"Blockchain validation and consensus mechanisms help ensure IoT privacy and security," said Wu Hequan, a member of the Chinese Academy of Engineering, at the 2017 China IT market annual conference.

In the past year, the technology of blockchain has been flourishing, and has been initially applied in fields such as finance and big data. So in the communications industry, what are the areas where the blockchain can first land? At this annual meeting, Understanding and application of block chain gives its own understanding.

He said that a block is a block of data that contains transaction information on digital assets with a timestamp, and a blockchain is a distributed database of blocks of cryptographically related blocks, also known as distributed ledgers. Blockchain validates the block by bundling recent transactions into the block, using encryption and computational capabilities to verify the block, and adding the verified block to the chain for broadcast over the network. Once the information is validated and added to the blockchain, it is permanently stored. All currently participating nodes work together to maintain the transaction and the blockchain, and the modification of the blockchain by a single node is invalid. Therefore, High reliability.

For example, he said, in the traditional currency trading model, the bank to establish a central database to manage customer account information and balances. If A wants to transfer money to D, it needs bank verification and reconciliation, modify A and D accounts, then allocate money to D.

In blockchain mode, A broadcasts to the neighboring nodes: I want to transfer digital assets to D and send the relevant information to the surrounding nodes. The surrounding nodes confirm the legitimacy of address A holding the funds. When a certain number of nodes verified, the transaction will be established, the surrounding node to record the transaction and confirm the new owner of the paragraph is D. Neighboring nodes then broadcast to other nodes in the network until all nodes record the transaction.

The main purpose of Internet technology is to achieve the rapid sending and receiving of information, and the main purpose of the blockchain is to realize the storage and recording of data; the data on the blockchain is highly tamper-proof, and the Internet data is only encrypted Such as protective measures under the premise of tamper-resistant performance. "Wu He Quan said.

With the large-scale application of NB-IoT, the Internet of Things has entered the take-off phase from the initial stage. However, the security of the Internet of Things has not been well resolved. In this regard, Wu He Quan believes that when the IoT operators for data transmission and storage, because they are in different trust domains and can not communicate through the blockchain data encryption technology and P2P Internet network, you can solve the trust problem, to ensure Data and payment security transfer, and can be calculated according to transaction billing.

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