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A large variety of content sharing applications rely, at least partially, on gossip-based dissemination protocols. However, these protocols are subject to various types of faults, among which selfish behaviours performed by nodes that benefit from the system without contributing their fair share to it. Accountability mechanisms (e.g., PeerReview, AVMs, FullReview), which require that nodes log their...
Gossip-based content dissemination protocols are a scalable and cheap alternative to centralized content sharing systems. However, it is well known that these protocols suffer from rational nodes, i.e., nodes that aim at downloading the content without contributing their fair share to the system. While the problem of rational nodes that act individually has been well addressed in the literature, colluding...
Distributed Hash-Tables (DHTs) provide an efficient way to store objects in large-scale peer-to-peer systems. To guarantee that objects are reliably stored, DHTs rely on replication. Several replication strategies have been proposed in the last years. The most efficient ones use predictions about the availability of nodes to reduce the number of object migrations that need to be performed: objects...
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