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Zhang Y.,National Laboratory for Parallel and Distributed Processing PDL | Zhang Y.,National University of Defense Technology | Lu X.,National Laboratory for Parallel and Distributed Processing PDL | Lu X.,National University of Defense Technology | And 2 more authors.
Science in China, Series F: Information Sciences | Year: 2010

With the rapid development of computing and networking technologies, people propose to build harmonious, trusted and transparent Internet-based virtual computing environments (iVCE). The overlay-based organization of dynamic Internet resources is an important approach for iVCE to realizing efficient resource sharing. DHT-based overlays are scalable, low-latency and highly available; however, the current DHT overlay (SKY) in iVCE cannot satisfy the "trust" requirements of Internet applications. To address this problem, in this paper we modify SKY and propose TrustedSKY, an embedded DHT overlay technique in iVCE which supports applications to select trusted nodes to form a "trusted subgroup" in the base overlay and realize secure and trusted DHT routing. © 2010 Science China Press and Springer-Verlag Berlin Heidelberg. Source


Zhang Y.,National Laboratory for Parallel and Distributed Processing PDL | Zhang Y.,National University of Defense Technology | Lu X.,National Laboratory for Parallel and Distributed Processing PDL | Lu X.,National University of Defense Technology | And 2 more authors.
Science China Information Sciences | Year: 2011

The Internet-based virtual computing environment (iVCE) is a novel network computing platform. The characteristics of growth, autonomy, and diversity of Internet resources present great challenges to resource sharing in iVCE. The DHT overlay (DHT for short) technique has various advantages such as high scalability, low latency, and desirable availability, and is thus an important approach to realizing efficient resource sharing. Topology construction is a key technique for structured overlays that realizes basic overlay functions including dynamic maintenance and message routing. In this paper, we first introduce the traditional techniques of DHT topology construction, focusing mainly on dynamic maintenance and message routing of typical DHTs, DHT indexing techniques for complex queries, and DHT grouping techniques for matching domain structures. We then present recent advances in DHT topology construction techniques in iVCE taking advantage of the characteristics of Internet resources. Finally, we discuss the future of DHT topology construction techniques. © 2011 Science China Press and Springer-Verlag Berlin Heidelberg. Source

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