传感器网络中基于DNA模型的对偶密钥建立算法研究

在KDC(Key Distribution Center)和DNA多样性的基础上,提出了一种用于密钥预置的DNA模型及其密钥预置(Key Predistribution)机制,然后,在结合密钥池(Key Pool)加密技术优点的基础上,提出了一种传感器网络中基于DNA模型的新对偶密钥建立算法.新算法利用DNA链中寡聚核苷酸编码特性进行密钥预置,任意节点对之间以DNA链进行信息交换,而以DNA链中包含的某段寡聚核苷酸对应的编码作为实际对偶密钥.理论与实验分析表明,与基于多项式、多项式池的密钥预置模型的对偶密钥建立算法相比,新算法具有更好的安全性能,更低的通信开销、以及更高的直接对偶密钥建立概率.因此,是一种更适合传感器网络特点的新型高效对偶密钥建立算法.

Researches on DNA Model Based Algorithm of Establishment of Pairwise Key for Sensor Networks

On the basis of KDC (key distribution center)and diversity of DNA molecules,an innovative DNA model for key predistribution and key predistribution scheme based on the new DNA model are proposed.And in addition,by combing with the good characteristics of key pool,a novel DNA model based pairwise key establishment algorithm is presented for distributed sensor networks,which uses characteristics of the code of oligonucleotides in DNA strands for key predistribution,and in which,any pair of nodes exchange DNA strands information and use the code of some oligonucleotide in the DNA strand as their actual pairwise key.Theoretical and experimental analyses show that,compared with those previous well-known polynomial-based and polynomial pool-based key predistribution models and pairwise key establishment algorithms,the newly proposed algorithm has better security,lower communication costs and higher probability of direct pairwise key establishment.So,it is a better and more efficient new pairwise key establishment algorithm suitable for distributed sensor networks.