@InProceedings{ SIG11,
	author = "Stephan Sigg",
	title = "Context-based security: State of the art, open research topics and a case study",
	booktitle = "Proceedings of the 5th ACM International Workshop on Context-Awareness for Self-Managing Systems (CASEMANS 2011)",
	year = "2011",
	month = {September},
	ibrauthors = "sigg beigl",
	ibrgroups = "dus"
}