Io T devices in a trusted manner to ensure that the authenticity of Io T devices to prevents counterfeit Io T devices from launching counterfeit attacks.This thesis proposes a blockchain-based attack defense scheme for Io T devices.The main work is as follows:Aiming at the attack threat of counterfeit Io T devices facing the Internet of Things,this thesis researches the attack defense technology of Io T devices based on blockchain and proposes a blockchain-based attack defense model for Io T devices.The trusted registration mechanism,trusted verification mechanism,and trusted isolation mechanism of networked devices are used to manage the authenticity of Io T devices in the network through blockchain to ensure that the identity information of Io T devices in the network will not be stolen and changed.According to the security representation requirements of Io T devices in the defense model,the security identification method of Io T device identity information based on blockchain is researched.The key address identifies the Io T device entity and has the ability to verify the authenticity of the Io T device.A blockchain-based Io T device attack defense scheme is proposed.The Io T device identity information in the network is registered in the blockchain,and the authenticity and trustworthiness of the device identity information is managed.The fake device isolation mechanism realizes secure communication between devices,ensures the authenticity of devices in the network,and prevents attacks by fake Io T devices in the network.For validating the attack defense scheme proposed in this thesis,the Ethereum blockchain platform is used to complete the simulation implementation of the system,including system design,design and implementation of smart contracts,and implementation of system functions.The design of the test scheme for the simulation experiment is completed,and the system is functionally tested according to the test scheme.The test results show that the scheme can realize the trusted registration and trusted verification of device identity information without relying on a trusted third party,and isolate the detected counterfeit devices,which can effectively defend against counterfeit Io T devices attack in the network.