@conference{Sch07,
	author = {Schaffrath, Gregor},
	howpublished = {Research Group Retreat, Sonthofen, Germany},
	month = {aug},
	title = {Challenges in Distributed Intrusion Detection Systems},
	url = {http://www.csg.uzh.ch/publications/chall-slides-dids.pdf},
	year = {2007}
}