Blockchain like Tianyi

1.

The strict definition of blockchain refers to the distributed database technology that multiple nodes in peer-to-peer network jointly maintain a continuously growing list ledger constructed by time stamp and orderly record data blocks through consensus mechanism based on cryptography technology. This technical solution allows any number of nodes in the participating system to calculate and record all the information exchange data in the system in a period of time to a data block through cryptography algorithm, and generate the fingerprint of the data block for linking the next data block and checking. All participating nodes in the system jointly determine whether the record is true

blockchain is a technical solution similar to NoSQL (non relational database). It is not a specific technology, and can be implemented through many programming languages and architectures. There are many ways to realize blockchain, including pow (proof of work), POS (proof of stake), dpos (delegate proof of stake), etc

the concept of blockchain was first proposed in the paper "bitcoin: a peer-to-peer electronic cash system" by indivials (or groups) who call themselves Satoshi Nakamoto. Therefore, bitcoin can be regarded as the first application of blockchain in the field of financial payment

< H2 > [popular explanation]

no matter how big the system or how small the website is, there is a database behind it. So who will maintain this database? In general, who is responsible for the operation of the network or system, then who is responsible for the maintenance. If it is wechat database, it must be maintained by Tencent team, and Taobao database is maintained by Alibaba team. We must think that this way is natural, but blockchain technology is not

if we think of the database as a book, for example, Alipay is a typical account book. Any change of data is bookkeeping. We can think of database maintenance as a very simple way of accounting. In the world of blockchain, everyone in the blockchain system has the opportunity to participate in bookkeeping. The system will select the fastest and best bookkeeper in a period of time, maybe within ten seconds or ten minutes. The bookkeeper will record the changes of the database and the account book in a block. We can think of this block as a page. After the system confirms that the records are correct, the system will record the changes of the database and the account book in a block, It will link the fingerprint of the past account book to this paper, and then send this paper to everyone else in the whole system. Then, over and over again, the system will look for the next person with fast and good bookkeeping, and everyone else in the system will get a of the whole ledger. This means that everyone as like as two peas in the system is called Blockchain. It is also called distributed account technology. P>

as like as two peas (computer) have identical accounting books, and everyone has the same rights, they will not collapse e to the loss of contact or downtime of a single person. As like as two peas, the data is transparent and everyone can see what changes are in every account. Its very interesting feature is that the data can't be tampered with. Because the system will automatically compare, it will think that the same number of books with the largest number are real books, and a small number of books with different numbers are false books. In this case, it's meaningless for anyone to tamper with his own account book, because unless you can tamper with most nodes in the whole system. If there are only five or ten nodes in the whole system, it may be easy to do so. However, if there are tens of thousands or even hundreds of thousands of nodes and they are distributed in any corner of the Internet, unless someone can control most computers in the world, it is unlikely to tamper with such a large block chain

< H2 > [elements]

combined with the definition of blockchain, we think that we must have the following four elements to be called public blockchain technology. If we only have the first three elements, we will consider it as private blockchain Technology (private chain)

1, peer-to-peer network (power equivalence, physical point-to-point connection)

2, verifiable data structure (verifiable PKC system, non tampering database)

3, distributed consensus mechanism (Solving Byzantine general problem, solving double payment)

4 Game design of Nash equilibrium (cooperation is the strategy of evolutionary stability)

< H2 > [Characteristics]

combined with the definition of blockchain, blockchain will realize four main characteristics: decentralized, trustless, collective maintenance and reliable database. And the other two will be derived from the four characteristics  Features: open source  Privacy. If a system does not have these characteristics, it can not be regarded as an application based on blockchain technology

Decentralized: there is no centralized hardware or management organization in the whole network. The rights and obligations of any node are equal, and the damage or loss of any node will not affect the operation of the whole system. Therefore, it can also be considered that the blockchain system has excellent robustness

trustworthiness: there is no need to trust each other when participating in the data exchange between each node in the whole system. The operation rules of the whole system are open and transparent, and all data contents are also open. Therefore, within the specified rule range and time range of the system, nodes cannot and cannot cheat other nodes

collective maintenance: the data blocks in the system are maintained by all the nodes with maintenance function in the whole system, and these nodes with maintenance function can be participated by anyone

reliable database: the whole system will enable each participating node to obtain a of the complete database in the form of sub databases. Unless more than 51% of the nodes in the whole system can be controlled at the same time, the modification of the database on a single node is invalid, and the data content on other nodes cannot be affected. Therefore, the more nodes and computing power in the system, the higher the data security in the system

Open Source: since the operation rules of the whole system must be open and transparent, the whole system must be open source for the program

Privacy Protection: since there is no need to trust each other between nodes, there is no need to disclose the identity between nodes, and the privacy of each participating node in the system is protected

2.

Blockchain technology is a new distributed infrastructure and computing paradigm, which uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, uses cryptography to ensure the security of data transmission and access, and uses intelligent contract composed of automated script code to program and operate data. In short, in the blockchain system, the transaction data generated by each participant will be packaged into a data block after a period of time. The data blocks are arranged in chronological order to form a chain of data blocks. Each participant has the same data chain and cannot be tampered unilaterally, Any modification of information can only be carried out with the agreement of the agreed proportion of subjects, and only new information can be added, and the old information cannot be deleted or modified, so as to realize the information sharing and consistent decision-making among multiple subjects, and ensure that the identity of each subject and the transaction information between subjects can not be tampered with, open and transparent

the technical commonness of blockchain projects: block, account, smart contract and consensus, which constitute the general model of the current blockchain system

today, I want to tell you what is a real dragon ball for blockchain application landing and enabling traditional commerce and trade

first of all, dragon ball technology will develop the electronic business platform integration asset plan, and the cable asset payment facility will serve the upcoming block chain business application landing wave. In the future, valuable assets can be applied to all aspects like WeChat payment and Alipay, which will bring convenience to people's payment and life, and at the same time, increase sales to businesses. This is the commercial value brought by Longzhu. Based on Singapore, the Longzhu foundation in Singapore will radiate the world and aspire to become the leader of new asset technology and contribute to the circulation of global commodity trade

3. In short, blockchain is an anti cheating system in digital currency. Just like the anti cheating system in the game, the functions are almost the same
nowadays, many swindlers use the concept of district fast chain to hype, and then pull investment to cheat money. I really don't know what's the use of these people investing in an anti cheating system, which doesn't generate value.

4. Recently, the hottest topic is blockchain. The 24 eldest brothers formed a team to learn blockchain. This event can be regarded as an epic good in the blockchain circle. Starting from the evening of the 25th, bitcoin soared 40% in one day, and then more than n domestic concept coins soared in turn. The whole coin circle was beaten to death. Many aunts in the circle of friends microblog began to study blockchain; On the stock market, the blockchain sector is also very lively, with more than 1000 listed companies claiming to lay out the blockchain field. This shot is really 666. I remember everyone was busy getting rid of blockchain before! It's really forgetful
in a few days, the safe also released the blockchain development plan. It seems that the whole world will be transformed by blockchain. Many people have a kind of blockchain application, which will give the currency transaction and foreign exchange transaction a false identity
blockchain has a natural anti censorship international nature in terms of asset transaction and circulation, and can freely and conveniently circulate without the constraint of traditional concurrent management. On the one hand, there is a great risk, so the safe also said that in China, only RMB can be used for pricing, and anything that may threaten this basis should be prohibited. In a short period of time, it may be difficult for blockchain to achieve anything at the level of foreign exchange transactions. The foreign exchange bureau mentioned the application scenarios of blockchain technology in cross-border trade financing and macro Prudential Management. This direction belongs to the pure technology application direction, which is less related to transactions. At present, it is also the direction that the top priority is to develop, using blockchain technology to optimize the real instry
how to optimize it? Because blockchain has the characteristics of traceability, distributed transparency, tamper proof, etc., for example, in cross-border trade, the data of related parties involved in trade are linked and opened to third parties (such as banks) with permission. In the past, enterprises may need more practical asset mortgage to borrow money from banks, Now, by associating reliable trade data on the blockchain, the bank can know the future cash flow of the enterprise, and can use the operation of the enterprise as asset mortgage to give credit. This will greatly optimize the allocation of assets
another example is the patient information in the hospital. The traditional scenario is that the data of each hospital is independent. Every time you go to a new hospital, you will be asked to do a booklet or a set of examinations. If there is a medical chain open to all hospitals and all information is recorded in this account book, you can avoid a lot of plication and simplify efficiency
it is clear that the priority is to develop blockchain technology to optimize and transform traditional instries, with the focus on the combination with the real economy. I am also very optimistic about this, but in terms of asset trading, the expectation of currency trading and foreign exchange trading should not be too high. After the excitement, it will be calm. FX technology, fxmap in Assa community

5. Digital money is not easy to make. If you buy your own computer "mining", there is no investment of more than hundreds of thousands of yuan, you can't buy advanced mining machine, and the harvest is very small. And if you resell digital currency, it's not easy for you to find your next home e to national restrictions, or you'll end up in your own hands. Let alone bitcoin and other prices, it is difficult to grasp the timing of speculation
for example, there is a Bajiaoxi hydropower station "mine", which is the largest bitcoin "mine" in Leshan City at present. There are more than 5800 bitcoin mining machines in four machine rooms, with more than 40 P (petahashes) computing power, and can "dig" nearly 27 bitcoins every day. According to the current market price of bitcoin, the output value of the "mine" is nearly 200000 yuan a day. However, the overall investment of the mine exceeded 60 million yuan. The daily electricity and other costs are very high. Profits are limited.

6. There's a mining machine in the cave. You can get ore for 10 gold coins, but sometimes you can't