A Model of Trust for Developing Trustworthy Systems From Untrustworthy Actors

Abstract

Abstract : The objective of this effort is to develop a new model of trust that allowed one to reason about trust relationships in information systems with special emphasis on trust as it related to integrity and availability. The project has produced the following results. 1. It has proposed a formal model to assess multiple levels of trust that is more inclusive than the current binary models. A major strength of the model is that it is more in keeping with the social models of trust used by policy makers. 2. It has defined a notion of degrees of trust and proposed expressions and procedures to evaluate and establish the degree of trust of different systems. 3. It has defined procedures to compare information at different degrees of trust. 4. It has developed procedures to determine the trust level of composed information. 5. It has formulated processes and procedures to manage trust relationships.