Block-chain 3 Blockchain Internet of things 3 blockchain 2 Access control 1 Access policies 1 Access time 1 Antennas 1 Budget control 1 Business resources 1 Buyers and sellers 1 CP-ABE 1 Cloud-based 1 Cloud-based IoD 1 Cloud-based internet of drone 1 Cloud-computing 1 Commerce 1 Consensus algorithms 1 Data privacy 1 Differential privacies 1 Digital devices 1 Digital storage 1 Double auction 1 Edge nodes 1 Electronic document identification systems 1 Fault detection 1 Hidden access policy 1 Incentive mechanism 1 Industrial Internet of Things 1 Information dissemination 1