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With the development of web service technology, identifying and discovering the users with similar preferences have an important significance to service selection and service optimization in the service environment. In order to divide the users into groups based on their preference similarity in the process of service selection, a combination-based clustering algorithm, named AAK, is presented in...
The state-of-the-art downsampling method for graph signals has been constructed by using maximum spanning trees (MSTs) of the graphs. For the graph signals defined on unweighted densely connected graphs, such as social network data, the sampling rates via MST-based downsampling are not close to 1 over 2, leading to a unbalanced downsampling phenomenon on multi-level downsampling. The unbalance hinders...
Homomorphic encryption becomes one of the key components in many emerging applications, e.g., cloud computing, to achieve privacy-preserving data processing. However, one of the major drawbacks that precludes the widespread adoption of homomorphic encryption is the huge expansion of the ciphertext. This problem becomes even more severe when multimedia data (images/videos) are handled, as these files...
One of the obvious challenges in cloud environments is trust crisis and its influence on the development of cloud computing. This paper analyzes the similarities and differences between cloud computing and other distributed environments, proposes the concept of trust and three different directions of trust-oriented research in cloud environments. According to three directions of trust-oriented research,...
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