TrustyFeer: A Subjective Logic Trust Model for Smart City Peer-to-Peer Federated Clouds

Table 2

Opinion calculation [28].

Belief	(Positive/(positive + negative + 2.0))
Disbelief	(Negative/(positive + negative + 2.0))
Uncertainty	(2.0/(positive + negative + 2.0))
Base rate	1.0 if the CSP pretrusted, 0.5 otherwise.