Ppt blockchain

1. From an academic point of view, blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies. Blockchain is essentially a decentralized database
for example, if you are a woman, every time your boyfriend says something disgusting to you or promises to buy something for you, you immediately record it and send it to you and all his friends, classmates, colleagues, as well as various groups and circles of friends, so that he can no longer resist. This is called blockchain
the core advantage of blockchain technology is decentralization, which can realize point-to-point transaction, coordination and cooperation based on decentralized credit in a distributed system without mutual trust by means of data encryption, time stamp, distributed consensus and economic incentive, so as to solve the high cost and low cost of centralized institutions Low efficiency and data storage insecurity provide solutions
the application fields of blockchain include digital currency, token, finance, anti-counterfeiting traceability, privacy protection, supply chain, entertainment, etc. with the popularity of blockchain and bitcoin, many related top domain names have been registered, which has a great impact on the domain name instry.

2. In popular words: if we assume that the database is an account book, reading and writing the database can be regarded as a kind of bookkeeping behavior. The principle of blockchain technology is to find the fastest and best bookkeeper in a period of time, and then send this page of information of the account book to everyone else in the whole system. This is equivalent to changing all records in the database and sending them to every other node in the whole network, so blockchain technology is also known as distributed
ledger
bitcoin, lightcoin, Ethereum, a smart contract platform, and decent, a distributed content publishing platform, all use blockchain technology.

3.

First of all, we need to understand what is public chain: public chain, in fact, is the abbreviation of public chain. It refers to the blockchain that can be read by anyone in the world, that anyone can send transactions and that transactions can be effectively confirmed, and that anyone can participate in the consensus process. In short, a public chain is a blockchain that is open to the whole network and has no user authorization mechanism

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