Research On Lightweight Security Protocol For Internet Of Things Perception Layer

In recent years,with the rapid development of the Internet of Things(Io T)technology,the security of its application systems has attracted much attention.Since the Internet of things information is acquired from the perception layer,and the terminal node of the perception layer is mainly composed of low-power and resource-limited sensor devices,the security protocol of traditional Internet resource-rich devices cannot be well applied to specific applications of the Internet of things system.Therefore,the security protocols of traditional Internet resource-rich devices cannot be applied to the specifics of the Io T system.At the same time,since the networking of the terminal node equipment of the Io T sensing layer mostly uses RFID and WSN systems,it is of great significance to design efficient and lightweight security protocols for these two systems.This thesis is to research the security protocols of RFID and WSN systems in the sensing layer of the Internet of Things.The main research results are as follows.Firstly,the communication between the RFID system tag and the reader is vulnerab le and the tag hardware resources are limited,and the existing ultra-lightweight protocols have different security vulnerabilities.An ultra-lightweight identity authentication protocol based on permutation matrix encryption(UPBPM)is proposed.The protocol is based on permutation matrix for encryption and decryption,and assigns different permutatio n matrices to each tag to solve the problem of the singularity of the encryption algorithm in the existing ultra-lightweight security authentication protocol.And resist desynchroniza t io n attacks by saving two rounds of authentication information;enhance the ability of the protocol to resist replay attacks by introducing random numbers.Secondly,aiming at the limitation of device resources and computing performance in wireless sensor networks,and the existing protocols have the problem of large calculat io n amount and cannot resist attacks such as DOS,a lightweight IPv6 address is designed for the WSN system under the 6Lo WPAN communication protocol(L6HOP)based on the idea of mobile target IPv6 network active security defense protocol(MT6D)address transitio n protocol.The L6 HOP protocol is an improvement on the MT6 D protocol,which enhances the security defense capability of the WSN system.At the same time,it uses a lightwe i ght hash algorithm to reduce CPU computing consumption.It also introduces a sliding address window to solve the problem of large packet loss rate of the MT6 D protocol communicat io n.Finally,the formal and non-formal theoretical analysis methods prove that the UPBPM protocol is safe and effective,and the simulation experiments prove that the UPBPM protocol has better security and privacy protection properties than the existing RFID security protocols,and it has a computational cost in the tag.Lower.For the L6 HOP protocol,it has been proved that the protocol has a good active security defense capability through formal analysis methods.By comparing with the MT6 D protocol through experiments,it is verif ied that L6 HOP has lower CPU consumption and higher communication efficiency on the premise of ensuring the security of WSN system.