NDLI: Advanced Security for Virtual Organizations: The Pros and Cons of Centralized vs Decentralized Security Models

Content Provider	IEEE Xplore Digital Library
Author	Sinnott, R.O. Chadwick, D.W. Doherty, T. Martin, D. Stell, A. Stewart, G. Su, L. Watt, J.
Copyright Year	2008
Description	Author affiliation: Nat. e-Sci. Centre, Univ. of Glasgow, Glasgow (Sinnott, R.O.)
Abstract	Grids allow for collaborative e-Research to be undertaken, often across institutional and national boundaries. Typically this is through the establishment of virtual organizations (VOs) where policies on access and usage of resources across partner sites are defined and subsequently enforced. For many VOs, these agreements have been lightweight and erred on the side of flexibility with minimal constraints on the kinds of jobs a user is allowed to run or the amount of resources that can be consumed. For many new domains such as e-Health, such flexibility is simply not tenable. Instead, precise definitions of what jobs can be run, and what data can be accessed by who need to be defined and enforced by sites. The role based access control model (KBAC) provides a well researched paradigm for controlling access to large scale dynamic VOs. However, the standard RBAC model assumes a single domain with centralised role management. When RBAC is applied to VOs, it does not specify how or where roles should be defined or made known to the distributed resource sites (who are always deemed to be autonomous to make access control decisions). Two main possibilities exist based on either a centralized or decentralized approach to VO role management. We present the advantages and disadvantages of the centralized and decentralized role models and describe how we have implemented them in a range of security focused e-Research domains at the National e-Science Centre (NeSC) at the University of Glasgow.
Starting Page	106
Ending Page	113
File Size	337058
Page Count	8
File Format	PDF
ISBN	9780769531564
DOI	10.1109/CCGRID.2008.67
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-05-19
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Information security National security Public key Grid computing Collaboration Access control Large-scale systems High performance computing Certification Authorization
Content Type	Text
Resource Type	Article

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