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Cloud computing services have got rapid development in the field of the lightweight terminal, especially wireless communications. The comprehensive access control system framework is proposed for the cloud. A kind of access control scheme based on attribute encryption is designed, in which lightweight devices can safely use cloud computing resources to outsource encrypt/decrypt operations, and not...
Heath information exchange (HIE) is the next step of health informatics development in China. Conformed to the administration feature, the design of HIE platform adopts a centralized architecture, which has to accommodate large amount of health information and support various types of query and data retrieval. Cloud computing is a suitable for the technology requirements of centralized design. In...
In this paper, steganography methods on streaming cover data were modeled uniformly, and then a subliminal channel consisting of multiple methods was constructed. A channel coding with feedback was proposed for the reliability of transmission. This coding was not affected by whether the capacity of used methods was fixed or variant. Experiments showed that, with the same capacity utilization as former...
With the rapid development of WEB2.0, Internet forums have become an information exchanged platform where netizens can freely express their opinions. In Internet consensus environment, it is very important to appropriately control and lead the consensus and the opinion leaders play critical roles in Internet community. This paper, by combining the characteristics of Internet forums, established a...
This paper proposes a new approach based on the Histogram Shifting Algorithm (HSA) to reversible data hiding in bitmap image. The embedding is not carried out in the whole image but in small blocks in order to enhance the capacity. Firstly, the blocks are classified, and then, coding methods specific to each type of block are designed. Secondly, some blocks become unavailable for a second time embedding...
We improve Kleinberg's hierarchical small world network model to implement a peer-to-peer overlay network. In the overlay, all the nodes are treated as leaves which are uniformly distributed in a complete 2-ary tree, and the distance between nodes is defined as the height of their lowest common ancestor in the tree. Every node in the overlay is linked to at least one d-distance node if the d-distance...
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