Anzeige
Erschienen in:
2007 | OriginalPaper | Buchkapitel
Confidentiality Policies for Controlled Query Evaluation
verfasst von : Joachim Biskup, Torben Weibert
Erschienen in: Data and Applications Security XXI
Verlag: Springer Berlin Heidelberg
Aktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
Controlled Query Evaluation (CQE) is an approach to enforcing confidentiality in information systems at runtime. At each query, a censor checks whether the answer to that query would enable the user to infer any information he is not allowed to know according to some specified confidentiality policy. If this is the case, the answer is distorted, either by refusing to answer or by returning a modified answer. In this paper, we consider incomplete logic databases and investigate the semantic ways of protecting a piece of information. We give a formal definition of such confidentiality policies, and show how to enforce them by reusing the existing methods for CQE.