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

Algorithm 2

Update opinion values for server provider.

(1) procedure Update

(2) if the client provider in a new direct transaction then

(3) Update opinion values of server provider in the client provider’s matrix

(4) believe = ServiceScore ExpectedValueOfClientProvider

(5) disbelieve = (1.0 − ServiceScore) ExpectedValueOfClientProvider

(6) uncertainty = 1.0 − (believe + disbelieve)

(7)end if

(8) end procedure