Data Transmission In Wsns Based On Ant Colony Optimization And Proxy Re-Encryption

Wireless sensor Network is composed of a large number of sensor nodes,which are randomly deployed in a specific area to monitor environment by wireless medium.WSNs are not dependent on any fixed facility.When in an unattended environment,sensor nodes can collect and aggregate comprehensive information in a timely manner.It covers a wide range of applications,including environmental monitoring,health care,national defense and military,agricultural production,smart home and other fields.However,WSN exists in an open and collaborative environment.There are many security loopholes in the network,so communication security faces a lot of threats and challenges.Therefore,it is of great significance to study the secure transmission of data in WSNs.WSN communication process is divided into two stages:data path selection stage and data encryption stage.By designing an ACOTPRE security policy deployed in these two stages,it can resist internal attacks and external attacks to ensure the transmission of data safely and efficiently.An ant colony optimization algorithm is used in the data path selection phase for network routing.The improvement of pheromone concentration is proposed,which is mainly divided into two aspects:on the one hand,the pheromone concentration factor is reconstructed to include the trust assessment model,the residual energy model and the node signal strength;on the other hand,the pheromone update strategy is improved by considering the average and minimum values of node energy and introducing an adaptive pheromone concentration volatility factor.Among them,in order to resist internal attack,the trust evaluation model is introduced to establish trust relationship based on packet behavior,which is one of the controlling factors of path selection.Compared with the traditional ant colony algorithm,the improved scheme fully considers the characteristics and requirements of WSN.Simulation experiments show that the proposed method can not only avoid malicious nodes in the network but also find the optimal data transmission path.Compared with the other method,the proposed method reduces network energy consumption to prolong network life cycle.The trust model can resist internal attacks but cannot against external attacks.In order to solve this problem,the proxy re-encryption algorithm is studied.Proxy reencryption is extended to WSNs in the data encryption phase.Threshold secret sharing algorithm is introduced to generate a re-encryption key fragment composed of a group of random numbers in the source node.The intermediate node in the network which is responsible for data forwarding performs the re-encryption operation as the proxy node to generate the second layer of key fragment,and the destination node calculates the Lagrange interpolation polynomial to restore the symmetric key.According to the threat model of WSN,the security analysis is conducted,which proves that the proposed method can defend network attacks effectively for safe transmission of data from the source node to the destination node.In summary,ACOTPRE is a security method to against internal and external attacks in WSN.It fully combines the characteristics of WSN.Theoretical analysis and simulation experiments show that ACOTPRE can effectively resist network attacks to improve the security of data transmission,and it performs well in the aspect of node energy consumption.