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With increasing integration in SoCs, the Network-on-Chip (NoC) connecting of cores and accelerators is of paramount importance to provide low-latency and high-throughput communication. Due to limits of scaling of electrical wires, especially for long multi-mm distances on-chip, alternate technologies such as Wireless NoC (WNoC) have shown promise. Since WNoCs can provide low-latency one-hop transfers across the entire chip, there has been a recent surge in research demonstrating their performance and energy benefits. However, little to no work has studied the additional security challenges that are unique to WNoCs. In this work, we study the potential threat of spoofing a ttacks i n W NoCs d ue to malicious hardware trojans. We introduce Veritas, a drop-in solution aimed at detecting and correcting such spoofing attacks. To this end, our solution exploits the static propagation environment of WNoCs to associate each node to a power profile. W e d emonstrate t hat, w ith s mall a rea and power overheads, Veritas works well in a variety of settings.

Data centers are becoming increasingly popular for their flexibility and processing capabilities in the modern computing environment. They are managed by a single entity (administrator) and allow dynamic resource provisioning, performance optimization as well as efficient utilization of available resources. Each data center consists of massive compute, network and storage resources connected with physical wires. The large scale nature of data centers requires careful planning of compute, storage, network nodes, interconnection as well as inter-communication for their effective and efficient operations. In this paper, we present a comprehensive survey and taxonomy of network topologies either used in commercial data centers, or proposed by researchers working in this space. We also compare and evaluate some of those topologies using mininet as well as gem5 simulator for different traffic patterns, based on various metrics including throughput, latency and bisection bandwidth.

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