Modern peer-to-peer systems rely heavily on the willingness of users to distribute files to their peers. A selfish user can choose to download a file and consume resources without uploading in return. This form of free-riding plagues all currently deployed systems. We present a protocol for a BitTorrent-like system (i.e., in which only one file is being shared) that strongly discourages peers f...

Though a few previous research efforts have investigated the peer availability of P2P systems, the understanding of peer dynamic is far from adequate. Based on the running log of a file-sharing P2P system, we produced a more thorough measurement of the dynamic natures of P2P system. We further show that due to the methodology limitation, crawler based measurement can not precisely capture syste...

Temporal networks encode interactions between entities as well as the time at which the interactions took place, allowing us to identify systematic processes within the network. We can identify subprocesses or temporal motifs that recur frequently across a large network. In this paper, we present a strategy that allows us to identify which of a given set of temporal processes are over-represent...