The use of P2P networks for multimedia distribution has spread out globally in recent years.
Therefore, there is a strong need for a content distribution mechanism over P2P networks that do not pose security and privacy threats to the copyright holders or to end users, respectively. The existent systems for copyright and privacy protection employ cryptographic mechanisms at a cost of high computational burden which makes these systems impractical for distributing large files. In this presentation, the authors (Amna Qureshi, David Megías, Helena Rifà-Pous) propose and analyse a P2P content distribution system which allows efficient distribution of large-sized content while preserving the security and privacy of merchants and buyers, respectively. The experimental results confirm that the framework provides an efficient solution to copyright infringement issues over P2P networks, while protecting the end users’ privacy.