Moon Soo Young, Cho Tae Ho
College of Information and Communication Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea.
ScientificWorldJournal. 2014;2014:185156. doi: 10.1155/2014/185156. Epub 2014 Jul 17.
Authentication is an important security mechanism for detecting forged messages in a sensor network. Each cluster head (CH) in dynamic key distribution schemes forwards a key dissemination message that contains encrypted authentication keys within its cluster to next-hop nodes for the purpose of authentication. The forwarding path of the key dissemination message strongly affects the number of nodes to which the authentication keys in the message are actually distributed. We propose a routing method for the key dissemination messages to increase the number of nodes that obtain the authentication keys. In the proposed method, each node selects next-hop nodes to which the key dissemination message will be forwarded based on secret key indexes, the distance to the sink node, and the energy consumption of its neighbor nodes. The experimental results show that the proposed method can increase by 50-70% the number of nodes to which authentication keys in each cluster are distributed compared to geographic and energy-aware routing (GEAR). In addition, the proposed method can detect false reports earlier by using the distributed authentication keys, and it consumes less energy than GEAR when the false traffic ratio (FTR) is ≥ 10%.
认证是传感器网络中检测伪造消息的一种重要安全机制。在动态密钥分发方案中，每个簇头（CH）都会转发一条密钥分发消息，该消息在其簇内包含加密的认证密钥，用于向下一跳节点进行认证。密钥分发消息的转发路径会强烈影响消息中的认证密钥实际分发到的节点数量。我们提出一种用于密钥分发消息的路由方法，以增加获得认证密钥的节点数量。在所提出的方法中，每个节点根据秘密密钥索引、到汇聚节点的距离以及其邻居节点的能量消耗来选择将密钥分发消息转发到的下一跳节点。实验结果表明，与地理和能量感知路由（GEAR）相比，所提出的方法可使每个簇中认证密钥分发到的节点数量增加50%至70%。此外，所提出的方法可以通过使用分布式认证密钥更早地检测到虚假报告，并且当虚假流量比率（FTR）≥10%时，它比GEAR消耗的能量更少。
