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Distributed object search is the primary function of peer-to-peer (P2P) file sharing system to locate and transfer the file. The predominant search schemes in unstructured P2P systems have their problems: flooding creates excessive traffic overhead and random walk prolongs search delay. Moreover, both use uniform time-to-live (TTL) control for all users, which makes them vulnerable to selfish user...
The indexing of complex data and similarity search plays an important role in many application areas. Traditional centralized index structure can not scale with the rapid proliferation of data volume. In this paper, we propose a scalable index architecture built on top of distributed hash tables (DHT), to support similarity search in the general metric space. Based on efficient space mapping and query...
One hurdle to using peer-to-peer networks as anonymizing networks is churn. Node churn makes anonymous paths fragile and short-lived: failures of a relay node disrupt the path, resulting in message loss and communication failures. To make anonymous routing resilient to node failures, we take two steps: (1) we use a simple yet powerful idea based on message redundancy by erasure coding and path redundancy...
Internet cycle sharing systems that utilize idle computing resources dramatically increase the available resources for high performance computing. Fraudulent resource providers, however, can subvert these systems. While previous research has investigated protection against resource providers that return bad results, we consider a different fraudulent behavior - cycle short-changing - in which the...
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