What is blockchain? - An explanation from a long-time blockchain practitioner

I. The Blockchain Blockchain is a chain of blocks, and each block is interlocked with the previous block, and the current block has a specific relationship with the previous block, ensuring that each block of the entire chain is mine box connected.

For example, the current block not only stores the current data, but also the information from the previous block, making the data of the entire chain completely connected.

If someone maliciously modifies or deletes information stored in the blockchain, he must pay a fee for the data, which is determined by the size of the bytes uploaded to the blockchain. If we change the information in this block, we must also change the information in the previous block and continue to adjust the information in the previous block, which means that the data in each block must be changed, which costs money. This explains why the blockchain is immutable.

II. Blockchain can be divided into three types basedantminer s19 pro alibaba on the word chain: public chain, alliance chain, and private chain.

A public chain is one that stores all data on the blockchain and is open and transparent. When a message is published on the public chain, it is permanently stored on the blockchain and is visible to anyone. This explains why blockchains are transparent and open.

For example, according to the alliance chain, internal department collaboration can be made public, but external units cannot see the data. The sharing of data between internal departments can help us work faster in government departments, such as blockchain invoices, which significantly reduces the invoicing process.

In fact, the last private chain is not dissimilar to the alliance chain in that some organizations or private enterprises have their own technology to build their own private chain, and then some internal data of the enterprises are on their own chain, and only they or people licensed by them can view the data.

We can see from the preceding two points that gtx 1080 ethereum hashratethe operation of blockchain is completely automatic via the underlying algorithm system, with no need for human intervention. As long as the data is stored in the blockchain, it will be permanently stored in the blockchain's nodes, which explains why the blockchain is decentralized.

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