Hardware Accelerated Pattern Matching Based on Deterministic Finite Automata with Perfect Hashing

Hardware Accelerated Pattern Matching Based on Deterministic Finite Automata with Perfect Hashing

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With the increased amount of data transferred by
computer networks, the amount of the malicious traffic also
increases and therefore it is necessary to protect networks
by security systems such as firewalls and Intrusion Detection
Systems (IDS) operating at multigigabit speeds. Pattern matching
is the time critical operation of current IDS. This paper deals
with the analysis of regular expressions used by modern IDS
to describe malicious traffic. According to our analysis, more
than 64 percent of regular expressions create Deterministic Finite
Automaton (DFA) with less than 20 percent of saturation of
the transition table which allows efficient implementation of
pattern matching into FPGA platform. We propose architecture
for fast pattern matching using perfect hashing suitable for
implementation into FPGA platform. The memory requirements
of presented architecture is closed to the theoretical minimum
for sparse transition tables.

With the increased amount of data transferred by
computer networks, the amount of the malicious traffic also
increases and therefore it is necessary to protect networks
by security systems such as firewalls and Intrusion Detection
Systems (IDS) operating at multigigabit speeds. Pattern matching
is the time critical operation of current IDS. This paper deals
with the analysis of regular expressions used by modern IDS
to describe malicious traffic. According to our analysis, more
than 64 percent of regular expressions create Deterministic Finite
Automaton (DFA) with less than 20 percent of saturation of
the transition table which allows efficient implementation of
pattern matching into FPGA platform. We propose architecture
for fast pattern matching using perfect hashing suitable for
implementation into FPGA platform. The memory requirements
of presented architecture is closed to the theoretical minimum
for sparse transition tables.

Intrusion Detection, Perfect Hashing,hardware acceleration, Deterministic Finite Automata

Intrusion Detection, Perfect Hashing,hardware acceleration, Deterministic Finite Automata

KAŠTIL, J.; KOŘENEK, J.

2011

19.04.2010

IEEE Computer Society

Vienna

978-1-4244-6610-8

Proceedings of the 13th IEEE International Symposium on Design and Diagnostics of Electronic Circuits and Systems DDECS 2010

149

152

4

https://www.fit.vut.cz/research/publication/9200/

05491796