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Fast and scalable pattern matching for content filtering

4 years 5 months ago
Fast and scalable pattern matching for content filtering
High-speed packet content inspection and filtering devices rely on a fast multi-pattern matching algorithm which is used to detect predefined keywords or signatures in the packets. Multi-pattern matching is known to require intensive memory accesses and is often a performance bottleneck. Hence specialized hardware-accelerated algorithms are being developed for line-speed packet processing. While several pattern matching algorithms have already been developed for such applications, we find that most of them suffer from scalability issues. To support a large number of patterns, the throughput is compromised or vice versa. We present a hardware-implementable pattern matching algorithm for content filtering applications, which is scalable in terms of speed, the number of patterns and the pattern length. We modify the classic Aho-Corasick algorithm to consider multiple characters at a time for higher throughput. Furthermore, we suppress a large fraction of memory accesses by using Bloo...
Sarang Dharmapurikar, John W. Lockwood
Added 26 Jun 2010
Updated 26 Jun 2010
Type Conference
Year 2005
Where ANCS
Authors Sarang Dharmapurikar, John W. Lockwood
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