NDLI: Creating the Cryptograph Index by Query Frequencies in DAS Models

Content Provider	IEEE Xplore Digital Library
Author	Danfeng Zhao Wei Zhao Ying Wang Feng Gao Qi He Guohua Liu
Copyright Year	2009
Abstract	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 data in database, which can be used for achieving higher cryptograph query efficiency. In this paper, we first present a novel cryptograph index strategy that employs actual query frequency in bucket partition method. Such a strategy can significantly reduce the number of wrong hit tuples and hence improve query efficiency. Second, a query rewrite technique is proposed for our cryptograph index strategy to translate original queries into queries over cryptograph with the help of metadata for index. An example from real world is given to illustrate the higher performance of our query frequency based strategy than widely used equi-depth bucket partition method.
Starting Page	483
Ending Page	487
File Size	366504
Page Count	5
File Format	PDF
ISBN	9781424454112
e-ISBN	9781424454129
DOI	10.1109/CIS.2009.88
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-12-11
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	query rewrite wrong hit tuple DAS models Data security Educational institutions Electronic mail Indexes cryptograph index Information science Databases Information security Frequency query frequency Cryptography Computational intelligence
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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