Research On Energy Depletion Optimization And Anti-energy Depletion Attack Method Based On SD-SWSN

With the continuous development and maturity of 5G technology,Wireless Sensor Networks(WSNs)will be more widely used in our lives.Although WSNs has brought convenience to all aspects of our lives,WSNs still have various problems,such as network life issues,network security issues and so on.These problems are particularly prominent in large-scale WSNs composed of hundreds or thousands of nodes,which severely hinders the wide application of WSN.This thesis takes a small network composed of several nodes as an example,optimizes the energy depletion of each node in WSNs to prlong the life of the network,further discusses the security issues faced by the proposed scheme,and improves the security issues.The specific research work is as follows:(1)Aiming at the imbalance of energy depletion faced by small WSNs,an energy depletion optimization model based on Software Defined-Security WSN(SD-SWSN)is proposed.First,the problem of unbalanced energy depletion in small WSNs is analyzed.Then,the deployment position of the relay node in the network is optimized according to the energy depletion.Through mathematical induction calculation of the network routing mode,a relay location optimization model is proposed,and the optimal deployment location of the relay node is solved.Third,introduce Software Defined Network(SDN)into the network,allowing users to manage the network according to custom policies.Finally,design simulation experiments for the proposed energy depletion optimization model to verify the effectiveness of the model.The experimental results show that the energy depletion optimization method based on SD-SWSN proposed in this thsis can effectively extend the lifetime of WSNs networks,and can extend the network lifetime by up to 57.1% under hypothetical experimental conditions.(2)In response to security threats such as energy depletion attacks that may appear in SD-SWSN,the HMAC-based lightweight authentication protocol is improved.First,the security threats faced in SD-SWSN are analyzed.Then,the security authentication protocol of Zhang et al.was improved,and the Message Authentication Code(HMAC)based on the hash function was introduced into the protocol,allowing network nodes to verify the HMAC to determine whether the source of the message is reliable,effectively preventing attacks methods such as man-in-the-middle,replay,and malicious energy depletion implemented by the attacker.Third,methods such as hash function and XOR operation are used in the security protocol to reduce network overhead.By comparing the calculation,storage and communication overhead in different methods,it is shown that the improved protocol has lightweight characteristics.Finally,the security protocol analysis tool AVISPA(Automated Validation of Internet Security Protocols and Applications)is used to analyze the security of the smart card authentication phase,key distribution and node authentication phase.Experimental results show that the lightweight authentication protocol proposed in this thsis is safe under the conditions required by the protocol.The method proposed in this depletion effectively solves the problem of unbalanced energy depletion in small networks,and designs corresponding security strategies to solve the security problems caused by the proposed energy depletion optimization scheme.This thesis has 24 figures,8 tables and 90 references.