The increasing amount of network throughput and security threat makes intrusion detection a major research problem. In the literature, intrusion detection has been approached by either a hardware or software technique. This paper reviews and compares hardware based techniques that are commonly used in intrusion detection systems with a special emphasis on modern hardware platforms such as FPGA, GPU, many-core processors and ASIC. It also provides a detailed comparison between these hardware

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... tion platforms. Our approach to classify modern hardware-based Intrusion Detection System (IDS) techniques is based on the detection approach. In addition, we provide a comparison between the classified detection approaches based on essential criteria such as definition, update process, detection ability, features of the system, and implementation requirements. Finally, a classification tree of hardware-based NIDS platforms is given.