At present, many types of applications rely on wireless sensor networks because of their availability and advantages. The working environments of the wireless sensor networks are usually hostile and difficult to access because the sensor nodes are distributed randomly to their environments. Due to the random distribution of the sensor nodes, none of these nodes can authenticate the other sensor nodes within their range. Therefore, these sensor nodes need a key agreement scheme that allows them to establish secure communication with one another, hence protecting the communicating information before being conveyed to the base station. This paper proposes a new and efficient key management scheme for wireless sensor network based on the polynomial pool-based key pre-distribution scheme and the block LU decomposition algorithm. The proposed scheme ensures that any two communicating nodes must share a common key before communication starts. The performance of the proposed scheme is evaluated based on network connectivity, resilience against node capture, memory overhead, energy consumption and the number of Sybil nodes and the messages needed by the adversary to break the entire network. Therefore, a simulation-based evaluation was conducted, and the simulation results were compared with related works. The simulation results show that the proposed scheme performs better compared to the existing approaches. The BLU-decomposition algorithm allows the proposed approach to use more than one space to obtain the shared keys and decrease the amount of pre-distributed information to the sensor nodes.

中文翻译：

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无线传感器网络中使用块LU分解的密钥预分配方法

当前，许多类型的应用由于其可用性和优势而依赖于无线传感器网络。无线传感器网络的工作环境通常是敌对的，难以访问，因为传感器节点随机分布在其环境中。由于传感器节点的随机分布，这些节点中的任何一个都无法认证其范围内的其他传感器节点。因此，这些传感器节点需要一种密钥协商方案，该方案允许它们彼此建立安全的通信，从而在将通信信息传送到基站之前对其进行保护。提出了一种基于多项式池的密钥预分配方案和块LU分解算法的无线传感器网络密钥管理新方案。所提出的方案确保在通信开始之前任何两个通信节点必须共享一个公共密钥。基于网络连接性，针对节点捕获的恢复能力，内存开销，能耗以及Sybil节点的数量以及对手破坏整个网络所需的消息，来评估所提出方案的性能。因此，进行了基于仿真的评估，并将仿真结果与相关工作进行了比较。仿真结果表明，与现有方案相比，该方案具有更好的性能。BLU分解算法允许所提出的方法使用一个以上的空间来获取共享密钥并减少预分配给传感器节点的信息量。