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ABSTRACTAs computing becomes increasingly pervasive, di erent heterogeneous networks are connected and integrated. is is especially true in the Internet of ings (IoT) and Wireless Sensor Networks (WSN) se ings. However, as di erent networks managed by di erent parties and with di erent security requirements are integrated, security becomes a primary concern. WSN nodes, in particular, are o en deployed "in the open", where a potential a acker can gain physical access to the device. As nodes can be deployed in hostile or di cult scenarios, such as military ba le elds or disaster recovery se ings, it is crucial to avoid escalation from successful a acks on a single node to the whole network, and from there to other connected networks. It is therefore crucial to secure the communication within the WSN, and in particular, maintain context information, such as the network topology and the location and identity of base stations (which collect data gathered by the sensors) private.In this paper, we propose a protocol achieving anonymous routing between di erent interconnected IoT or WSN networks, based on the Spatial Bloom Filter (SBF) data structure. e protocol enables communications between the nodes through the use of anonymous identi ers, thus hiding the location and identity of the nodes within the network. e proposed routing strategy preserves context privacy, and prevents adversaries from learning the network structure and topology, as routing information is encrypted using a homomorphic encryption scheme, and computed only in the encrypted domain. Preserving context privacy is crucial in preventing adversaries from gaining valuable network information from a successful a acks on a single node of the network, and reduces the potential for a ack escalation.
CCS CONCEPTS•Security and privacy →Network security; Embedded systems security;Permission to make digital