Implementation of a fuzzy-logic-based trust model.

摘要

This thesis is dedicated to develop a fuzzy-logic based trust model. In general, the e-commerce transactions need costly verification and authentication process. In some cases, it is not cost effective to verify and authenticate each transaction, especially for transactions involving only small amount of money and for customers having an excellent transaction history.;In view of this, in this research a model that distinguishes potentially safe transactions from unsafe transactions is developed. Only those potentially unsafe transactions need to be verified and authenticated.;The model takes a number of fuzzy variables as inputs. However, this poses problems in constructing the trust table since the number of fuzzy rules will increase exponentially as the number of fuzzy variables increase. To make the problem more trackable, the variables are divided into several groups, two for each table. Each table will produce a decision on trust. The final decision is made based on the "intersection" of all these outputs.;Simulation studies have been conducted to validate the effectiveness of the proposed trust model. (Abstract shortened by UMI.).