Ahoâ€“Corasick string matching algorithm
The Aho - Corasick algorithm is an algorithm based on the search strings and was developed by Alfred V. Aho and Margaret J. Corasick 1975.
The algorithm is a kind of dictionary Comparison, which compares a finite number of known patterns with input text. Simply put, the algorithm builds a finite state machine and compares it with the input text. If the signature is known in advance (for example, an anti -virus database ), then the installation may take place before the start of the off-line program and can be stored for later use.
The Aho - Corasick algorithm is fgrep the base of the UNIX commands, the Snort IDS and the WAF ModSecurity.
- Search algorithm