A novel stochastic-encryption-based P2P Digital Rights Management scheme

Digital right protection in P2P systems is attracting more and more attentions. In this paper, we present a new stochastic-encryption-based Digital Rights Management (DRM) scheme for P2P content delivery networks. The files are encrypted such that unpaid users cannot access the plaintext content. We exploit the random characteristics of P2P to increase the key space, which can defense collusion attacks. We add piece validation policy during a download process to prevent poisoning attacks. In our scheme, peers make a payment after downloading, and this prevents user loss due to download failures (caused by the dynamics of P2P). Our scheme does not have frequent user authentications or state maintenance. Analysis and simulation experiments show that our scheme can defend against collusion attacks and poisoning attacks with a fairly high probability.

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