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JUCS - Journal of Universal Computer Science 19(16): 2453-2471
doi:
10.3217/jucs-019-16-2453
Received:
15 Jul 2013 | Approved:
27 Sep 2013 | Published:
01 Oct 2013
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Authors
Ting Cui 
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Information Science and Technology Institute, Zhengzhou, China
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Information Science and Technology Institute, Zhengzhou, China
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Science and Technology on Information Assurance Laboratory, Beijing, China
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Conflict of interest
The authors have declared that no competing interests exist.
This article is freely available under the J.UCS Open Content License.