In essence, it is a decentralized database, and as the underlying technology of Bitcoin, it is a series of data blocks generated by cryptographic methods. Each data block contains a batch of information about bitcoin online transactions, which is used to verify the validity of the information (anti-counterfeiting) and generate the next block.
Blockchain is closely related to people's production and life in public management, energy, hotel management, transportation and other fields, but the centralized nature of these fields has also brought some problems, and blockchain can transform it.
Decentralized fully distributed DNS service can query and resolve domain names through peer-to-peer data transmission services in the network. It can be used in some important infrastructure operating systems and unaltered firmware. It can monitor the status and initialization of software, find bad tampering, and ensure that the data transmitted by the system using Internet of Things technology is useless and tampered with.
The above content refers to Baidu Encyclopedia-Blockchain