Defining a federated messaging and trust infrastructure for secure and reliable exchange of data
A Trust Model for Services in Federated Platforms
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Transcript of A Trust Model for Services in Federated Platforms
Atos, Atos and fish symbol, Atos Origin and fish symbol, Atos Consulting, and the fish symbol itself are registered trademarks of Atos Origin SA. © 2006 Atos Origin. Private for the client. This report or any part of it, may not be copied, circulated, quoted without prior written approval from Atos Origin or the client.
A Trust Model for Services in Federated Platforms Fco. Javier Nieto
ATOS Research and Innovation
Stockholm, 23rd March 2011
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Contents
» Introduction
» Problems & Solution
» The Proposed Trust Model» Main Details» Trust Model» The Ontology for the Trust Model» Trust Calculation in three rounds
» Trust in the Federated Environment
» Conclusions
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Introduction
» How do enterprises work?» They collaborate with others in their business
processes Some functionalities/activities are externalized through services;
» Sensitive information may be provided and the received results may ruin the business.
» What do enterprises need?» To be sure that the services used will not put the
business in risk They need to know if they can trust the service (and its provider).
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Contents
» Introduction
» Problems & Solution
» The Proposed Trust Model» Main Details» Trust Model» The Ontology for the Trust Model» Trust Calculation in three rounds
» Trust in the Federated Environment
» Conclusions
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Problems and Solution
» Problems & Requirements:» Use more aspects than ratings and QoS;» Avoid attacks to the model;» Enable new FI scenarios Federated platforms;» Provide fair and accurate scores.
» Trust Model:» Wide model which aggregates information from many
sources;» Usage of rules for avoiding attacks to the model,
based on cause-effect analysis;» Share and evaluate information between federated
platforms;» Provide a customizable model.
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Contents
» Introduction
» Problems & Solution
» The Proposed Trust Model» Main Details» Trust Model» The Ontology for the Trust Model» Trust Calculation in three rounds
» Trust in the Federated Environment
» Conclusions
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Main Details
» Trust seen as “firm belief in the reliability, truth, ability, or strength of someone or something”[Compact Oxford
English Dictionary];» Several calculations supported (especial weighted
average, exponential smoothing, fuzzy sets, statistical tests, services comparison and a mix of some of them);
» Mechanism for sharing information with other platforms and evaluating them;
» Trust ontology for trust calculation and information sharing;
» Consistency management by using rules (with fuzzy sets), according to concepts relationships.
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Trust Model
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The Ontology for the Trust Model
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Trust Calculation in 3 Rounds
1st Round - Calculate Individual Aspects
3rd Round - Calculate Aggregation of Aspects
2nd Round – Ammend Calculation with Fuzzy Rules
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Contents
» Introduction
» Problems & Solution
» The Proposed Trust Model» Main Details» Trust Model» The Ontology for the Trust Model» Trust Calculation in three rounds
» Trust in the Federated Environment
» Conclusions
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Trust in the Federated Environment
GSP1
GSP2
GSP3
CP1ACP1B
CP1C
CP3A
CP2A
CP2B
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Contents
» Introduction
» Problems & Solution
» The Proposed Trust Model» Main Details» Trust Model» The Ontology for the Trust Model» Trust Calculation in three rounds
» Trust in the Federated Environment
» Conclusions
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Conclusions
» When calculating trust, reputation is only a part of the model
» Robustness of the model is a key issue Keep information consistency
» In Federations, provide mechanisms for sharing information and evaluating it properly
» Semantics are a good tool for calculating trust and share information in Federations
Atos, Atos and fish symbol, Atos Origin and fish symbol, Atos Consulting, and the fish symbol itself are registered trademarks of Atos Origin SA. © 2006 Atos Origin. Private for the client. This report or any part of it, may not be copied, circulated, quoted without prior written approval from Atos Origin or the client.
For more information please contact:Fco. Javier Nieto ([email protected]) www.atosresearch.eu
» THANKS!