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Many Network-based Intrusion Detection Systems (NIDSs) are developed till now to respond these network attacks. As network technology presses forward, Gigabit Ethernet has become the actual standard for large network installations. Therefore, software solutions in developing high-speed NIDSs are increasingly impractical. It thus appears well motivated to investigate the hardware-based solutions. Although several solutions have been proposed recently, finding an efficient solution is considered as a difficult problem due to the limitations in resources such as a small memory size, as well as the growing link speed. Therefore, the authors propose the FPGA-based intrusion detection technique to detect and respond variant attacks on high-speed links. It was designed to fully exploit hardware parallelism to achieve real-time packet inspection, to require a small memory for storing signature.
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