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E-commerce (EC) over open devices and networks poses security challenges of a new dimension. This article presents a multi-party contract signing (MPCS) protocol to demonstrate how to apply the secure EC protocols to trading terminals supported by trusted computing (TC) technology. The protocol here reduces the number of rounds to two and the message transmission number to O(n2), which is the best...
For improving the efficiency of human 3D tracking, we present an algorithm to track 3D arm motion. First, the hierarchy limb model (HLM) is proposed based on the human 3D skeleton model. Second, via graph decomposition, the arm motion state space, modeled by HLM, can be discomposed into two low dimension subspaces: root nodes and leaf nodes. Finally, Rao-Blackwellised particle filter is used to estimate...
Convenient, efficient and anonymous characteristic enables P2P network to own enormous users very quickly. However, how much service performance of searching and transmitting is provided by P2P network for a concrete resource? How much is the success ratio and recall ratio of resource's searching of existing P2P network? Rare research is deepened about those questions. This paper, for unstructured...
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