Michael Piatek Tadayoshi Kohno Arvind Krishnamurthy Challenges and Directions for Monitoring P2P File Sharing Networks - or - Why My Printer Received a DMCA Takedown Notice. 2008 HotSec http://www.usenix.org/events/hotsec08/tech/full_papers/piatek/piatek.pdf conf/uss/2008hotsec db/conf/uss/hotsec2008.html#PiatekKK08