@InProceedings{YaPeSo2003,
  author = 		 {Avi Yaar and Adrian Perrig and Dawn Song},
  title = 		 {Pi: A Path Identification Mechanism to Defend against {DDoS} Attacks},
  booktitle =	 {IEEE Symposium on Security and Privacy},
  year =		 2003,
  month =		 may,
  online =       {http://www.ece.cmu.edu/~adrian/projects/pi.ps},
  added-by =	 {adrian},
  added-at =	 {Tue Jan 28 22:28:13 2003}
}