If this trend continues, effectiveness of DPI for enforcement can be significantly hindered. Using behavioral classifiers that we implemented and that can detect encrypted BitTorrent from traffic summaries, we found students shifting from unencrypted to encrypted BitTorrent in the 2007-2008 academic year. However, limitations such as not being able to detect users of encrypted P2P can reduce DPIʼs effectiveness in the long term. In the short term, DPI could be effective to assess which network users transfer copyrighted content using P2P given some weeks of monitoring. Focusing on effectiveness of DPI, after a couple weeks of monitoring DPI found up to 80% of detected P2P users attempting to transfer copyrighted content. This indicates that copyright law is violated frequently using P2P, and while we cannot quantify how P2P transfers translate to lost sales, it is reasonable to assume some sales are lost due to P2P. We found no evidence that use of P2P to transfer content without violating copyright was common both on campus and global BitTorrent. Most transfers were from a small number of very popular titles that were widely available for sale. In late 2010, we estimate that over 800 million copies of content were transferred globally using BitTorrent per day, with an estimated number of transferred songs 13.1 times greater than worldwide sales of songs, and estimated number of transferred movies 6.8 times greater than worldwide box-office sales and 16.4 times greater than U.S. In Spring 2008, 40% of students living on campus were detected using a P2P protocol, 70% of which were observed attempting to transfer copyrighted material. Use of P2P and transfers of copyrighted content were widespread on campus. This research uses data collected from a university campus network via Deep Packet Inspection (DPI) monitoring and from the largest public BitTorrent tracker to characterize the extent of unauthorized transfers of copyrighted content using Peer-to-Peer (P2P) and to evaluate the effectiveness and limitations of DPI in detection of such activity, both to provide a perspective of how much copyright infringement happens using P2P and to inform those seeking to deploy DPI technology. We also show that BT-World can shed light on BitTorrent phenomena, such as the presence of spam trackers and giant swarms. We demonstrate the viability of our architecture by deploying it in practice, to observe and analyze one week of operation of a large part of the global BitTorrent network-over 10 million swarms and tens of millions of concurrent users. Third, BTWorld is designed to pre-process the large volumes of recorded data for later analysis. Second, by observing the state of these trackers, BTWorld obtains information about the performance, scalability, and reliability of BitTorrent. First, our architecture is able to find public trackers, that is, the BitTorrent components that offer unrestricted service to peers around the world. We design BTWorld around three main features specific to BitTorrent measurements.
To address this challenge, in this work we introduce BT-World, an architecture for observing the global BitTorrent network without help from the ISPs. Despite a large number of empirical and theoretical studies, observing the state of the global BitTorrent network remains a grand challenge for the BitTorrent community.
That’s all for now, stay tuned for further updates! Release 1.Today, the BitTorrent Peer-to-Peer file-sharing network is one of the largest Internet applications-it generates massive traffic volumes, it is deployed in thousands of independent communities, and it serves millions of unique users worldwide. Everything listed below is already finished and working, so it should not be viewed as a plan, but rather a checklist of stuff for me to verify and include into the final assembly. Lyrics aside, today I’d like to outline the scope for the upcoming release. Though it’s a merely mechanical work for the most part, so the future looks bright to me. There are still a couple of things left, mostly related to API stabilization and overall cleanup, as well as creating some kind of documentation. I’ve been working on Bt for more than half a year now, and I’m delighted to say that it’s gradually approaching its’ first official release.
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