IDS systems using FSM technique

http://www.springerlink.com/content/g25w816354413354/fulltext.pdf

http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4285750 (A Memory-Efficient Reconfigurable Aho-Corasick FSM Implementation for Intrusion Detection Systems)

http://opensiuc.lib.siu.edu/cgi/viewcontent.cgi?article=1009&context=ece_articles (Self-Addressable Memory-Based FSM: A Scalable Intrusion Detection Engine)