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dc.contributor.authorKawamoto, Junpeija
dc.contributor.authorYoshikawa, Masatoshija
dc.contributor.alternative川本, 淳平ja
dc.contributor.alternative吉川, 正俊ja
dc.date.accessioned2011-10-26T00:10:40Z-
dc.date.available2011-10-26T00:10:40Z-
dc.date.issued2009ja
dc.identifier.isbn9.78161E+12ja
dc.identifier.urihttp://hdl.handle.net/2433/148038-
dc.descriptionthe 2009 EDBT/ICDT Workshops : Saint-Petersburg, Russia, 2009.03.22-2009.03.22ja
dc.description.abstractDatabases as a Service (DaaS) are recently in the spotlight as an essential component of the cloud computing framework. We can more easily develop applications to facilitate users' collaboration than without DaaS. Unfortunately, DaaS brings a new risk of data compromise because most data are currently stored and managed by the service provider. Securing users' information, the data are generally encrypted at a trusted client. Although encryption ensures that no one can sneak a look at the data, malicious users still have opportunities to take users' relational information. The relational information, which we name social information as opposed to personal information, has not been adequately examined, but it is becoming important because of improvement of social analysis. As described herein, we first introduce an attack model of obtaining social information from analyses of query logs in DaaS; then we provide a solution to the problem. Our method converts some different queries in the same query, so that malicious attackers cannnot analyze the query logs. We also define an overhead cost of the translation and propose a method that can optimize the conversion using extensible hashing.ja
dc.format.mimetypeapplication/pdfja
dc.language.isoengja
dc.publisherACM Pressja
dc.rightsCopyright 2009 ACM 978-1-60558-650-2ja
dc.rightsThis is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。ja
dc.subjectPrivacyja
dc.subjectWeb Serviceja
dc.subjectDaaSja
dc.subjectSocial Informationja
dc.titleSecurity of social information from query analysis in DaaSja
dc.identifier.urlhttp://doi.acm.org/10.1145/1698790.1698814ja
dc.type.niitypeJournal Articleja
dc.identifier.jtitleProceedings of the 2009 EDBT/ICDT Workshops on - EDBT/ICDT '09ja
dc.identifier.spage148ja
dc.identifier.epage152ja
dc.relation.doi10.1145/1698790.1698814ja
dc.textversionauthorja
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