2. Decentralization and distrust mechanism. Blockchain is a peer-to-peer network composed of many nodes, and there is no centralized equipment and management organization. The data interaction between nodes is verified by digital signature technology, and there is no trust, just according to the set rules, and there is no problem of deception and distrust between nodes.
3. The transaction is transparent, both parties to the transaction are anonymous, the operation rules of the blockchain are open and transparent, all data information is also public, and every transaction is publicly visible to all nodes. Because nodes are untrustworthy, they don't need to disclose their identities, and each participating node is anonymous.
4. It cannot be tampered with and can be traced back. The modification of the database by a single node or even multiple nodes will not affect the databases of other nodes. Every transaction in the blockchain is connected in series with two adjacent blocks through cryptography, so all records of each transaction can be traced back.