| Opportunistic network,as one of the most rapidly developed technologies in mobile network technology,has attracted wide attention from academia and industry,making it increasingly widely applied in smart cities,field visits,disaster relief assistance and battlefield communications.However,due to the exposure and instability of opportunistic networks,opportunistic networks face more serious security problems than traditional networks.Aiming at the serious security problems of delete attack and resource consumption attack,in this paper,we design opportunistic routing from the perspective of data security and node security.The main contents of the paper contain:A probabilistic opportunistic routing based on security collaboration evaluation(SCEPOR)is proposed.Firstly,the delete attack model is established in ONE simulation platform by analyzing the delete attack behavior of malicious nodes.Secondly,the routing is designed considering the factors of communication security and network performance.The node directly evaluates the cooperative security of relay nodes in the communication range,and receives the reference evaluation from the other nodes as the indirect trust values,and those comprehensive trust values as the basis for security evaluation.In terms of the routing performance,relying on the record of the encounter information of the node itself,the utility ratio of effective contact time is used to improve the update method of the contact probability between nodes,and the packet forwarding is carried out based on the effective contact probability between nodes.Finally,the forwarding relay ratio security threshold is determined through experiments.Under the same intensity of deletion attack scenario,we can get simulations by different opportunistic routing algorithms,and compared with the proposed SCEPOR in the paper.The simulation results show that the SCEPOR algorithm performs better.It possesses higher packet delivery rate and lower average end-to-end delay,and achieves efficient packet delivery.Further,aiming at the security problem of resource consumption attacks faced by network nodes,a probabilistic opportunistic routing based on security assessment and management(SAMPOR)is proposed.Firstly,based on the existing delete attack model,the resource consumption attack model is expanded and created.Secondly,the node and packet management mechanism are added on the basis of SCEPOR algorithm to realize the management of malicious nodes,invalid packets and effective packets in the network,and the overall process of SAMPOR algorithm is designed.Finally,the comparative simulation experiment of routing performance under different intensity of resource consumption attacks is completed.The simulation results verify that the proposed SAMPOR algorithm not only has inhibitory effect on the delete attack of packets,but also maintains good performance on the resource consumption attack initiated by network nodes. |
