Trusted and Efficient Cross-Domain Access Control System Based on Blockchain

Algorithm 6

getPolicy.

(1)	Input: devID
(2)	output: string
(3)	% obtain the device’s access policy.
(4)	policy = Stub.GetState (devID);
(5)	if (policy ! = null) then
(6)	return policy;
(7)	else
(8)	return ‘9002’;