A Secure and Legal Network-Aware P2P VoD System

File sharing applications using Peer-to-Peer (P2P) networks such as Bittorrent or eDonkey rapidly attracted a lot of people and proved the efficiency and interest of this P2P technology. Distribution of video and of live contents also experienced the P2P mechanisms with success. PPLive, UUSee and others have many of customers, hundreds of channels and thousands of concurrent users. However, major content providers are reluctant to use this technology because no solution to ensure the distribution of only legal contents is provided. In the same way, network operators do not really push towards P2P content distribution because bad organization of the overlay can lead to overload the network and consume a lot of networks resources. In this paper, a secure and legal network-aware P2P video system is introduced, which aims at overcoming those two drawbacks. The design of the system and the evaluation of a prototype showed good results and let us be optimistic about a possible deployment of P2P systems for video delivery, having the support of content providers as well as network operators.