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dc.contributor.advisorCoghlan, Brian
dc.contributor.authorO'Callaghan, David
dc.date.accessioned2016-11-07T14:47:09Z
dc.date.available2016-11-07T14:47:09Z
dc.date.issued2007
dc.identifier.citationDavid O'Callaghan, 'Trust evaluation for the grid', [thesis], Trinity College (Dublin, Ireland). School of Computer Science & Statistics, 2007, pp 222
dc.identifier.otherTHESIS 8112
dc.identifier.urihttp://hdl.handle.net/2262/77641
dc.description.abstractThis thesis presents models and techniques for automatic evaluation of trust in certification authorities for grid computing infrastructures. The desire for automatic trust evaluation arose out of the need to assess the growing number of certification authorities as they join the grid infrastructure and periodically thereafter. Public key infrastructure is widely used as the basis for authentication in grid middleware. Grids must decide which certification authorities to trust. The International Grid Trust Federation (IGTF) develops authentication policies and accredits certification authorities that meet their requirements. There has been previous research into trust evaluation but it has not met the needs of the grid community. The thesis introduces a semi-formal model for an evaluation of trust in a certification authority’s policies and practices against a set of rules based on the policies of a relying party. The model includes algebras which specify the meaning of the evaluation results for a set of rules. The model supports chaining of multiple sets of rules that reflect, for example, the chain of organisations from the IGTF to the relying party. This model is a suitable basis for the design of software to provide on-demand trust evaluation. A trust evaluation system was implemented by the author – partially in a functional programming style – as a proof-of-concept of the model. The central component of the design is a trust evaluation engine. Two applications of the engine, graphical trust matrices and online validation services, are considered in some detail. The performance of the implemented components was found to be acceptable for their intended uses. Establishment of trust is the first step towards interoperability between different grid middlewares. A scenario has been explored, involving a Metagrid system that would allow secure interoperability between various grid and workflow middlewares. A number of Metagrid security components have been designed and implemented as prototypes. Suggestions for future research arising from this thesis include formal development of the trust evaluation model and software, the application of the engine to a variety of evaluation domains, and the closer integration of trust evaluation with other services for security interoperability.
dc.format1 volume
dc.language.isoen
dc.publisherTrinity College (Dublin, Ireland). School of Computer Science & Statistics
dc.relation.isversionofhttp://stella.catalogue.tcd.ie/iii/encore/record/C__Rb12784609
dc.subjectComputer Science, Ph.D.
dc.subjectPh.D. Trinity College Dublin
dc.titleTrust evaluation for the grid
dc.typethesis
dc.type.supercollectionrefereed_publications
dc.type.supercollectionthesis_dissertations
dc.type.qualificationlevelDoctoral
dc.type.qualificationnameDoctor of Philosophy (Ph.D.)
dc.rights.ecaccessrightsopenAccess
dc.format.extentpaginationpp 222
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