Cover Stories for Key Attributes—Expanded Database Access Control

Cover Stories for Key Attributes—Expanded Database Access Control

Nenad Jukic (Loyola University Chicago, USA), Svetlozar Nestorov (University of Chicago, USA), Susan V. Vrbsky (University of Alabama, USA) and Allen Parrish (University of Alabama, USA)
DOI: 10.4018/978-1-59904-289-3.ch010
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In this chapter, we extend the multi-level secure (MLS) data model to include nonkey related cover stories so that key attributes can have different values at different security levels. MLS data models require the classification of data and users into multiple security levels. In MLS systems, cover stories allow information provided to users at lower security levels to differ from information provided to users at higher security levels. Previous versions of the MLS model did not permit cover stories for key attributes because the key is used to relate the various cover stories for a particular entity. We present the necessary model changes and modifications to the relational algebra, which are required to implement cover stories for keys. We demonstrate the improvements made by these changes, illustrate the increased expressiveness of the model, and determine the soundness of a database, based on the described concepts.

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Table of Contents
Chapter 1
Mauri Leppänen
This chapter presents an ISD ontology, which aims to provide an integrated conceptualization of ISD through anchoring it upon a contextual approach.... Sample PDF
Towards an Ontology for Information Systems Development—A Contextual Approach
Chapter 2
Raimundas Matulevicius, Patrick Heymans, Andreas L. Opdahl
Goal modeling is emerging as a central requirements engineering (RE) technique. Unfortunately, current goal-oriented languages are not interoperable... Sample PDF
Ontological Analysis of KAOS using Separation of References
Chapter 3
Sergio Luján-Mora, Juan Trujillo
In previous work, we have shown how to use unified modeling language (UML) as the primary representation mechanism to model conceptual design... Sample PDF
Applying UML for Modeling the Physical Design of Data Warehouses
Chapter 4
Wil M.P. van der Aalst, Mariska Netjes, Hajo A. Reijers
Business process management (BPM) systems provide a broad range of facilities to enact and manage operational business processes. Ideally, these... Sample PDF
Supporting the Full BPM Life-Cycle Using Process Mining and Intelligent Redesign
Chapter 5
Pedro Nuno San-Bento Furtado
Some businesses generate giga or even terabytes of historical data that can be organized and analyzed for better decision making. This poses issues... Sample PDF
Efficient Placement and Processing in Shared-Nothing Data Warehouses
Chapter 6
Colleen Cunningham, Il-Yeol Song
Customer relationship management (CRM) is a strategy that integrates concepts of knowledge management, data mining, and data warehousing in order to... Sample PDF
Factors Affecting Design Decisions for Customer Relationship Management Data Warehouses
Chapter 7
Xuepeng Yin, Torben Bach Pedersen
In today’s OLAP systems, physically integrating fast-changing data, for example, stock quotes, into a cube is complex and time-consuming. This data... Sample PDF
Effective Processing of XML-Extended OLAP Queries Based on a Physical Algebra
Chapter 8
Keng Siau, John Erickson, Lih Yunn Lee
An on-going and major problem faced by information systems developers and business users alike is reaching a clear and consensual understanding of... Sample PDF
Is There a Difference Between the Theoretical and Practical Complexity of UML?
Chapter 9
Jeretta Horn Nord, G. Daryl Nord, Hongjiang Xu, Elizabeth S. Myrin
This chapter presents results from a large-scale survey of Australian CPA members regarding data quality. The research investigates and reports... Sample PDF
Data Quality: An Assessment
Chapter 10
Nenad Jukic, Svetlozar Nestorov, Susan V. Vrbsky, Allen Parrish
In this chapter, we extend the multi-level secure (MLS) data model to include nonkey related cover stories so that key attributes can have different... Sample PDF
Cover Stories for Key Attributes—Expanded Database Access Control
About the Contributors