By Md. Sadim Mahmud, Sylvia L. Osborn (auth.), Willem Jonker, Milan Petković (eds.)
This booklet constitutes the refereed court cases of the ninth VLDB Workshop on safe facts administration held in Istanbul, Turkey, in August 27, 2012.
The 12 revised complete papers provided have been conscientiously reviewed and chosen from 22 submissions. The papers are geared up in topical sections on privateness safety, entry regulate, safe garage at the cloud, and belief at the Web.
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Extra info for Secure Data Management: 9th VLDB Workshop, SDM 2012, Istanbul, Turkey, August 27, 2012. Proceedings
What happens if Eve has a set of records R? There is no simple answer in this case, but we take a “conservative” approach and deﬁne leakage as the worst leakage that may occur when Eve looks at any one of her R records. That is, L0 (R, e) = maxr∈R L(r, e). Note that we are overloading the symbol L: if the ﬁrst parameter is a set, it refers to set leakage; if the ﬁrst parameter is a single record, then it is record leakage. We use the “0” superscript to distinguish this basic set leakage from leakage after the adversary analyzes and possibly combines records (next subsection).
6]. The F measure was introduced by van Rijsbergen . Information leakage adopts these measures in a privacy setting. In addition, our measure reﬂects the adversary conﬁdence and data analysis. Compared to probabilistic information retrieval  where documents are probabilistically ranked, our work probabilistically computes the information leakage itself using possible worlds semantics. 8 Conclusion We have proposed a framework using information leakage as a measure for data privacy. , buying a product from a vendor online).
Adversary Conﬁdence As mentioned earlier, the conﬁdence that adversary Eve has on her data plays a role in computing leakage. For example, Eve may have gotten some information of r from an unreliable website. Or Eve may have heard rumors of the subject indirectly from someone else. If Eve is not so conﬁdent about r, then even if r has a high accuracy against e, the information leakage should be less than when Eve is more conﬁdent. E. Whang and H. Garcia-Molina not accurate, then the information leakage should be considered less than when Eve is not so conﬁdent about the inaccurate information.
Secure Data Management: 9th VLDB Workshop, SDM 2012, Istanbul, Turkey, August 27, 2012. Proceedings by Md. Sadim Mahmud, Sylvia L. Osborn (auth.), Willem Jonker, Milan Petković (eds.)