Internet Of Things Identity Security Authentication System Based On Blockchain

The Internet of Things is an extension and expansion on the basis of the Internet.Through infrared photoelectric,ultrasonic,radio frequency identification,temperature and humidity and other sensors,devices are connected to the Internet to exchange and communicate information,so as to realize intelligent identification,positioning,Monitoring and management.As an extension of Internet technology,Io T technology plays a huge role in the fields of smart home,autonomous driving,logistics management,and industrial control.Io T devices in an open environment need to be identified and authenticated with each other,so that the data exchanged with each other can be guaranteed to be complete and secure.Therefore,the authentication of Io T device identities is still the key to the security of Io T systems.Most of the existing Io T device identity authentication schemes rely on a trusted authority to generate certificates,However,as long as the central node fails,the whole system will be affected.As a mature distributed storage technology,blockchain,with its immutable and traceable characteristics,provides a brand-new solution for Io T identity security authentication.At the same time,Io T devices have limited computing performance due to cost considerations.How to achieve trusted identity authentication between Io T devices is also a challenge.This thesis focuses on blockchain technology and Io T identity security authentication solutions.The following is the main research content of this subject:This thesis proposes a blockchain-based Io T identity authentication scheme.The roles of distributed edge nodes and management gateways are introduced into the system,which are jointly responsible for the registration of Io T sensing devices.The information such as the hash value and number of the serial number of the sensing device is written into the blockchain through the smart contract,and the authentication between the devices and between the device and the distributed edge node is realized through the designed smart contract.Sensing devices add access validity time and enhance the security of the identity authentication system.The introduction of blockchain technology ensures the transparency and traceability of the system in the storage of key information and the registration and authentication of equipment.Finally,after the safety evaluation and the performance test of the comparison scheme,it is concluded that the system scheme has certain advantages and feasibility.