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Security specification and enforceme...

Yang, Li.

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Security specification and enforcement in mediation system.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Security specification and enforcement in mediation system./
作者:	Yang, Li.
面頁冊數:	120 p.
附註:	Major Professor: Raimund K. Ege.
Contained By:	Dissertation Abstracts International66-09B.
標題:	Computer Science. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3190966
ISBN:	9780542333194

Security specification and enforcement in mediation system.
Yang, Li.

Security specification and enforcement in mediation system. - 120 p.

Major Professor: Raimund K. Ege.

Thesis (Ph.D.)--Florida International University, 2005.

Mediation techniques provide interoperability and support integrated query processing among heterogeneous databases. While such techniques help data sharing among different sources, they increase the risk for data security, such as violating access control rules. Successful protection of information by an effective access control mechanism is a basic requirement for interoperation among heterogeneous data sources.

ISBN: 9780542333194Subjects--Topical Terms:

626642
Computer Science.

Security specification and enforcement in mediation system.
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520 $a This dissertation first identified the challenges in the mediation system in order to achieve both interoperability and security in the interconnected and collaborative computing environment, which includes: (1) context-awareness, (2) semantic heterogeneity, and (3) multiple security policy specification. Currently few existing approaches address all three security challenges in mediation system. This dissertation provides a modeling and architectural solution to the problem of mediation security that addresses the aforementioned security challenges. A context-aware flexible authorization framework was developed in the dissertation to deal with security challenges faced by mediation system. The authorization framework consists of two major tasks, specifying security policies and enforcing security policies. Firstly, the security policy specification provides a generic and extensible method to model the security policies with respect to the challenges posed by the mediation system. The security policies in this study are specified by 5-tuples followed by a series of authorization constraints, which are identified based on the relationship of the different security components in the mediation system. Two essential features of mediation systems, i. e., relationship among authorization components and interoperability among heterogeneous data sources, are the focus of this investigation. Secondly, this dissertation supports effective access control on mediation systems while providing uniform access for heterogeneous data sources. The dynamic security constraints are handled in the authorization phase instead of the authentication phase, thus the maintenance cost of security specification can be reduced compared with related solutions.
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