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Advancements in cloud computing are leading to a promising future for collaborative cloud computing (CCC), where globally-scattered distributed cloud resources belonging to different organizations or individuals (i.e., entities) are collectively used in a cooperative manner to provide services. Due to the autonomous features of entities in CCC, the issues of resource management and reputation management...
DHT-based peer-to-peer networks represent a particular environment with specific security problems. Some types of malicious activity in this kind of networks can cause the same problems as Byzantine failure in distributed computer systems. In this work we propose to integrate solutions for Byzantine Agreement (BA) used in distributed computing environment and reputation mechanisms designed for P2P...
Distributed hash tables (DHT) was not designed to be secure against malicious users. But some secure systems like trust and reputation management algorithms trust DHT with their data. Several propositions have been made to make DHTs appear secure but they fail in practice. We review some of those propositions and explain why they do not work. Our main conclusion is that DHT should not be used to create...
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