A New Key Pre-Distribution Scheme For Wireless Sensor Network

Since the development of wireless sensor network,it has been applied in many fields.The security of wireless sensor network has been paid more and more attention with the wide application of wireless sensor network.Only by ensuring the security of wireless sensor network,can we guarantee the accuracy of the information and ensure that the contents of the communication is not stolen.In view of the security problems faced by wireless sensor networks,such as the limited energy of sensor nodes,the vulnerability of wireless communication and the vulnerability of networks,it is necessary to take effective measures to deal with the security problems of wireless sensor networks.Key management,which is included in encryption technology,is a security mechanism often used in wireless sensor networks to deal with security problems,and has always been a hot topic in research.In this paper,the best data transmission mode in three-ring circular domain is studied,and based on this,a random key pre-distribution scheme based on binary symmetric multinomial is proposed to generate the key pool at the base station.Contains a certain number of binary symmetric Polynomials and corresponding identifiers,in which the same number of Polynomials are stored in each hop node,where a certain number of Polynomials are selected by the previous hop node from the Polynomials stored by itself.The other part of the polynomial is selected from the key pool,and the session key when the node communicates is generated by a one-way irreversible hash function,so that secure communication can be established with other nodes.It can also ensure that the storage key of each node is different,which increases the security of the network.(1)After studying the root of the energy black hole phenomenon,the optimal data transmission mode is analyzed when the transmission power of the sensor is adjustable in the three-ring circular domain,and a key management scheme is proposed based on this method.(2)The key parameters of the key management scheme are determined,including the total number of keys in the key pool of the base station,the number of the polynomials to be stored for each sensor,the number of the least same polynomial required by the two sensors to establish the secure communication,and the like.(3)The key management scheme proposed in this paper is analyzed in terms of security,energy saving,connectivity and scalability.