Trust and Reputation for Information Exchange in Critical Infrastructures

Today’s Critical Infrastructures (CI) are highly interdependent in order to deliver their services with the required level of quality and availability. Information exchange among interdependent CI plays a major role in CI protection and risk prevention for interconnected CI were cascading effects might occur because of their interdependencies. This paper addresses the problem of the quality of information exchanged among interconnected CI and also the quality of the relationship in terms of trust and security. The use of trust and reputation indicators associated with the information exchange is the proposed solution. The proposed solution is being applied to information exchange among interconnected CI in scope of the European FP7 MICIE project, in order to improve information accuracy and to protect each CI from using inconsistent and non trustable information about critical events.