The blockchain is composed of a shared, fault-tolerant distributed database and a multi-node network. It adopts the characteristics of a distributed database, but in order to achieve strong data consistency and non-tampering, sacrifice It has many advantages and also has other characteristics. What are the characteristics of blockchain? It has the following characteristics.

The characteristics of the blockchain database include: data can only be added in the form of blocks through the identification algorithm and cannot be modified or deleted to prevent tampering; each block will contain at least one block generated Time and block signature; all transaction data will be signed by both parties to prevent denial; in the traditional blockchain, the hash of the previous block is stored in the new block, and this hash is connected to the previous block in the block In the blockchain multi-node network.

All nodes have the permission to browse the block, but they cannot fully control the block; all nodes have the right to verify the block, participate in the authentication, and add data through the authentication. Blockchain can realize; data recording and on-chain data traceability that does not rely on trusted third parties; data communication and trusted value exchange through peer-to-peer networks; very strong against all attacks directed at system center controllers Resistance.

All technologies with centralized ledgers have blockchain application prospects, which is an exchange of efficiency and trust. However, there is no absolute privacy in the blockchain. It will have anonymity characteristics, and overly free smart contracts will bring security issues. Since the blockchain is a very closed ecosystem, its trust can only guarantee the data itself on the chain. , and it is difficult to guarantee that the period from the real world to the blockchain is completely trustworthy.