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

Table 4

Access control phase’s time cost for each smart contract.

Access control phase
Smart contract (implement function)	Time cost (AHLaccessDecision)	Time cost (accessDecision)
getURole (get user’s role)	0	0.087
mapRole (map user’s role)	0	0.679
getPolicy (get device’s policy)	0	0.023
getAHL (get permitted access request list)	0.0217	0
Access control (make access decision)	0.0132	0.0872
addAHL (add permitted access request)	0.0202	0.0202
recordAudit (store request and access decision)	0.2055	0.2055
Total time	0.2606	1.1019