A cryptography index technology and method to measure information disclosure in the DAS model

Authors:
Zhao Wei;Zhao Dan-Feng;Gao Feng;Liu Guo-Hua
Affiliations:
College of Information Science and Engineering, Yanshan University, Hebei, China and Harbin Power Supply Bureau Information Centre, Harbin, Heilongjiang, China;College of Information Science and Engineering, Yanshan University, Hebei, China;College of Information Science and Engineering, Fudan University, Shanghai, China;College of Information Science and Engineering, Yanshan University, Hebei, China
Venue:
WSEAS Transactions on Information Science and Applications
Year:
2009

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Abstract

Database-as-a-Service model is a new data management model which allow user to store their data at database service provider. In DAS model, data is stored in cryptograph form, so it will spend long time to query data. In order to improve cryptograph query efficiency, a cryptograph index strategy adapting to unequal-probability query is presented. Then, definitions of disclosure coefficient are presented focus on the problem of the information disclosure in cryptograph indices. Finally, the conclusion is analyzed and validated by experiments.