Design And Implementation Of A New Key Management System For WSN Based On Smart Card

Wireless sensor network has irreplaceable advantages in industrial production, military intelligence, medical information and so on.People pay more attention to the security problems of WSN, otherwise the loss of information,such as message forgery, and serious consequences will be caused. Traditional network encryption/decryption,signature/verification process cannot be directly applied to wireless sensor network because of the need for more resource consumption. The base station or the nodes of wireless sensor network, generally have limited storage capacity, environmental sensing ability and operation ability, and the integrity of the information can not be guaranteed.How to use the limited resources to design a more efficient and secure wireless sensor network has been raised.This paper based on the analysis of the characteristics of wireless sensor network, security problems, and the asymmetric encryption algorithm.A new key management scheme for dynamic wireless sensor network had been designed. Scheme based on the key management protocol of ECC, compared with other asymmetric algorithm or the symmetric algorithm for the same security level, has the advantages of fast speed, the less memory, short key length and the ability of anti-attack. This paper put forward an advanced ECC algorithm for constrained environments, and designed of dynamic key management based on the scheme, which can meet the WSN dynamic demand, reduce the power consumption of the nodes, ensure safety in some environment; and analysed the validity of the system.