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Regular Expressions

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Three generations of attack detection methodology The oldest and well-studied approach is based on signatures and heuristics. From before the internet times, this approach was implemented in most kinds of detection systems from firewalls to anti-viruses. The second genera- tion represents an improvement over the regular expression-based signatures by replacing them with specific parsers or tokenizers. As a third generation solution, we have decided to dive deeper into the examples of attacks that can and…