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Due to lack of a central management, wide-area distributed systems are severely threatened by a variety of malicious users in today's Internet. Current reputation-based and anonymity technologies for node communication enhance system security. However, most of these methods gain security at the cost of efficiency degradation. On the other hand, many technologies that aim to improve system efficiency neglect malicious participants in the system. This paper presents a P2P-based security/efficiency-optimized infrastructure for node communication. The infrastructure jointly treats security and efficiency in its operation to meet the high performance requirements of wide-area distributed systems.
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