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With development of grid technology, sensitive data protection becomes a difficult task for accesses from heterogeneous domains. Moreover, anonymity and unknown peers worsen security problems. Traditional access control mechanisms are not suitable to distributed environment. Several models and mechanisms make use of trust evaluation to assist access control decision. But few explicitly consider trust...
With the development of grid technology, sensitive files and data protection become difficult tasks multi-domains. Traditional access control mechanisms are not suitable to such distributed environment. Several models and mechanisms utilize trust to assist access control decision. But few explicitly consider trust and risk as two separate factors which affect interactions between peers. In this paper,...
Usage control is a generalization of access control to cover obligations, conditions, continuity and mutability. However, the delegation component isn??t discussed to the full. In this paper, an improved scheme for delegation based on the usage control model is proposed. The new model is not just expanding the UCONABC model simply by increasing the delegation component as earlier literatures by Zhiyong...
In ubiquitous computing environment, resources become invisible, heterogeneous and anywhere. Traditional access control mechanism could not handle such dynamic and complex environment. In our proposed work, we view access control mechanism as a non-cooperative game. Thus, a game theoretic model for access control has been proposed to assist such mechanism. Different from traditional one, which depended...
Wavelet analysis has been used for studying dynamic behavior of fluidized beds, which proved effective in resolution of time series into different scales of components with distinct structure and in identification of transition from the dense phase to the dilute phase. By examining wavelet spectrum functions of various dynamic signals measured from fluidized beds, it is indicated that the signals...
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