Reusability for Trust and Reputation Systems

Abstract

Abstract. Reputation systems have been extensively explored in various disciplines and application areas. A problem in this context is that the computation engines applied by most reputation systems available are designed from scratch and rarely consider well established concepts and achievements made by others. Thus, approved models and promising approaches may get lost in the shuffle. In this work, we aim to foster reuse in respect of trust and reputation systems by providing a hierarchical component taxonomy of computation engines which serves as a natural framework for the design of new reputation systems. In order to assist the design process we, furthermore, provide a component repository that contains design knowledge on both a conceptual and an implementation level.

Personalized Composition of Trustful Reputation Systems

“…In order to foster reusability of the particular components of reputation systems, Sänger and Pernul [3] propose a hierarchical component taxonomy of computation engines. The taxonomy forms the basis for setting up a repository containing design knowledge both on a conceptual and an implementation level 1 .…”

“…Compared to [3], we want to go one step further. The selection and interpretation of adequate components for new reputation systems in a specific application area requires time, effort, and to some extent knowledge of the area.…”

“…One major problem in this context is that most of them are completely designed from scratch and that established ideas are rarely considered [2]. To address this, Sänger and Pernul [3] decompose common reputation systems into single functional building blocks and describe and implement them in a publicly available repository.…”

“…We take existing concepts and let the user make up his "new" personalized trust model. Thereto, we develop a software framework that allows to combine the reusable components provided in the aforementioned repository [3]. The benefits of such an approach are manifold.…”

Reusable Defense Components for Online Reputation Systems

“…Then, we identify defense mechanisms for different types of attacks by assigning reusable TRS components that can be employed to extend the functionality of the computation engine. These components are provided in the form of both a conceptual description and fully implemented reusable web-services in the component repository 1 introduced by Sänger and Pernul [10]. The additional attack view on TRS components constitutes an important extension to the yet largely functional view.…”