Block-chain Blockchain 2 Block by blocks 1 Blockchain storage 1 Blockchains 1 Business transaction 1 Costs 1 Economics 1 Finance 1 Game 1 Game theory 1 Games 1 IEEE transaction 1 IEEE transactions 1 Incentive mechanism 1 Information leakage 1 International trade 1 Letter of credit 1 Miners 1 Negative externalities 1 Peer to peer 1 Peer-to-peer business transaction 1 Process risks 1 Protocols 1 Robots 1 Storage costs 1 Systems engineering 1 Third parties 1 Trade finance 1 User transaction 1