What is the blockchain: Blockchain technology Bitcoin The basic operation principle has also begun to be well known and valued, and tried to apply it to other industries.As a new currency, Bitcoin, with a stable and secure trading environment, breaks through the original third-party regulatory model, and creates a newer, cheap but secure trading model.
In the high-speed network era, it may even become the majority of mainstream technology based on the Internet field.Why is it so important?
What is a blockchain?
Blockchain English is Blockchain.Blockchain technology had been prototypeed as early as 1991.At that time, a pioneering paper published on Journal of Cryptology- “How to build a time-stamp for digital documents”.
The paper proposes such a concept:
The content of the electronic documentation is transformed into a standard length abstract through the hash algorithm, and then the time stamp is stamped by digital signature technology to the document.The document and the document are connected according to the time order.At the same timeThe accuracy of all the documents in the previous link to each other forms the initial “document chain”.
Because the slight changes of the document will make the digital text formed after the Hash algorithm, which will be large, so if you want to maliciously tampering with any single document in the document chain, you must at the same time tampered with all the documents in the link in the file chain.The huge project means that malicious tampering cannot be performed easily.
With the increase of the volume of documents, only one document is stored in a single node to generate a great verification workload.In 1993, the concept of “hash tree” was introduced.
In the form of “binary branches”, the electronic information that needs to be encrypted is stored in the leaf nodes of the “hash tree”.After the same operation, get the trunk node, and finally merge to the root node.This is the initial “block”.In this “hash tree” or “block”, the information of any leaf changes will directly affect the hash value changes in the root node of the tree, which can reduce the workload of the computer and improve the validity efficiency.A large amount of information is stored in the block.The tree root node information of the former “hash tree” will be recorded in the latter “hash tree” as verification and use.This is the fundamental concept of the blockchain.
In the well-known bitcoin blockchain, the content recorded by each block includes a stamp with a time stamp, which is converted from the user’s transaction data composed of the buyer and seller and the transaction amount.The composition of the paradise will form a “blockchain” according to the sequential order.
Blockchain technology is first applied to encrypted virtual currencies by Bitcoin founder Satoshi Nakamoto.The outside world’s understanding of “Satoshi Nakamoto” is limited to Bitcoin, and the communication with TA is limited to electronic methods.In 2010, “Satoshi Nakamoto” claimed that they had “turned to other things” in an email that “Satoshi Nakamoto” gave another cryptocurrency developer, and then ended the cooperation with Bitcoin.Subsequently, “Satoshi Nakamoto” was only remembered as the founder of Bitza.TA-based blockchain-based point-based point-to -point dots encrypted virtual currencies, leading the beginning of a new global financial environment.
Below is an article published in 2008, which introduces the characteristics of Bitcoin based on blockchain technology in detail.This is also the beginning of Bitcoin:
As the foundation technology of Bitcoin, its essence is to use its own distributed nodes to store, verify and transmit, and communicate through its own distributed nodes to achieve the collective maintenance of all participants to maintain a collective maintenance of one collectively.Technical solution for databases safely.
Among them, the nodes of each branch are blocks.All blocks are transmitted, verified, and communicated after linking in the order of time order to form a connection, that is, the blockchain.
How does the blockchain work?
The purpose of the blockchain was to prevent the transaction from repeating the transaction, that is, to avoid the emergence of fake transactions or counterfeit currency, so Nakamoto decided to attach the time record at the time to achieve the anti-counterfeiting effect.
The person responsible for the record is the user who solves the difficult and difficult hash algorithm calculation questions as soon as possible.This calculation question is generated by automatic programming by the current block, which is highly random.ThereforeCondition.
After obtaining the right to record, attach time information to the current block time and record the time information and record it in the block database.At the same time, users will get a certain amount of Bitcoin and all transaction fees in the current block as a reward forThis inspires the participation of the whole people.
Other users who have not obtained the right to record will check the correctness of the transaction record and time information.After confirming that the block is correct, the block will be added to the main chain of the Bitcoin system.After that, all the transactions will be tested again.After the 6 consecutive blocks have been verified again, the transaction is finalized and cannot be modified and revoked.
so Bitcoin The blockchain workflow is the process of participating in accounting and reconciliation on the entire network:
- Taking time as a separate unit, all information of the unit time is initially uploaded to the entire network.Users on the entire network to add time information to the time information and the correctness of the transaction;
- Users with excellent computing power are responsible for packaging the accounting information into the “block” and added to the main “blockchain”;
- The information in the new “block” was finally determined in the database after being confirmed by other “blocks” again, and then waited for the recording and addition of the next “block”.All “blocks” were connected to the “blockchain”Essence
What are the characteristics of blockchain?
It can be seen from the working principle of the blockchain that the blockchain has its unique advantages:
1.Decentralization
The blockchain technology does not have any central management system.All information is recorded in the block and copied it to all users.Users participate in the records and supervision at the same time to avoid the interests of the user due to the active behavior of managers’ corruption.
2.Trust
In the traditional transaction model, third parties need to be used as witnesses to establish trust communication.Blockchain technology does not require any third party to intervene in the role of the guarantor.Self-monitoring.
3.Do not tamper
All the blocks in the blockchain will add the hash summary of the predetermined block, and the accuracy of the summary of the summary in real time, which makes any data in the blockchain unable to be tampered with.The data of the entire blockchain will change, which effectively prevents the hacker’s attack.
What are the applications of blockchain technology?
Blockchain technology can be applied in a large area that needs credibility with its accurate records of information and unable to tamper and delete.wait.
A.Blockchain digital currency
Blockchain technology is relatively mature in encrypted digital currencies.The rise of many virtual currencies such as Bitcoin and Ethereum and long-term security transactions are enough to prove the strong security maintenance performance of blockchain technology to transaction information and funds.
Related Reading:What is Bitcoin [Update] Bitcoin price+Bitcoin trend in 8 years
B.In the field of multinational finance
The current international exchange, securities transactions, options trading, etc.There are a large number of third-party charging transaction fees and guarantee fees, etc.At the same time, it will be delayed due to the intervention of third parties.After using blockchain technologyThird parties, real-point docking, efficient and low cost.
For example, Visa has launched a Visa B2B Connect based on blockchain technology, which can provide institutions with lower-cost, faster time-effective security cross-border payment methods, and optimize the transaction process between global enterprises.The B2B refers to Business-TO-BUSINESS.
C.In the field of sharing economy
In the field of sharing economy, blockchain technology is also useful.
For example, if a large number of personnel are managed, the hotel service industry is required.If the blockchain technology is applied to a smart contract, the customer can open the room’s smart lock to the smart contract with the smart contract through the blockchain network, which is fast and convenient.
D.Industry that requires credibility
It will greatly simplify the tedious review process in the past while ensuring the accuracy of all information.
For example, the city government of Lugo, Spain, tried to establish a voting system based on blockchain technology.File verification company BitProof used blockchain technology.At present, it has cooperated with Holberton School to pass this technical method.Effectively solve the problem of fraudulent education.
E.Smart contract
Compared with traditional face-to -face signing contracts, the online signing of smart contracts not only play an important role during the epidemic, but also sign a form of signing a major contract for global corporate cooperation in the future Internet era.Intelligent contracts are essentially a digital contract with a programmable architecture.The signing of the contract content will be stored in the blockchain block to ensure its effectiveness and authenticity.Based on blockchain technology, communication has been effectively improved, and long-term asset tracking has also overflowed.
F.Network server data is safe
With the application of various virtual machines, virtual networks and other technologies, data security of network virtual server is the most concerned part of all users.With the help of blockchain technology, hackers cannot attack separately for a certain network or server, maliciously tampering with information, and supervise the normal operation of the entire network.
Will blockchain technology be the future?
With the prevalence of cloud storage, the prevalence of big data, and the beginning of the high-speed 5G era, the Internet will definitely cover human life in the future.The future of the Internet world.
A.low cost
The interaction behavior under the blockchain technology does not require third-party intervention to maintain mutual trust, which is particularly important in the financial industry, because the current third-party charges in the financial sector still occupy a large part of the transaction cost.Or in other areas that need third-party certification, such as notarization of the notary office, blockchain technology will replace the work of notarized persons.
B.Efficiency
In the case that the third party is not required to guarantee trust, users can make a point of transaction, which saves a lot of time costs.It takes a few days to review and complete the transfer.Under the blockchain technology, it may be a few minutes or evenIt can be done in a few seconds.
C.
The original intention of Bitcoin is to hope that everyone can use it.With the support of the blockchain technology, all information is highly transparent, which makes those who cannot open a bank account due to the regional, race or individual experience provides effective assetsProtection does not need to provide a series of proof to the bank to open a bank account that has been regulated by a third party.
Although blockchain technology is becoming more mature and widely used, there are still great challenges.
D.Operating costs
Blockchain technology can indeed save a lot of transaction costs, but it takes a lot of costs to run blockchain technology.At present, high-transport computing computers and huge power consumption are currently the most direct problem to solve the problem.
E.Do not tamper
Yes, this is where we praise it, but for daily transactions, there will be such a situation, “I regret it”, “I want to cancel the transaction”, in the traditional transaction process, this may be achieved, butIn the blockchain environment, I am afraid it is not complete.
FIllegal use
The protection of blockchain technology on its own information is its advantages, but when it is used by illegal people, it has become a criminal umbrella.The most typical case is the “Silk Road”, which is an online “dark network” drug market that was seized and closed by the FBI in 2013.
Is the blockchain technology really safe?Will it be hack?
The security of information data is the most worrying of all netizens, and it is also the most proud of blockchain technology.
Because blockchain technology is different from the application logic of concentrated management in the past, but the database that all members participate in directly shared, the hackers cannot attack the information on a certain node or a particular part to tampering the information.
Compared to the traditional model, hackers need to crack the public blockchain if they want to attack the blockchain, which means that they need to control almost all blocks at the same time.This requires a very large capital and time.impossible.
Since its pioneering in 2009, the integrity of blockchain technology has never been attacked by any hacker.The security level is better than any bank.The famous billionaire Mike Novogratz has hired network security experts to try to crack it.Failure end.
Of course, news that may be heard in the news that “Bitcoin is hacked by hackers”, but the essence of these incidents is to store Bitcoin’s personal digital wallet, or the exchange of Bitcoin transactions has been hacked.These areThe system is still a concentrated management model, and hackers are more likely to find attack points to tampering information.
Therefore, Bitcoin transactions are easily attacked by hackers.
Where can I learn blockchain technology?Blockchain entry
As blockchain technology is becoming more and more widely used, people who want to learn and master this technology have also increased.
Before studying, you can learn about the white paper on Bitcoin about Bitcoin: Bitcoin: a peer-to-pelectronic cash system Essence
This is the origin of the concept of blockchain technology.It is the content that people who want to engage in blockchain technology.
Subsequently, many network resources can be selected and learned.
1.Excellent blockchain books
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2.Udemy blockchain and deep learning
The future of artificial intelligence.The course is divided into paid and free form.It can be learned for free forms, but it cannot obtain services such as relevant certificates and lecturers.The content of the course will explain the concept and deep technical learning of the blockchain.At the same time, it will introduce the fields that can be applied to the blockchain, such as autonomous driving, finance, and so on.
3.Introduction to Udemy cryptocurrency and blockchain
This part of the course is more suitable for entrepreneurs.It will learn the concepts and applications of Bitcoin and blockchain technology from the perspective of technology and economy, as well as how to apply blockchain to its own business activities.
4.Open class of Princeton University
Bitcoin and Cryptocurrency: Bitcoin and Cryptocurrency Technologies Coursera.The system explains the principles of cryptography, the basic concepts of Bitcoin, the application and status quo of the blockchain, etc., and also adds new content related to the blockchain side chain.
5.Course of the State University of New York State University or State University of New York
Blockchain Basics: You can learn blockchain definition, Ethereum blockchain, algorithm and technology, and trust points elements.
6.IBM blockchain course
Provided by IBM, you can learn about the basic knowledge of the blockchain, how to build and maintain related knowledge.
common problem
Question 1: What is the English English?Blockchain English is Blockchain.
See More
Blockchain technology had been prototypeed as early as 1991.At that time, a pioneering paper published on Journal of Cryptology- “How to build a time-stamp for digital documents”.
The paper proposes such a concept: the content of the electronic documentation is transformed into a standard length abstract through the hash algorithm, and then the time stamp is stamped by the digital signature technology to the document.The document can verify the accuracy of all the documents before, and links each other to form the initial “document chain”.
See More
Blockchain technology can be applied in a large area that needs credibility with its accurate records of information and unable to tamper and delete.wait.
See More
The security of information data is the most worrying of all netizens, and it is also the most proud of blockchain technology.
Because blockchain technology is different from the application logic of concentrated management in the past, but the database that all members participate in directly shared, the hackers cannot attack the information on a certain node or a particular part to tampering the information.
Compared to the traditional model, hackers need to crack the public blockchain if they want to attack the blockchain, which means that they need to control almost all blocks at the same time.This requires a very large capital and time.impossible.
See More
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