The Internet of Things (IoT) environment comprises large scale deployment of constrained devices like RFIDs and sensors making routing an essential requirement. These constrained devices are part of the Low power and Lossy Networks (LLNs) in the IoT. The Internet Engineering Task Force standardized IPv6 Routing Protocol for Low power and Lossy Networks (RPL) as the routing protocol for LLNs in IoT. IoT-LLNs are organized as multiple Destination Oriented Directed Acyclic Graphs (DODAGs). The root node in the DODAG organizes and maintains the DODAG through broadcast based configuration information dissemination process. The root node also connects the various nodes in the DODAG to the rest of the IoT network. Hence, for any node in the IoT-LLN, connectivity with the root node is important. We present a novel Network Partitioning Attack (NPA) scenario against RPL in IoT-LLNs wherein a malicious node segregates a section of the IoT-LLN from the root node and thus from the rest of the IoT network. In this paper, we discuss in-depth the vulnerabilities of RPL, which result in the proposed Network Partitioning Attack. We present an analytical model to demonstrate the impact of the attack on the performance of the routing protocol and validate the model through simulation. We also suggest mechanisms to mitigate the attack.

物联网 (IoT) 环境包括 RFID 和传感器等受限设备的大规模部署，这使得路由成为一项基本要求。这些受限设备是物联网中低功耗和有损网络 (LLN) 的一部分。互联网工程任务组将低功耗和有损网络 (RPL) 的 IPv6 路由协议标准化为物联网中 LLN 的路由协议。IoT-LLN 被组织为多个面向目标的有向无环图 (DODAG)。DODAG 中的根节点通过基于广播的配置信息发布过程来组织和维护 DODAG。根节点还将 DODAG 中的各个节点连接到物联网网络的其余部分。因此，对于 IoT-LLN 中的任何节点，与根节点的连接都很重要。我们提出了一种针对 IoT-LLN 中 RPL 的新型网络分区攻击 (NPA) 场景，其中恶意节点将 IoT-LLN 的一部分与根节点以及 IoT 网络的其余部分隔离开来。在本文中，我们深入讨论了 RPL 的漏洞，这些漏洞导致了提议的网络分区攻击。我们提出了一个分析模型来证明攻击对路由协议性能的影响，并通过仿真验证模型。我们还建议减轻攻击的机制。我们提出了一个分析模型来证明攻击对路由协议性能的影响，并通过仿真验证模型。我们还建议减轻攻击的机制。我们提出了一个分析模型来证明攻击对路由协议性能的影响，并通过仿真验证模型。我们还建议减轻攻击的机制。