We present a multi-gigabit rate multiple pattern-matching algorithm with TCAM that enables protecting against malicious attacks in a high-speed network. The proposed algorithm significantly reduces the number of TCAM lookups per payload with m-byte jumping window scheme. Due to the reduced number of TCAM lookups, we can easily achieve multi-gigabit rate for scanning the packet payload in order to inspect the content. Furthermore, multipacket inspection is achieved easily by the extended state transition diagram with the shifting distance. With experimental results, we have clearly justified the proposed algorithm works well for a multi-gigabit network intrusion detection system.
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