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A TRANSPARENT FRAMEWORK FOR
TRUST-BASED COLLABORATIVE DECISION-MAKING
by
Li Zhou
A Dissertation Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(COMPUTER SCIENCE)
December 2006
Copyright 2006 Li Zhou
Object Description
| Title | A transparent framework of trust-based collaborative decision-making |
| Author | Zhou, Li |
| Author email | zhoul@usc.edu |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Computer Science |
| School | Viterbi School of Engineering |
| Date defended/completed | 2006-10-25 |
| Date submitted | 2006 |
| Restricted until | Unrestricted |
| Date published | 2006-11-20 |
| Advisor (committee chair) | Neuman, Clifford |
| Advisor (committee member) |
Hwang, Kai Kuo, C.-C. Jay |
| Abstract | Making of decisions is a common task in software applications. The prevalence of distributed applications requires that decisions should be drawn on the basis of collective wisdoms. However, in many distributed systems, such as grid computing, peer-to-peer systems, and web servers under different domains, entities are administrated independently and do not have common trust among each other, which makes the collaboration insecure under potential attacks and brings many significant challenges to the fulfillment of multilateral decision-making.; In this dissertation, we focus on the problems of how to draw decisions on the basis of collective wisdoms among a group of autonomous collaborators without common trust. We present a new framework that integrates trust, collaboration and decision-making as a whole. It helps distributed applications collaborate with one another while preserving their autonomy in decision-making and mitigating potential attacks on the basis of trust metrics. In particular, we originate a three-layered abstraction model that allows distributed applications to draw trust-based collaborative decisions in a transparent way as if they are only applying stand-alone mechanisms on each local entity. Our framework comprises three principal designs. Trust-based State Variable (TSV) is a pivotal design that integrates local perceptions from each independent collaborator into system-wide perceptions on the basis of the respective interest of each collaborator. Federated Security Context (FSC) explores the solutions to manage the trust relationships and optimize the communication for the trust-based collaboration. Policy Evaluation and Enforcement Agent (PEEA) further provides a design that greatly automates the evaluation of policies and the making of trust-based collaborative decisions.; By implementing our framework as the Trust-based Collaborative Decision-Making (TRUCODEM) toolkit, we greatly secure and simplify the making of multilateral decisions under a distributed system without common trust. We have also applied our trust-based collaborative decision-making framework to several practical applications, such as grid computing, web servers and e-mail servers. This framework greatly enhances their capability and security in collaboration and further supports many advanced features such as trust-based system-wide quota imposition, collaborative intrusion detection and response, and dynamic lockdown. |
| Keyword | trust; collaboration; decision-making |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Type | texts |
| Legacy record ID | usctheses-m176 |
| Rights | Zhou, Li |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | http://www.usc.edu/isd/libraries/services/ask_a_librarian/email/ |
| Filename | etd-Zhou-20061120 |
| Archival file | uscthesesreloadpub_Volume26/etd-Zhou-20061120.pdf |
Description
| Title | Page 1 |
| Full text | A TRANSPARENT FRAMEWORK FOR TRUST-BASED COLLABORATIVE DECISION-MAKING by Li Zhou A Dissertation Presented to the FACULTY OF THE GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (COMPUTER SCIENCE) December 2006 Copyright 2006 Li Zhou |
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