Titlebook: Secure Data Management; Second VLDB Workshop Willem Jonker,Milan Petkovi? Conference proceedings 2005 Springer-Verlag Berlin Heidelberg 200

Delectable

abstemious

輕浮女

TATE

Melodrama

Specifying an Access Control Model for Ontologies for the Semantic Webes as directed, acyclic graphs, incorporating the basic features of the OWL Lite language. We also show how the privileges are propagated and how we can use constraints to deny access to resources in the Semantic Web, an environment where information can be easily accessed through logic inferences.

BAIL

Detecting Privacy Violations in Sensitive XML Databasesst have ac cess rights that allow them to access the exposed sensitive data. Our solution to the problem is based on an analysis of the users’ XPath queries. Within a two-step approach, we compare submitted queries with the exposed data to iden tify suspicious queries.

Canopy

Protecting Privacy Against Location-Based Personal Identificationed to access sensitive information about specific individuals. The paper formally defines a framework to evaluate the risk in revealing a user identity via location information and presents preliminary ideas about algorithms to prevent this to happen.

幼兒

Experiments with Queries over Encrypted Data Using Secret Sharingbes a working prototype of an encrypted database system that allows remote querying over the encrypted data. Experiments with the system show the practical impact of our encoding scheme on storage space and CPU time. Two algorithms, each with two different matching rules, are compared to each other.

禁止,切斷

連接

A Formal Access Control Model for XML DatabasesWe then extend our theory with predicates allowing us to specify the security policy protecting the database. The security policy includes rules addressing the read and write privileges. We propose axioms to derive the database view each user is permitted to see. We also propose axioms to derive the new database content after an update.