Preserving Peer Replicas By Rate-Limited Sampled Voting

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  • 27 March 2003
Abstract
The LOCKSS project has developed and deployed in a world-wide test a peer-to-peer system for preserving access to journals and other archival information published on the Web. It consists of a large number of independent, low-cost, persistent web caches that cooperate to detect and repair damage to their content by voting in ``opinion polls.'' Based on this experience, we present a design for and simulations of a novel protocol for voting in systems of this kind. It incorporates rate limitation and intrusion detection in new ways that ensure even an adversary capable of unlimited effort over decades has only a small probability of causing irrecoverable damage before being detected.

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