Because blockchain data is typically stored on thousands of devices across a distributed network of nodes, the system and data are highly resistant to technical failures and malicious attacks. Each network node is able to replicate and store a copy of the database, so there is no single point of failure: a single node going offline does not affect the operation of the network system. Figure 3-2-2 shows the schematic diagram of the blockchain decentralized network

Anyone can participate in the blockchain anytime and anywhere because it runs in a large peer-to-peer network and is open to the outside world without time and region restrictions. Each transaction is copied to any node in the blockchain network. Every participant can view all transactions, which also means that every operation is displayed to the participants of the blockchain.

Nodes do not need to rely on a trusted third party to establish trust relationships between them in advance. As long as they operate according to the blockchain protocol, trusted collaboration and interaction can be completed between distributed nodes.

Users in the blockchain only correspond to public key addresses. Therefore, users can complete transactions without revealing their true identity.

In the blockchain system, there is a verification relationship between connected blocks. To tamper with the data of a block, the entire blockchain needs to be changed, and it must be changed within a certain period of time. Therefore, the more nodes in the system, the higher the security of the blockchain.

Blockchain uses a block structure to store data and adds a time dimension to it. Each transaction on a block is cryptographically related to two adjacent blocks, so any transaction is traceable.

Every transaction recorded on the blockchain can be verified and approved by any miner; there is no transaction on the chain that is not recognized by the vast majority of miners.

The blockchain develops application layer services through on-chain scripts, and users can implement diversified decentralized applications by deploying smart contracts.