Qingshan chain in blockchain
block head: record the characteristic value of the current block
block body: actual data
Public chain, also known as "public chain", refers to the blockchain that anyone in the world can enter the system at any time to read data, send confirmatory transactions and compete for bookkeeping. The public chain is generally considered to be "completely decentralized", because no indivial or institution can control or tamper with the reading and writing of data in it. In terms of application, blockchain public chain mainly includes bitcoin, Ethereum, super ledger, most counterfeit currencies and smart contracts. The ancestor of blockchain public chain is bitcoin blockchain, which has the following characteristics:
1, open source code
upload the code to GitHub, and everyone can get complete blockchain data by downloading, Accept the test of the public
2, complete decentralization
anyone can become a node, each node is open, everyone can participate in the calculation of the blockchain, any node is not permanent, but phased, and any center is not mandatory for nodes. Anyone can read and send transactions, and transactions can be effectively confirmed on the blockchain. Anyone can participate in the consensus process. The consensus process determines whether a block can be added to the blockchain and the exact current state. Everyone can get financial reward from it, which is proportional to their contribution to the consensus process. These public chains are generally considered to be "completely decentralized"
3. Developing decentralized applications
through this public chain, developers can easily develop centralized applications. Public chain can protect the rights and interests of users from the influence of program developers
in addition, there is another kind of asset with the characteristics of anonymity. Its main functions include protecting the privacy of both sides of payment while realizing payment. The more famous ones are dash, monero and zcash
currency is mainly used as the "exchange medium" in the field of blockchain assets. The exchange medium is the general equivalent you use to exchange goods. For example, gold, silver and silver bills can be used as the exchange medium in the past
at present, there are more than 1000 types of digital assets in the world, and the number of currency blockchain projects is not growing fast. As of January 2018, bitcoin is still the largest market value. We are already familiar with bitcoin. In the next few episodes, we will give a detailed introction to Leyte coin, Xinjing coin, Dasch coin, Monroe coin and zcash.
It can be understood as the LAN of Internet bar
a few people use it by themselves, more people use it, and more open people still need license, that is, the alliance chain
there is no need for license at all. Anyone can use the public chain
A: the public chain is open to the public. Users can participate anonymously without registration, and can access the network and blockchain without authorization. Nodes can choose to freely access the network. The blocks on the public chain can be viewed by anyone, and anyone can also be on the public chain