The pervasiveness of computers in our current IT driven society (transportation, e-commerce, e-transactions, communication, process control), also implies our growing dependency on their "correct" functionality. In many a case, the real value of the systems and also our usage of these systems comes, in part, based on the dependency (real or perceived) we are consequently willing to put into the provisioning of the services i.e., the implicit or explicit assurance of trust we put for sustained delivery of desired services.