Blockchain miracle
blockchain is an important concept of bitcoin. It is essentially a disintermediated 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 bitcoin network transaction, which is used to verify the effectiveness of its information (anti-counterfeiting) and generate the next block
blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies
in a narrow sense, blockchain is a kind of chain data structure that combines data blocks in a sequential way according to the time sequence, and it can not be tampered with and forged by cryptography
broadly speaking, blockchain technology uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, and uses cryptography to ensure the security of data transmission and access It is a new distributed infrastructure and computing method to program and operate data by using intelligent contract composed of automated script code
extended data:
the evolution mode of blockchain is as follows:
& 9642; Blockchain 1.0 - digital currency
▪ Blockchain 2.0 - digital assets and smart contracts
▪ Blockchain 3.0 - Implementation of distributed applications in various instries
blockchain features:
1. Disintermediation. Due to the use of Distributed Accounting and storage, there is no centralized hardware or management organization in the system, the rights and obligations of any node are equal, and the data blocks in the system are jointly maintained by the nodes with maintenance function in the whole system
2. Openness. The 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. Autonomy. Blockchain adopts 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
The information can not be tampered with. Once the information is verified and added to the blockchain, it will be stored permanently. Unless more than 51% of the 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 high5. Anonymity. Because the exchange between nodes follows a fixed algorithm, the data interaction does not need to be trusted (the program rules in the blockchain will judge whether the activity is effective). Therefore, the counterparties do not need to make the other party trust themselves by disclosing their identities, which is very helpful for the accumulation of credit
in the future, blockchain will be applied in any field and bring great impact on human life. Blockchain technology is regarded as one of the main protocols of the next generation of value Internet. Blockchain technology will be useful in any field of proction and life that lacks trust. From digital currency to securities and financial contracts, health care, games, artificial intelligence, intelligent contracts, Internet of things, identity authentication, asset trading, e-commerce, social communication, file storage and other fields can be widely used
in the aspect of medical treatment
when the blockchain technology is used to save the personal medical records, there will be the historical data of personal medical treatment, which can be understood as the electronic medical records on the blockchain. In the future, there will be data for medical treatment or health planning, and the real master of this data is the patient himself, not the hospital or a third-party organization. In addition, these data have strong privacy, and the use of blockchain technology also helps to protect the privacy of patients
payment system
compared with the existing traditional payment system, blockchain technology can avoid the complex system, directly between the two sides of the transaction, does not involve intermediary institutions, even if part of the network is paralyzed, it will not affect the operation of the whole system. This method has the characteristics of low price, fast speed, and no intermediate fees
banking
as a digital, secure and anti-interference account, blockchain realizes the core function of Banking: the safe storage and transfer center of value. Some banks with keen sense of smell in the world have begun to actively plan to join the army of blockchain research and application in order to gain the initiative in the fierce competition in the future
identity authentication of blockchain
blockchain has the feature of being accessible to everyone. Everyone can query the block information in any place with network. The high transparency also makes blockchain full of charm. In the future, ID card and account book are basically not needed, because every identity information can be written into the blockchain. When you need to verify the information, you only need to look it up to find it
election
based on the voting transaction on the blockchain, it can be confirmed that no vote has been modified or deleted, and there will be no improper voting
Real Estate
blockchain technology can change the operation mode of the real estate market. It can combine many complex processes and cases that real estate companies usually deal with, speed up the transaction process, rece fraud, and provide more transparent and secure transactions for each participant. Provides a way to achieve paperless and fast trading needs
the probability of various kinds of errors in securities issuance and trading, such as general stocks, is too high, which requires manual correction, thus prolonging the time required for transaction settlement. Through the transaction of distributed ledger, the automation of the whole process can be realized, and the security and efficiency can be improved. The identity and transaction volume of the trading party are recorded on the blockchain in real time, with an open, transparent and traceable system. It is concive to the market maintenance of securities issuers and regulatory authorities, and can rece the occurrence of black box operation and insider trading
in the scenario of relatively closed, multi-party trust problems and carrying value transmission, blockchain has unique technical advantages and also shows unique charm, which has great application imagination space. At the current stage, blockchain is worth exploring in some scenarios.
these revolutions started and ended with the creation of better and more efficient machines. But the fourth revolution, the instrial Internet of things (iiot) asserts, is coming, and it will not follow in the footsteps of its predecessors
the fourth revolution will not focus on stronger and faster machines: it will focus on machines, processing, sharing and spontaneous information behavior, fundamentally changing our relationship with tools, the world and each other
the data revolution
is not coal, steel, nor silicon. The currency of the fourth revolution will be data
a single gas turbine, coupled to the instrial Internet, generates more than four times as much data in one day as the global Twitter as a whole, but the data we analyze is less than 1%. Bill RUH, chief executive of Ge digital, predicts that digital information will overflow, and today's analysis tools are hopeless
"ten years ago, we might have introced 1TB of data every day." "Today, it's up to about 10000 TB of data," RUH told the Boston Globe. By 2020, we expect to introce about 1 million terabytes of data a day. "
the data generated by future machines is about the same as that of the library of Congress. Imagine reading every book in the library of Congress and then having to summarize what you've learned on 10 pages. The task is not only huge, but also ridiculous
the real miracle of the fourth instrial revolution will not be to proce data, but intelligent machines that can analyze these data and communicate with their peers in the network. Each networked machine will then take action to change its processes to improve efficiency and feed back its changes to the network
I hope these smart machines will bring our world economy to a climax: RUH and Ge believe that in the next 20 years, the smart machines and Internet of things instry will add 10 to 15 trillion US dollars to the global economy. Given that global gross domestic proct (GDP) was about $74 trillion in 2015, this is a huge growth
the foundation of the revolution
for the coming revolution, there are two components that are important and necessary: a centralized, instry-specific Internet communication network, such as predix of General Electric; And systematic, decentralized way, and hinder dishonest communication to promote business development
the specific iiot network must act as a hub for intelligent machines to interact with each other and with human creators. Sensors on the computer collect a large amount of data, and then filter the data in real time. In other words, it can be imagined that it happened on the basis of a machine. However, the investigation results of relay equipment and the decision made without human intervention, in order to truly build an intelligent network, the machine needs a single communication network
imagine that when the aircraft is still in the air, the sensors of the aircraft engine recognize the part that is about to fail, and then communicate with the destination airport. The engine will need maintenance and order replacement parts before landing
this intuitive machine is not a science fiction dream: it's our future
in my opinion, iiot information network is only half the success, and ultimately it is about e-commerce. Seeing it as a public road, millions of autopilot cars will run on top one day.
now, these autopilot cars run on a single system. But how do we ensure that every autopilot will obey the traffic rules? For example, how can we ensure that the vehicle does not send fraud information about its whereabouts at the time of the accident? If there are only two parties involved in the accident, then each passenger will confirm the story of his own car, and there is no way to verify the position claimed by each party
considering that decentralized, satellite based GPS will affect the situation. The system is just and connected to every car. Of course, every car can continue to lie, but it's much easier to verify which side is telling the truth
e to the nature of the GPS system and the nature of its cancellation, the autopilot car has no reason or is tampered with by its owner. This strong incentive for integrity is to promote the trade between autopilot cars, and it is necessary for owners to feel that their investment in these vehicles is safe. Br />GPS technology is for auto driving vehicle, just like network block chain technology for instrial Internet. Of course, self driving cars can run on roads without GPS, but their owners probably will not allow them to do so. Similarly, on a larger scale, machines can communicate on a single, centralized network of the instrial Internet, but only when there is no risk Blockchain is the core part of bitcoin technology. Its function is simple and similar to an account book, recording all transaction data. This account book: 1. It is stored on each bitcoin node of the Internet, and each node has a complete backup; 2. It records all bitcoin transfer transactions since the birth of bitcoin; 3. The ledger is stored in blocks, and each block contains some transaction records. Each block will record the ID of the previous block, forming a chain structure, which is called blockchain; 4. When you want to initiate a bitcoin transaction, just broadcast the transaction information to the P2P network, record your transaction information as a new block and connect it to the blockchain, and the transaction is completed
blockchain has stimulated the revolution in other places
of course, blockchain has promoted the development of e-commerce in the financial instry. But digital information packets are discrete assets like money, and blockchain can create digital records of their existence and transmission. The technology is essentially a unified ledger of records or digital events. The ledger is distributed in the network and shared by different parties, and can only be updated by the majority of these parties. Once a ledger item is created, it can never be erased
blockchain is the missing link in the revolution, because the e-commerce it inspires will define the trust between machines and stakeholders. For example, Volkswagen's recent emissions scandal. VW's tests show that its vehicles emit too much NOx, so it chooses to hide the problem to avoid subsequent inspection
although blockchain will not prevent machines or people from tampering with data, it will create transparent, shared and indelible documents about the original emission data. If this data has been created and shared through the blockchain system, Volkswagen will never embark on the road of fraud, because the difference between the two data sets is obvious
the benefits of iiot are obvious. We have developed machine to machine communication technology; Now, it's the standardization challenge between society and the next revolution. This has driven the development of database technology in the past 30 years, and we have finally seen the momentum of construction
the first mock exam is different from the other enterprises, but if we all want to benefit from the high efficiency brought by the fourth instrial revolution, we must adopt the single mode of machine to machine electronic commerce. And because the communication network has to operate commercially between voluntary participants, we have to integrate the blockchain into this system. In the need to constantly modify the data, and free information trade needs detailed environmental conditions, blockchain is the best path to a new instrial revolution.
With the rapid development of Internet technology, it has brought us infinite wonderful and convenient life. At the same time, with the continuous improvement of 5g network, container cloud and high-performance storage hardware, data growth has entered an unprecedented stage of development
AR, VR, Internet of things, edge computers and other devices available everywhere generate a continuous stream of data, just like an open water pipe, the data source has been flowing out. The data generated will increase geometrically. At this time, the storage technology of blockchain will be demonstrated. A few years ago, there was an excellent IPFs project in the blockchain storage technology
{rrrrrrr}
yottachain takes the blockchain as the underlying technology and develops a powerful incentive scheme for miners. With 1GB
of space invested by miners, yottachain can generate 5-10gb of storage capacity, which proces the miracle effect that the purchasing power of digital currency obtained by resource suppliers exceeds the resources they supply
to put it simply, blockchain is a new application mode integrating various computer technologies. Just treat it as a new technology. The network constructed by blockchain technology has the characteristics of "decentralization", "information tampering", "openness", "anonymity" and "security and reliability". These technologies can be applied in many fields, in short, it is very powerful ~
miner, a simple understanding is a more advanced computer, miner is to contribute to the blockchain network, you can regard miner as the guardian of blockchain
with mining machines, the blockchain network can operate normally. These mining machines are constantly doing calculations to provide computing power for the blockchain network. When the mining machine makes the correct calculation, the whole blockchain network will reward the mining machine with the corresponding digital currency. This process is called mining
if you also want to make a "contribution" to the blockchain, you need to download the mining system to start. Oh, let's have a look.
dream journey to the west, the pets inside are super valuable