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This paper proposes a multi-thread based regular expression (regexp) matching algorithm, M-DFA (multithreaded DFA), for parallel computer architectures such as multi-core processors and graphic processing units (GPU). At the thread level, one thread is designated to traverse the DFA of a possible matching path until its termination, and at the task level multiple threads concurrently match each input...
Network-based intrusion detection systems (NIDS) commonly use pattern languages to identify packets of interest. Similarly, security information and event management (SIEM) systems rely on pattern languages for real-time analysis of security alerts and event logs. Both NIDS and SIEM systems use pattern languages extended from regular expressions. One such extension, the submatch construct, allows...
This paper takes advantage of the emerging multi-core computer architecture to design a general framework for mitigating network-based complexity attacks. In complexity attacks, an attacker carefully crafts “heavy” messages (or packets) such that each heavy message consumes substantially more resources than a normal message. Then, it sends a sufficient number of heavy messages to bring the system...
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