Blockchain is essentially a decentralized database, right
this is a passage in Alibaba's documentary dreamer. When ps: is repeated many times, it can explain the term "third parties" very well. This is also the beginning of Taobao and Alipay's birth. In other words, at that time, Ali was forced to act as a "third party" because no company could play such a role, so Ali became a center of trust. Businesses and users chose to give money to Ali because of "trust". But what if Ali absconds with money (though impossible...) or if the financial operator has problems (after all, it's human...)? If only there was a machine or a "super system" to do these things! Today, more than ten years after the replacement of Internet technology, blockchain appears in front of us, right! It's the super system;! A machine of trust
with blockchain, things start to change
traditional centralized mode:
decentralized mode under blockchain network:
in decentralized network, each user can be directly contacted without any third party's participation, and the transfer between users is like hand-in-hand cash, which is why bitcoin is called "e-cash"
well, now that a has transferred the money to B, who will charge the account? Alipay has helped me keep account of accounts, which will be unified in Alipay backstage system. In order to make all the transactions of the users recorded and the accounts are correct, Alipay will make great efforts to this end. Look at Alipay's initial
1000 bills per day. Artificial reconciliation is already very painful. With the volume of Alipay now, there are less than hundreds of thousands of bills per day, even if the system reconciliation is unavoidable, and it is necessary to pay the corresponding manpower and material resources to maintain this very complex revenue and expenditure clearing system. Having said so much, how does the blockchain reconcile? The answer is: no! There is no need for reconciliation and zero clearing in the blockchain network, because every node in the blockchain (a computer or a user) has its own account book, which is updated in real time. Any transaction in the blockchain network will be recorded in your own account book. Yes, you also have other people's accounts, But you don't know who this person is, because they all look like this:
The decentralization of blockchain refers to the form of social relations and content generation formed in the process of blockchain development. It is a new network content proction process relative to "centralization"
blockchain is an important concept of bitcoin, which is essentially a decentralized database. At the same time, as the underlying technology of bitcoin, it is a series of data blocks generated by using cryptographic methods. Each data block contains the information of a batch of bitcoin network transactions, which is used to verify the effectiveness of its information (anti-counterfeiting) and generate the next block
blockchain is unified in the whole network, so it is logically centralized. From the perspective of architecture, blockchain is based on peer-to-peer network, so it is decentralized. From the perspective of governance, blockchain makes it difficult for a few people to control the whole system through consensus algorithm, so it is decentralized
extended data:
characteristics of blockchain Decentralization:
decentralization, not without the center, but by the node to freely choose the center, freely determine the center. In short, centralization means that the center determines the node. The node must depend on the center, and the node cannot survive without the center
in a decentralized system, anyone is a node, and anyone can be a center. Any center is not permanent, but phased, and no center is mandatory for nodes
with the diversification of network service forms, the decentralized network model becomes more and more clear and possible. After the rise of Web2.0, the services provided by Wikipedia, Flickr, blogger and other network service providers are decentralized. Any participant can submit content, and Internet users can create or contribute content together
reference source: network blockchain
reference source: Network decentralization
for example, if you are a woman, every time your boyfriend says something 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 deny it. 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, low 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.
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.
blockchain technology is a technology solution that does not rely on a third party and stores, verifies, transmits and communicates network data through its own distributed nodes. Therefore, from the perspective of financial accounting, some people regard the blockchain technology as a distributed, open and decentralized large-scale network bookkeeping book. Anyone can use the same technical standards to add their own information at any time, extend the blockchain, and continuously meet the data entry needs brought by various needs
generally speaking, blockchain technology refers to a way for the whole people to participate in bookkeeping. There is a database behind all the systems. You can think of the database as a big ledger. So it's very important who keeps this account book. At present, whose system will keep accounts, wechat's account book is Tencent's account book, and Taobao's account book is Ali's account book. But now in the blockchain system, everyone in the system can have the opportunity to participate in bookkeeping. If there is any data change in a certain period of time, everyone in the system can conct bookkeeping. The system will judge the person who has the fastest and best bookkeeping in this period, write the content of his records into the account book, and send the content of the account book to all other people in the system for backup. In this way, everyone in the system has a complete account book. This way, we call it blockchain technology
blockchain technology is considered to be the most disruptive technological innovation since the invention of the Internet. Relying on the ingenious distributed algorithm of cryptography and mathematics, it can make the participants reach a consensus without the intervention of any third party center on the Internet where the trust relationship cannot be established, and solve the problem of reliable transmission of trust and value at a very low cost
bitcoin peer-to-peer network stores all transaction history in "blockchain". The blockchain continues to extend, and once new blocks are added to the blockchain, they will not be removed. Blockchain is actually a distributed database composed of a group of scattered client nodes and all participants, which is a record of all bitcoin transaction history. After bitcoin transaction data is packaged into a "data block" or "block", the transaction is initially confirmed. When a block is linked to a previous block, the transaction is further confirmed. After six block confirmations in a row, the transaction was irreversibly confirmed
blockchain is public on the network and can be queried in every offline bitcoin wallet data. The lightweight bitcoin wallet uses online confirmation, that is, it will not download the blockchain data to the device storage
digital currency is easy to be regarded as a new currency by traditional financial institutions, but in fact, the significance and value of its underlying technology is far greater than its monetary attribute. Taking bitcoin as an example, it is generally regarded as a kind of point-to-point digital currency, but from the technical level, it is actually a point-to-point decentralized network platform, which relies on the blockchain technology. Digital currency is a global peer-to-peer network platform based on blockchain technology. Represented by bitcoin, the application of blockchain in the field of digital currency is also known as blockchain 1.0 [1].
When it comes to blockchain, we often encounter the concept of "decentralization". So what is decentralization? Nakamoto has solved the difficult problem of "point-to-point e-cash" defined by himself. In this process, he "invented" the blockchain technology. Bitcoin system integrates technology and theory of cryptography, game theory and software engineering. Blockchain technology is an innovation formed by ingenious combination of existing technologies. Nakamoto didn't solve the problem of "peer-to-peer e-cash" out of thin air. He followed the footsteps of his predecessors, but he completed the last leap
"decentralization" is the competitive advantage of removing the centralized central node. It does not mean that there is no center, but the center node is a relatively neutral existence. These central nodes will not be mandatory. For a fully decentralized system, the connection between nodes is not completed by specific nodes, and all nodes can store and update data on the system, so as to achieve openness
decentralized blockchain is essentially a decentralized distributed ledger database. The simple understanding is that the data of blockchain is stored in many nodes of the network. The traditional way of data storage exists in one or several large nodes in the network. From this point of view, the so-called centralization and decentralization is the difference in the number of nodes storing data. Therefore, the decentralization of blockchain is relative. Data only exists on one node, which must be centralized. But if there are 100 nodes, they can be said to be decentralized relative to one node, but the degree of decentralization is not the same. At the same time, centralization and decentralization are not contradictory, and they are not completely opposite, because the word "de" in decentralization means the process of weakening and eliminating the center, rather than the concept that there is absolutely no center, which is completely opposite to non centralization
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