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Database-as-a-Service(DAS)model is a new data management model which allow users to store their data at database service providers. Since data is stored in cryptograph form, the cryptograph index is a trade-off method to reduce the query time. So far, existing methods for creating cryptograph index ignore important statistical information of voluminous historical queries: query frequency of particular...
How to improve query efficiency in cryptograph database is an essential problem in database encryption technology. As one kind of methods for improving cryptograph query efficiency in database, existing cryptograph index technologies suffer from two main problems: low query hit rate and lack of information disclosure measures. In this paper, we propose a new cryptograph index method based on the probability...
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