Briefly describe the main content of blockchain technology
block head: record the characteristic value of the current block
block body: actual data
Blockchain is a term in the field of information technology. In essence, it is a shared database. The data or information stored in it is characterized by "unforgeability", "trace in the whole process", "traceability", "openness and transparency" and "collective maintenance". Based on these characteristics, blockchain technology has laid a solid "trust" foundation, created a reliable "cooperation" mechanism, and has broad application prospects
on January 10, 2019, the state Internet Information Office issued the regulations on the management of blockchain information services. In October 24, 2019, ring the eighteenth collective learning of the Central Political Bureau, general secretary Xi Jinping stressed that "block chain as an important breakthrough in core technology and independent innovation", "accelerating the development of block chain technology and instrial innovation". "Blockchain" has entered the public field of vision and become the focus of social attention
on December 2, 2019, the word was selected into the top ten catchwords of "biting words" in 2019
extended data:
Application of blockchain Finance:
since 2016, the major financial giants have also carried out blockchain innovation projects to explore the possibility of applying blockchain Technology in various financial scenarios. In particular, Puyin group took the lead in creating a "blockchain +" standard digital currency
standard digital currency refers to the process of assets identification, evaluation, right confirmation and insurance completed by a third party organization, which is written into the blockchain through careful digital algorithm to form the standard corresponding relationship between assets and digital currency, which is called standard digital currency
in order to realize the great leap forward development of blockchain finance, promote the new development of China's economy, accelerate the circulation of global assets, and realize the dream of rejuvenation that has been struggling for generations, Puyin group will hold the Guiyang strategic development ceremony of Puyin blockchain finance in Guizhou on December 9, 2016
the meeting will discuss the realization of digital circulation of assets by blockchain, the financial transaction mode of blockchain, and the application of blockchain services and social public instry. This conference will mark the beginning of the application of blockchain finance and the change and development of the new financial ecology
the core idea of blockchain is decentralization
in the blockchain system, the rights and obligations of any node are equal, and all nodes have the ability to vote with computing power, Thus, the result recognized by more than half of the nodes is guaranteed. Even under serious hacker attacks, as long as the number of nodes controlled by hackers does not exceed half of the total number of nodes in the world, the system can still operate normally and the data will not be tampered with
block chain's biggest subversive nature is the establishment of credit
theoretically, block chain technology can make WeChat payment and Alipay no longer exist value. The economist makes an image metaphor for blockchain: in short, it is "a machine for creating trust". Blockchain enables people to cooperate with each other in the case of mutual distrust and no neutral central institution. The fight against counterfeit money and financial fraud will not be needed in the future
the collective maintenance of blockchain can rece the cost
under the centralized network system, the maintenance and operation of the system depend on the operation and maintenance of platforms such as data center, and the cost cannot be omitted. Anyone can participate in the nodes of the blockchain. Each node can verify the correctness of the results of other nodes' records while participating in the records, which improves the maintenance efficiency and reces the cost
in a word, blockchain touches money, trust and power, which are the fundamental basis for human survival.
first, the meaning of blockchain technology
blockchain technology is a kind of technology that uses decentralized consensus mechanism to maintain a complete, distributed and tamper proof ledger database. It can enable the participants in the blockchain to realize a unified ledger system without establishing a trust relationship. The block is a public account book, which needs multi-point maintenance; Chain is covered with timestamps, which can not be forged. Blockchain is essentially a technology that focuses on security and credibility rather than efficiency
at present, there is a database behind all systems, that is, a large account book. So it's very important who keeps this account book. Now, whose system is who will keep accounts, and the bank accounts are the records of each bank, and Alipay's account is Ali. But now in the blockchain system, everyone in the system can have the opportunity to participate in bookkeeping. If there are new transaction data changes in a certain period of time, everyone in the system can make bookkeeping. The system will judge the fastest and best bookkeeper in this period, write the recorded content 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
as a result, the data becomes very secure. Tamperers need to modify more than half of the system node data at the same time to truly tamper with the data. The cost of such tampering is so high that it is almost impossible. For example, bitcoin has been running for more than seven years, and countless hackers around the world have tried to attack bitcoin, but so far there have been no trading errors. It can be considered that bitcoin blockchain has been proved to be a safe and reliable system. Therefore, it can be considered that blockchain technology is a way for the whole people to participate in bookkeeping, and what it will bring is the innovation of bookkeeping.
The way in which people keep accounts together is also known as "distributed" or "decentralized", because everyone keeps accounts, and the accuracy of the account book is determined by the program algorithm, not by an authoritative organization
this is the blockchain, the core is finished, blockchain is so simple, a common account book
six core algorithms of blockchain Technology:
blockchain core algorithm 1: Byzantine agreement
the story of Byzantine is like this: the Byzantine Empire has great wealth, and the surrounding 10 neighbors have been around for a long time, but the Byzantine walls stand tall and firm, No single neighbor has been able to successfully invade. Any single neighbor's invasion will fail, and at the same time, it may be invaded by other nine neighbors. Byzantine Empire's defense ability is so strong that at least more than half of its ten neighbors attack at the same time before it can be broken. However, if one or several of the neighbors agree to attack together, but betray in the actual process, then the invaders may be annihilated. So each side was careful and could not easily trust its neighbors. This is the question of Byzantine Generals
blockchain core algorithm 2: asymmetric encryption technology
in the above Byzantine agreement, if several of the 10 generals send messages at the same time, it is bound to cause confusion in the system, resulting in different attack time schemes and inconsistent actions. Anyone can send the message of attack, but who will send it? In fact, it only needs to add a cost, that is, only one node can spread information in a period of time. When a node sends a unified attack message, each node must sign and seal to confirm its identity when receiving the message from the initiator
blockchain core algorithm 3: fault tolerance problem
we assume that in this network, messages may be lost, damaged, delayed and sent repeatedly, and the order of receiving is inconsistent with the order of sending. In addition, the behavior of nodes can be arbitrary: they can join or exit the network at any time, they can discard messages, forge messages, stop working and so on, and they may also have all kinds of human or non-human failures. Our algorithm provides fault tolerance for consensus system composed of consensus nodes, which includes both security and availability, and is suitable for any network environment
blockchain core algorithm 4: Paxos algorithm (consistency algorithm)
the problem solved by Paxos algorithm is how a distributed system can reach an agreement on a certain value (decision). A typical scenario is that in a distributed database system, if the initial state of each node is consistent, and each node performs the same operation sequence, then they can finally get a consistent state. In order to ensure that each node executes the same command sequence, it is necessary to execute a "consistency algorithm" on each instruction to ensure that the instructions seen by each node are consistent. A general consistency algorithm can be applied in many scenarios, which is an important problem in distributed computing. There are two models of node communication: shared memory and message passing. Paxos algorithm is a consistency algorithm based on message passing model
blockchain core algorithm 5: consensus mechanism
blockchain consensus algorithm is mainly workload proof and equity proof. Take bitcoin as an example. In fact, from a technical point of view, POW can be regarded as a reusable hashcash, and the generation workload proves to be a random process in probability. When mining a new secret currency and generating a block, the consent of all participants must be obtained, and the miner must obtain the pow work proof of all data in the block. At the same time, miners have to constantly observe and adjust the difficulty of this work, because the requirement for the network is to generate a block every 10 minutes on average
blockchain core algorithm 6: distributed storage is a kind of data storage technology, which uses the disk space of each machine through the network, and forms a virtual storage device with these scattered storage resources, and the data is stored in every corner of the network. Therefore, distributed storage technology does not store complete data in each computer, but stores the data in different computers after cutting. It's like storing 100 eggs, not in the same basket, but separately in different places. The total number is 100. Want to learn more, you can make more use of network search, network search results - small knowledge
The first episode is a new beginning
the golden light of the eastern Wujin City, the new divine realm of Qin Meng universe, shines and rises slowly. A small golden bead flies out of the city and floats into Xing Yuan's forehead. In an instant, Xing Yuan understands everything about the new universe, and his cultivation rises directly from the lower gods to the realm of the God King. The sky of the new divine realm suddenly twinkles with colorful auspicious clouds, The first king of the new world was born<
Chapter 1 eight holy emperors
Chapter 2 resurrection of Zuo Qiumei
Chapter 3 banquet
Chapter 4 ancient plate of earth people
Chapter 5 shaking of Hongmeng space
Chapter 6 waiting for fees and receiving apprentices
Chapter 7 Hongjun Xingfu
Chapter 8 changes of Fengshen list
Chapter 9 new beginning
Episode 2 my name is Hongjun
Hongjun was Qin Shuang at that time, Qin Shuang doesn't pay attention to her. That's normal. The gap between them at that time was too big, let alone Qi Yun. Even the whole purple Xuan star didn't have Qin Shuang's eyes“ Ten years ago? What happened ten years ago? I can't remember Hongjun looked up at Qi Yun blankly. Ten years ago, Qingyun restaurant was brought into the list of gods with the change of last time. Now he really doesn't know<
Chapter 1 sudden calamity
Chapter 2 April 9th calamity
Chapter 3 character edition
Chapter 4 Xingchen Pavilion
Chapter 5 ziyangmen
Chapter 6 pursuit
Chapter 7 Qin family treasure
Chapter 8 undercurrent surging (Part 1)
Chapter 9 undercurrent surging (Part 2)
Chapter 10 treasure appears
Chapter 11 Qin family blood
Chapter 12 killing begins
Chapter 13 Chapter 14: opening the treasure Chapter 15: Qi Yun again Chapter 16: crossing the robbery together Chapter 17: compass of the ancient compass episode 3: the world of immortals, demons and Demons, Even the lowest person in the dark star world is inferior to him. If his body is not hard, the pressure on the reunion star can crush him
Chapter 10 purple eyed zombies
Chapter 11 middle stage of the first layer of Hongjun road
Chapter 12 Murong Ruoxue
Chapter 13 summon
Chapter 14 identity leakage
Chapter 15 Ouyang fan
Chapter 16 go to the battlefield again
Episode 4 Shura world
our demon clan is aggressive, and the eagle clan is better. On the beautiful planet of sky blue star, every city has a platform than Wu, As long as there are no human beings killed, no one will take care of the monsters on the stage<
Chapter one Wukong set up a challenge
Chapter two sky shaking stick technique
Chapter three ouzi
Chapter four Shura world
Chapter Five zombies
Chapter six green eyed zombies
Chapter Seven five hundred years
Chapter Eight Hongjun first and then heaven
Chapter Nine great war
Chapter Ten purple eyed stiff corpse
Chapter Eleven middle stage of the first layer of Hongjun road
chapter twelve Murong Ruoxue
Chapter five hundred years of Wukong set up a challenge
Chapter two sky shaking stick technique Chapter 13 summons
Chapter 14 identity divulges
Chapter 15 Ouyang fan
Chapter 16 on the battlefield
Episode 5 Luo Bing
in the temporary meeting hall where the Shura emperor is located, the patriarchs of the nine families and four Hongjun are all present. For tens of thousands of years, the nine families have been familiar with the four members of Hongjun. Besides, Gupan is also the son-in-law of Murong family. Although the nine families still don't know the real identities of the four members of Hongjun, it's not surprising that they can attend such a meeting. When Sun Wukong arrived at the eighth level demon emperor, In addition to royal family Luo Jiacheng, the Shura type
first chapter Luo Bing
second chapter Jing Tian San Cuan
third chapter transient calm
fourth chapter shaking the whole field
fifth chapter fighting
sixth chapter Yuanying disappearing
seventh chapter ting
eighth chapter entering Weng
ninth chapter ultimate transformation
tenth chapter qinsi going out of the pass
eleventh chapter fighting again
twelfth chapter conquering Tiantian Star
Chapter 13 the final battle
Chapter 14 The Golden eyed God
Chapter 15 the massacre
Chapter 16 the appearance of Qin Si
Chapter 17 all disappear
Episode 6 the unknown space
a completely unknown space, Hongjun finds that his way of Hongjun has entered the second level, and his cultivation has entered the realm of inferior gods and men again, In such a space that no one knows, the fate of Hongjun, qinsi, Gupan, Monkey King, Fengxi and Luobing, and all the results will be handed down after the stars change<
Chapter One: Dead City
Chapter Two: continuous ascent
Chapter Three: a fight
Chapter Four: rescue
Chapter Five: another left eyebrow
Chapter Six: I'm not dead
Chapter Seven: searching all the way
Chapter Eight: Konglin version
Chapter Nine: news version of Monkey King
Chapter Ten: Monkey King's power
Chapter Eleven: Space Law
chapter twelve: exhibition style < br />Chapter 13 forced solicitation
Chapter 14 surrender
Chapter 15 preliminary plan
Chapter 16 quiet development
Chapter 17 Zhao Yunxing
Chapter 18 cooperation success
Chapter 19 is to find fault
Chapter 20 is to send it to the door
Chapter 21 is to bet and fight
Chapter 22 is unexpected gambling
Chapter 23 is Bai wanjian
Chapter 2 Chapter 14 fierce dark star people
Chapter 25 killing
Chapter 26 soaring
Chapter 7 Lin Lin and Liu Hanshu stop and go in the streets of the village. There is no difference between this village and several villages he once passed by. The gods are constantly working hard, striving to fly to the eighth floor. Obviously, People on the eighth floor are also trying to fly to the ninth floor< In the third episode, I'm against the center
Chapter four refining artifact
Chapter Five breaking the sky sword
Chapter six fighting against the sky
Chapter Seven fighting
chapter eight winning
Chapter Nine gaining power
chapter ten collecting debt
Chapter Eleven heaven and earth net
chapter twelve killing
chapter thirteen killing Chapter 14 Lin Lin, Liu Hanshu
Chapter 15: reminiscence
Chapter 16: finding Luo Bing
Chapter 17: talking out
Chapter 18: xuanjing iron ore
Chapter 19: Acting
Chapter 20: Zhongji
Chapter 21: entering the urn
Chapter 22: annihilation
Chapter 23: nine cities in total
Chapter 24: closing down
Chapter 25: discussion
Chapter 26: chengao Hand
Chapter 27 the counterattack of the first divine world
Chapter 28 breaking the array
Chapter 29 luring the enemy
Chapter 30 three to ten million
Chapter 31 three celestial weapons
Chapter 32 storm and thunder regiment
Chapter 33 retreating
Chapter 34 serial array method
chapter 35 Zhou family comer
Chapter 36 soliciting me? First change your surname
Chapter 37 immortal seal
Chapter 38 lure the enemy
Chapter 39 concerns of modo
Chapter 40 death battle
Chapter 41 sky change
episode 8 new pattern
Chapter 1 four guardian orcs
Chapter 2 martyrdom
Chapter 3 continue to capture the city
Chapter 4 exit
Chapter 5 the arrival of the monkey king
Chapter 6 Small conflicts
Chapter 7 fighting
Chapter 8 investigation of the Zhou family
Chapter 9 Zhou Lan
Chapter 10 interrogation
Chapter 11 jinyanjiangshen
Chapter 12 wanhuoyinjue
Chapter 13 massacre
Chapter 14 development
Chapter 15 secrets of the four orcs
Chapter 16 verification
Chapter 17 Lord recognition
Chapter 18 loose outside and tight inside
Chapter 19 Chapter twenty one eight people
Chapter twenty two scuffle
Chapter twenty three demon king
Chapter twenty four Hongjun died
Chapter twenty five the fourth universe
Chapter twenty six Luo Bing's determination
Chapter twenty seven release seal
Chapter twenty eight defeat
Chapter twenty nine new pattern
episode nine Hongjun Junjie
Qin Yu smiles and nods to Gupan. Lin Meng laughed and said, "Gupan, it's powerful. I didn't expect that you could create the universe so quickly without anyone's help. It's faster than the third brother Qin Yu." Qin Yu's growth is completely in Lin Meng's eyes. From the beginning of creating the universe to the completion of the universe, it took Qin Yu thousands of years to complete, even if the acceleration of time is not considered. The ancient plate, which is only a few hundred years old, is ten times faster<
Chapter one four brothers
Chapter two pursuing and killing
Chapter Three surging in all directions
Chapter four the third king of Jin Xing
Chapter five the mystery of the dark star world
Chapter Six mutual feelings
chapter seven six samsara
Chapter Eight two Zhous
Chapter Ten Liuguang emperor
Chapter Eleven attacking
chapter twelve Zhou Yan's Secret
chapter thirteen brothers meeting
Chapter 14 Qin Yu's heart
Chapter 15 finding fault
Chapter 16 time stillness
Chapter 17 Zhou Yan's plan
Chapter 18 new discovery
Chapter 19 streamer revenge
Chapter 20 scuffle
Chapter 21 Hongjun's weakness
Chapter 22 earth player Lei Wei
Chapter 23 star field
Chapter 24 five transformations
Chapter 24/ >Chapter 25: the valiant zombies of the five transformations Chapter 26: Solving Troubles chapter 27: being strong chapter 28: the strength of the army chapter 29: killing Chapter 30: the king of zombies chapter 31: different souls Chapter 32: incomplete souls chapter 33: cracks chapter 34: the key to refining Chapter five: embryo and soul
Chapter 36: good things
Chapter 37: a shot against the sky
Chapter 38: fusion
Chapter 39: counter center! Yuhuang<
Chapter 40 battle
Chapter 41 Tianzun Lingbao
Episode 10 six samsara
the three realms are heaven, earth and man. There are humanity and animal Tao in human world, which are human and animal respectively. Humanity is the one who cultivates the truth and the devil, and animal Tao cultivates the demon. There are heaven way and Shura way in heaven, hell way and hungry ghost way in earth. The gate of the six paths of reincarnation leads to the three realms, and turns to the six paths<
Chapter One: the controller of the unknown space
Chapter Two: the way of heaven
Chapter Three: the exposure of the trace
Chapter Four: the defense of heaven
Chapter Five: the death of Qin Si
Chapter six: destiny
Chapter Seven: Qin Yu's visit
Chapter Eight: grandfather Lian
Chapter Nine: Beifu
Chapter Ten: return to the lower nine levels
Chapter Eleven: Teacher Zhao Yunxing
chapter twelve: the news of the rebellion
Chapter Four Chapter 13 Zhou Yan's exit Chapter 14 zombie legend Chapter 15 soul completion Chapter 16 tianmeng's son< Can stars change again< Chapter 18 can return to the human world
Chapter 19 Qin Si and Bing Yan
Chapter 20 revenge
Chapter 21 Kuang Tianming
Chapter 22 explodes again
Chapter 23 two tianzuns
Chapter 24 dispelling doubts
Chapter 25 Shura Kuang Tianming
Chapter 26 incarnation channel
Chapter 27 between masters
Chapter 27 Chapter 28 exploring each other chapter 29 shameless Chapter 30 compromise? No
Chapter 31: the master explodes by himself
Chapter 32: fighting in battle
Chapter 33: Hongjun's exit
Chapter 34 Zhenling
chapter 35 Qin Si died
Chapter 36 I go to reincarnation < br