中文摘要：

对一种基于DNA模型的传感器网络对密钥预分发方案进行分析,指出该方案具有较差的抗沦陷攻击能力。结合DNA模型和多密钥池的概念,提出一种扩展DNA模型对密钥预分发方案,将原DNA方案中变量的灰度由2级扩展到级,节点选择多条DNA链作为自己的密钥环,以某条DNA链中某段寡聚核苷酸对应的编码作为实际对偶密钥。讨论该方案密钥联通性的参数选择、安全性和开销,分析结果表明,该方案开销较低,且与原方案相比,安全性更高。

英文摘要：

A DNA model based pair-wise key establishment scheme is analyzed and the result shows that the resilience of the scheme is poor. Combining DNA model with the idea of multiple key pool, an extended DNA model based pair-wise key establishment scheme is proposed. The gray degree of the variable is changed form 2 to 60. The nodes select multi-DNA strands as its key ring and use the code of some oligonucleotide in some DNA strand as their actual pair-wise key. The key connectivity, security and overhead of the scheme are discussed. The analysis shows that the overhead of computation and communication of the new scheme is little and the security is greatly improved compared with the original DNA model scheme.