Why is it called three o'clock sleepless blockchain

1.

If you want to understand the application of blockchain, you can refer to many books and opinions, such as illustrated blockchain, blockchain: reshaping the economy and the world, blueprint and guide of new economy, and articles of coin'an community, including a detailed understanding of the platform of coin'an community, with great strength

As the name suggests, blockchain is composed of block and chain. It is a new application mode of computer technology such as distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and so on. It is a kind of chain data structure that combines data blocks in order according to the time sequence, and it is a secure and reliable distributed account book that can not be tampered with and forged by means of cryptography

in 2008, in his paper bitcoin: a peer-to-peer e-cash system published by Nakamoto, he first proposed the idea of blockchain and encrypted digital currency. Starting from bitcoin, blockchain has become the underlying technology of various digital currencies

Second, the working principle of blockchain:

1. The basic concepts include: (1) transaction: one operation will change the account status once, such as adding a record 2) Block: records the transaction and status data within a specified time, which is a consensus and preservation of the current account status 3) Chain: it is composed of a series of blocks in chronological order, which is the log record of the whole state change. If you understand the working concept of blockchain, it is not difficult to understand its working principle. Suppose there is a distributed data logbook, which can only be added, not deleted or changed. Its structure is a linear chain formed by a series of "blocks" (which is also the source of the name of "blockchain"), and new data must be put into a new block to be added, The maintenance node can propose a new block, but it must go through a certain consensus mechanism to reach an agreement on the final selected block

2. Take bitcoin as an example to see the working principle of blockchain

the block of bitcoin is divided into block head and block body

Core advantages and characteristics of blockchain

1. The verification, accounting, storage, maintenance and transmission of decentralized blockchain data are all based on distributed system structure. There is no centralized hardware or management organization, and the rights and obligations of any node are equal, The data blocks in the system are jointly maintained by the nodes with maintenance function in the whole system. 2. The open and transparent system is open. In addition to the private information of all parties to the transaction is encrypted, the data of the blockchain is open to all. Anyone can query the blockchain data and develop related applications through the open interface, so the information of the whole system is highly transparent. 3. Security blockchain uses consensus based specifications and Protocols (such as a set of open and transparent algorithms) to enable all nodes in the whole system to exchange data freely and safely in a de trusted environment, so that the trust in "people" is changed into the trust in machines, and any human intervention does not work. 4. Information cannot be tampered with. Once the information is verified and added to the blockchain, it will be stored permanently. Unless more than 51% (almost impossible) nodes in the system can be controlled at the same time, the modification of the database on a single node is invalid. Therefore, the data stability and reliability of the blockchain are extremely high. 5. Anonymity because the exchange between nodes follows a fixed algorithm, and its data interaction does not need trust (the program rules in the blockchain will judge whether the activity is effective or not). Therefore, the counterparties do not need to let the counterparties generate their own trust by disclosing their identities, which is very helpful for credit accumulation

At present, the most popular classification of blockchain is to divide blockchain into public blockchain, private blockchain and consortium blockchain according to different participants

1. Public chain: anyone can participate in the use and maintenance, and can obtain the effective confirmation of the blockchain. Public chain is the earliest blockchain and the most widely used blockchain at present, such as bitcoin blockchain. The information is completely public

if the licensing mechanism is introced, it includes private chain and alliance chain. 2. Private chain: a company or indivial only uses the blockchain technology, enjoys the exclusive write permission of the blockchain, and does not disclose the information. At present, conservative giants (traditional finance) want to experiment with private blockchain, and the application procts of private blockchain are still groping. 3. Alliance chain: it is a blockchain between the public chain and the existing chain, which is jointly controlled by multiple organizations. The use of the chain is managed with authority, which can be controlled by the manager, and also open to others according to the manager's wishes. In addition, according to the different use scenarios and purposes of blockchain, it can be divided into currency chain for the purpose of digital currency, property chain for the purpose of recording property rights, and crowdfunding chain for the purpose of crowdfunding

On May 28, Ma Huateng, CEO of Tencent, proposed the anti-counterfeiting method based on cloud integrated blockchain technology, which is far more efficient than traditional anti-counterfeiting methods. The future anti-counterfeiting verification scenario may only require users to use their mobile phones for simple scanning, and a large number of complete information based on different dimensions can be obtained

take Maotai liquor as an example:

distillery address, proction workshop, operation staff, inspector, delivery time, transportation vehicle information and driver information,

liquor year, raw material source, raw material supplier, storage warehouse number, raw material transportation vehicle and driver information,

all information can be accurately traced, permanently recorded and tampered with

the above information can be easily verified

2. Food safety issues as early as last November, Wal Mart has cooperated with IBM to track the source of food by using blockchain technology, so as to ensure the safety of food and increase the circulation of food to rece costs. For Wal Mart and other large supermarkets, it took a few days to investigate the source of problem food, After using this technology, only one item of proct information is needed to achieve accurate traceability, and important information such as food origin, inspector, supplier, logistics and transportation can quickly find problems in a few minutes. Currently, procts tracked by blockchain include packaging procts from the United States and pork from China

3. Information security

blockchain technology is promoting an information security technology revolution. (1) identity protection PKI is a common public key encryption technology in e-mail, message application, website and other communication applications. However, since the implementation of most PKI, the centralized trusted third party certification authority (CA) is used to issue, activate and store user certificates. Hackers can attack PKI to fake user identity or crack encrypted information

certcoin is the first PKI implementation of blockchain, which comes from MIT, removes the centralized authentication center, and uses blockchain as a distributed ledger for domain name and public key

pomcor company: blockchain PKI implementation path: keep the authentication center, and use blockchain to store the hash value of issued and activated certificates. Users can verify the authenticity of certificates through decentralized and transparent sources, and can also improve the network access performance through local authentication of secret key and signature based on blockchain

(2) data integrity protection

guardtime developed a secret key free signature architecture (Ksi) based on blockchain technology to replace the secret key based data authentication technology. Ksi stores the hash table of the original data and files on the blockchain, runs the hash algorithm to verify other copies, and compares the results with the data stored in the blockchain. Any data tampering will be found quickly because the original hash table is stored in millions of nodes

(3) key infrastructure protection

the "Achilles heel" of the Internet, DDoS has entered the TB era, DDoS is still the simplest weapon for hackers to bring down the big target with low cost, DNS service is the primary target for hackers to carry out large-scale destruction, but blockchain technology is expected to fundamentally solve the problem

The distributed storage of

blockchain makes hacker attacks lose focus. Nebulis is developing a distributed DNS system, which uses Ethereum blockchain and interstellar Internet file system (IPFs, the distributed substitute of HTTP) to register and resolve domain names. The biggest weakness of DNS is caching, which makes DDoS attacks possible. It is also the bane of the centralized government's censorship of social networks and manipulation of DNS registration. A highly transparent and distributed DNS system can effectively prevent any entity, including the government, from arbitrarily manipulating records

(1) digital currency: improve the convenience of currency issuance and use, such as bitcoin and Ethernet in foreign countries, and guorenbao in China

from the use of physical transactions, to physical currency and credit currency, and then to the rise of bitcoin network, more and more people are aware of the distributed ledger blockchain technology behind it, and graally apply it in many scenarios other than digital currency

(2) cross border payment and settlement: realize point-to-point transaction, rece intermediate fees

transfer and payment. At present, the most mature application of blockchain technology is payment and transfer. Blockchain technology can avoid complicated systems, save the process of inter-bank reconciliation and review, and accelerate the settlement speed; Virtual currency can rece transaction costs without the intervention of clearing house. Different countries have different clearing proceres. It takes two or three days for a single remittance to arrive, which is inefficient and accounts for a large proportion of funds in transit. No longer through the third party, through the blockchain technology to form point-to-point payment. By eliminating the link of the third-party institutions, we can make full day payment, real-time payment, withdraw cash quickly and rece the hidden cost, which helps to avoid the capital risk. It is timely and convenient

(3) bills and supply chain financial business: rece human intervention, rece costs and operational risks

value transfer between point-to-point, control and verify physical bills or central system; Intermediaries will be eliminated and human intervention reced. With the improvement of efficiency, financing channels are more unblocked, risks are lower, and multiple parties benefit

(4) securities issuance and Trading: realize quasi real-time asset transfer, accelerate the speed of transaction clearing

the application of blockchain technology can make the process of securities trading more concise, transparent and fast, rece the plication of IT system, and improve the efficiency of market operation. For stocks, blockchain can eliminate paper and pen or electronic form records, rece human errors in trading, and improve the transparency and traceability of trading platform. Citigroup and Nasdaq cooperate to promote blockchain applications

(5) customer credit investigation and anti fraud: rece the cost of legal compliance, prevent financial crimes

the customer information and transaction records recorded in the blockchain help banks identify abnormal transactions and effectively prevent fraud. The technical characteristics of blockchain can change the existing credit reference system, and store the data of customers with bad records in the blockchain when the bank concts "know your customer" (KYC)

equity crowdfunding:

2. Is this the college entrance examination?

3.

The blockchain escorted by history and philosophy has not subverted other instries, but its habitat has been subverted first

the standard bearers in the coin circle have already "transferred" to foreign countries, such as Zhao CHANGPENG, the founder of coin an, He Yi, Xue Manzi and Bao Erye

The best destination is Japan. At the same time, a news that dozens of people in the coin circle have been controlled by the frontier began to spread among people in the circle

The next resident in Japan is Zhao CHANGPENG, founder of coin an, Xue Manzi, who also visited his office

4. Blockchain and artificial intelligence will become the future of the peerless double pride
we need to change and innovate in the present era, and blockchain, artificial intelligence and new retail are the procts of the era innovation which has been popular in recent years, which makes us proud and proud. Blockchain and artificial intelligence have become the two most discussed concepts in 2018. Blockchain and artificial intelligence have loyal followers in various instries. Which technology can better represent the future development direction of science and technology
in the past year, blockchain, an epoch-making technology, has come into the public eye. It is considered to be the most likely technology to bring about disruptive changes, and is warmly sought after by venture capital and capital with keen sense of smell

whether Alfa dog wins the world champion of weiqi, the opening of private supermarket or the driving of automatic driving cars, artificial intelligence has become the main character of daily news. With Google announcing the establishment of AI China Center in China, the development of artificial intelligence has been written into the government work report. Today, China has become the main role of the world's artificial intelligence instry. 2017 is a wonderful year, known as the "first year of application" of blockchain and artificial intelligence. It can be predicted that in 2018, blockchain and artificial intelligence will still stand in the air and receive high attention from all parties
What are blockchain and artificial intelligence? Blockchain is a kind of decentralized media, which brings an innovative mode of value storage and circulation. Artificial intelligence makes machines create value like human beings. It is a new system of value creation. Therefore, blockchain represents the future proction relationship, while AI represents the future proctivity. From the hot circle of friends of "three o'clock sleepless blockchain" in the early morning to the extensive elaboration of artificial intelligence and blockchain in the government work report in 2018, these two kinds of cutting-edge technologies that firmly catch people's attention are so different that any attempt to combine them will inevitably arouse the curiosity and doubt of the world
blockchain and blockchain technology are two different circles. We often say that currency circle and chain circle are a common division. Currency circle discusses the growth value of currency, while chain circle discusses pure technology. Therefore, sometimes we say that the concept of blockchain is greater than blockchain technology. In fact, the technology of blockchain is not very difficult. Its technology can be used in many places, but it is its technology that sometimes limits its development. On the contrary, the problem of AI is how to survive with human beings. Artificial intelligence is promoting the progress and development of the times in many aspects, but human society is not really ready to meet the arrival of the era of artificial intelligence, whether in human consciousness, ethics, laws and regulations or social management, there is still a long way to go
with the rapid development of artificial intelligence technology, human beings are forced to develop further and constantly innovate rather than stop.

5. I think it should be coin an, because it is a top blockchain company in the world. In only five months since 2017, the 24-hour turnover of coin an has exceeded US $10 billion, and the users of optical services have covered more than 180 countries and regions in the world.

6. It doesn't matter. Three o'clock college

7.

Before and after the Spring Festival, the price of bitcoin changed the declining trend since the beginning of 2018, with an overall increase of 90%. On February 21, it once rose to $11720. At present, it maintains a consolidation position of about US $10000 and chooses a new direction

in the short term, the current situation is much more optimistic than the previous range of 6000-8000 US dollars. But investors still need to be cautious until the direction is set

However, it can be seen that the regulatory policies of cryptocurrency in various countries are becoming more cautious. Therefore, in the short term, the price of bitcoin should not have a very sharp drop

Note: This paper is not an investment proposal

8.

In the Spring Festival of 2018, "3 o'clock sleepless blockchain" has become a hot circle of friends. It is the "world's first blockchain community" that integrates all kinds of VC, blockchain entrepreneurs, Gao Xiaosong, Han Geng, Tong Liya and other artists. On February 26, people's Daily published articles related to blockchain in full page, with three articles in full page: three questions about blockchain, being a leader in digital economy and seizing the opportunity of blockchain. People's daily openly called for seizing the opportunity of blockchain. What is opportunity? This is the best opportunity! If this is a chance in my life, I will not hesitate to seize it

coin elite business school is a very loving and "clean" team. They are positive and looking forward to growing up with you