@inproceedings{ Ahmad06a,
	author = "Waseem Ahmad and Ashfaq Khokhar",
	title = "A Secure aggregation in large scale overlay networks",
	booktitle = "Proceedings of IEEE Global Communications Conference (GLOBECOM'06)",
	year = "2006",
	pdfurl = "http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.60.9169\&rep=rep1\&type=pdf"
}