Private Blockchain in Industrial IoT

The three articles in this special section focus are devoted to sharing state-of-the-art research on private blockchain in industrial IoT (Internet of Things). A blockchain is a decentralized and distributed ledger with a chain network of blocks recording historical transactions. A transaction is a record of action. A transaction inside the block will be of: sensing/saving data, assembling parts, depositing money, processing a business deal, ordering/ delivering a product part, notarizing a paperwork, and so on. Blockchains are categorized into two types, public blockchain and private blockchain. Private blockchains have been more in the spotlight in industry recently because they are much faster, cheaper, and privacy-oriented compared to the public blockchain. We expect that private blockchains will be much more widely implemented soon.