DTMSN中的分布式密钥更新模型

Distributed Key Updating Model in Delay Tolerant Mobile Sensor Networks(DTMSN)

为了解决容延迟移动传感器网络中密钥更新过程中密钥分发延迟不确定的问题,保证分发过程中新密钥的安全性,提出了一种分布式密钥更新模型。该模型使用密钥分片机制,将新密钥分片预先置入网络中移动节点中,当密钥更新开始后,节点与网络内其他节点相遇后可获取自己的密钥片,多个密钥片组合后生成自己的新密钥。针对该模型的安全性和性能分析表明,通过对密钥分片数量的调整,该模型可以满足用户对分发过程中不同安全性要求和不同网络资源消耗要求。仿真结果表明该模型能够在不同网络参数变化的条件下对更新延迟做出比较准确的估计,解决了密钥分发延迟不确定的问题。

To solve the problem of the distribution uncertainty delay of key updating scheme in delay tolerant mobile sensor networks and guarantee the safety during key updating process, a distribution key updating model was proposed for DTMSN. In this model, a key was divided into multiple components, with each component carried by a separate node, and could be reconstructed by its owner node after the owner has a contact with these escrow nodes. The analysis of safety and performance for this model illuminated that this model can satisfy the various requirements on safety and resource cost by adapting the shadow number. The simulation results verified that this model can estimate the latency of key distribution process.