＊Public Blockchain : A public blockchain with read and write permissions open to everyone. Bitcoin, Ethereum. Fully decentralized, public blockchain. Users can participate anonymously without registration and access the network's blockchain without authorization. The stable operation of the public chain depends on the "consensus mechanism". ) can motivate all participating nodes to be "willing to actively cooperate" to jointly maintain the security of data on the chain. Therefore, the operation of the public chain is inseparable from tokens.
Advantages: All transaction data is open and transparent. Cannot be tampered with.
Disadvantages: Low throughput (TPS), the number of transactions that can be processed is low. The transaction speed is slow, and sometimes it takes several days for a transaction to be processed, and a transfer fee of several hundred yuan needs to be paid.
＊Private Blockchain : private blockchain, the read and write permissions are controlled by a certain node. Ant Financial. The read and write permissions of the private chain are in the hands of an organization or institution, and the organization determines the degree of openness of the blockchain according to its own needs.
＊Consortium Blockchain : Consortium blockchain, read and write permissions are open to nodes joining the consortium. The alliance chain is limited to the participation of alliance members. Members participating in the operation of the blockchain need to obtain permission to read and write accounting according to the rules, and are jointly maintained by alliance members. R3 Blockchain Alliance. The specific content is to internally test blockchain technology to see which one can meet the special needs of banks. The distributed ledger technology needed by banks does not necessarily need to be completely open, it only needs to be visible to some groups involved in the transaction.
＊Sidechain : A blockchain that is linked to Bitcoin and can interact with the Bitcoin blockchain. LTC. The side chain is relative to the Bitcoin main chain. It uses Bitcoin as the basis to reconstruct a chain, and then creates new rules to issue tokens on it. All blockchains that follow the sidechain protocol are sidechains. The side chain protocol refers to a protocol that allows Bitcoin to be safely transferred from the Bitcoin main chain to other blockchains, and can be safely returned to the Bitcoin main chain from other blockchains.
Pros: faster and safer. It is definitely faster to transfer some transactions to the side chain. Secondly, if there are problems such as code loopholes in the side chain, it will not affect the main chain, and users do not have to worry about transaction loss or tampering.