Behavior-centric trust management in distributed systems [electronic resource].

Chang, Jian.
178 p.
Computer science
Local subjects:
Penn dissertations -- Computer and Information Science.
Computer and Information Science -- Penn dissertations.
System Details:
Mode of access: World Wide Web.
Distributed systems have become increasingly prevalent across many application domains that require information processing and computing capabilities. Trust between autonomous entities within such systems is a core factor for such distributed systems to thrive. Without trust, distributed systems will fail their designated objectives due to the lack of sufficient interaction. Trust management systems provide effective mechanisms to encourage trustworthy entity behaviors and reduce trust-violating ones. Traditional trust management systems take an identity-centric approach that focuses on using entity identity information to bridge the gap between entity behavior and trust decisions by asking questions in the form of "Who are you?" The effectiveness of the identity-centric approach assumes known and consistent correlations between entity identity and entity behavior. However, the heterogeneity of modern distributed systems and entity behavior dynamics makes the validity of such assumptions questionable.
Motivated by the potential limitations and drawbacks of the identity-centric approach, this talk presents a novel behavior-centric trust management (BTM) framework that treats behavior as its first-class citizen. That is, the primary question being asked in the BTM framework is "What have you done?" instead of "Who are you?" The proposed BTM framework consists of seven building blocks, namely: trust specification, behavior evaluation, behavior modeling, risk control, behavior enforcement, information exchange, and trust bootstrap. The trust relationships between entities are enhanced with these building blocks for effective trust decision making.
In this dissertation, we first present the architecture of the BTM framework, compare it with the traditional identity-centric approach and other related work in the literature, and have discussions on its potential vulnerabilities and countermeasures. To demonstrate its broad applicability and high effectiveness, we applied the BTM framework into four real-world distributed systems with diverse application contexts and trust semantics, namely: the inter-domain routing system, Web mashups, networked control systems, and crowd-sourced development systems, which extensively cover the problem and design space. Finally, we conclude the dissertation with the lessons we learned from the case studies to evolve the BTM framework into a comprehensive trust management solution for modern distributed systems.
Thesis (Ph.D. in Computer and Information Science) -- University of Pennsylvania, 2013.
Source: Dissertation Abstracts International, Volume: 74-10(E), Section: B.
Advisers: Insup Lee; Sampath Kannan.
Local notes:
School code: 0175.
Lee, Wenke committee member
Sokolsky, Oleg committee member
Smith, Jonathan M. committee member
Loo, Boon Thau committee member
Kannan, Sampath, advisor
Lee, Insup, advisor
University of Pennsylvania. Computer and Information Science.
Contained In:
Dissertation Abstracts International 74-10B(E).
Access Restriction:
Restricted for use by site license.
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