Mechanism of blockchain copyright tracing

1. There are many applications that have been implemented in blockchain. Although they can not be adapted to all application scenarios, there are many applications on the market, such as micro three cloud. Their blockchain integral system has many application scenarios such as e-commerce and content payment, and has been certified by many businesses.

2. Blockchain is a technology, but it is not a single technology, but the result of the integration of a variety of technologies, including cryptography, mathematics, economics, network science and so on. You can think of it as a distributed shared accounting technology, or as a database, but the database is jointly maintained by all nodes in the chain, and each node has an account book. Because the account books of all nodes are consistent, different nodes can trust each other, and there is no doubt about the data, so we all say that the blockchain has realized trust technically. For detailed professional technology, you can consult some professional technology companies, such as Jinbo technology, which focuses on the development of blockchain related procts, professional R & D team and perfect after-sales service, and you can consult by telephone.

3. 1. Pow (proof of work) workload proof
one sentence introction: the more you do, the more you get
2. POS proof of stake
in a word: the more you hold, the more you get< Pbft: practical Byzantine fault tolerance
3. Pbft: practical Byzantine fault tolerance
Introction: it provides (n-1) / 3 fault tolerance on the premise of ensuring the activity and safety< Dbft: Byzantine fault tolerant algorithm authorized by delegated BFT
Introction: dbft mechanism adopted by ant is that bookkeepers are selected by rights and interests, and then bookkeepers reach a consensus through Byzantine fault tolerant algorithm
5. Pool verification pool
is based on traditional distributed consistency technology and data verification mechanism
chainnova is a blockchain company. I feel it's very good. Although I don't know any hash algorithm, I still know a little bit.

4. 1. What is the consensus mechanism
in a decentralized structural system, because the status of all participants is equal, when there are differences, how to reach consensus becomes a problem
therefore, a well-designed and easy to operate consensus mechanism is the key to the smooth self operation of a distributed system
in short, consensus mechanism is an algorithm to reach consensus on the sequence of things in a period of time. It is a mechanism for blockchain nodes to reach consensus on block information in the whole network.

5. At present, there are four main types of consensus mechanisms: pow, POS, dpos, pool
1. POW workload proof, which is familiar with mining, calculates a random number that meets the rules through and or operation, that is, obtains the bookkeeping right, sends out the data that needs to be recorded in this round, and stores it together with other nodes in the whole network after verification
advantages: complete decentralization, free access of nodes
disadvantages: bitcoin has attracted most of the computing power in the world, and other blockchain applications using POW consensus mechanism are difficult to obtain the same computing power to ensure their own security; Mining causes a lot of waste of resources; The period of reaching consensus is long, which is not suitable for commercial application.

2. Proof of rights and interests of POS, a mechanism of upgrading consensus of pow; According to the token proportion and time of each node; It can rece the difficulty of mining in equal proportion, so as to speed up the speed of finding random numbers< Advantages: to a certain extent, it shortens the time to reach a consensus
disadvantages: mining is still needed, which does not solve the pain point of commercial application in essence

3. Dpos share authorization certification mechanism is similar to the voting of the board of directors, in which the coin holders cast a certain number of nodes to verify and account on their behalf
advantages: greatly rece the number of participating verification and accounting nodes, which can achieve second level consensus verification
disadvantages: the whole consensus mechanism still depends on token, and many commercial applications do not need token to exist

4. Pool verification pool, which is based on traditional distributed consistency technology and data verification mechanism; It is a consensus mechanism widely used in the instry chain at present.
advantages: it can work without token, and realizes second level consensus verification on the basis of mature distributed consistency algorithms (pasox and raft)
disadvantages: the degree of decentralization is not as good as that of bictin; The multi center business model is more suitable for multi-party participation

it has great advantages in using consensus mechanism to ensure data consistency (the consensus mechanism is first proposed by ripple, and the network transaction synchronization mechanism with data correctness priority. In the consensus network, no matter how the software code changes, if you can't reach a consensus, you can't enter the network, let alone fork)
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PS: a little black, although the consensus mechanism can absolutely ensure that there will be no hard bifurcation at any time. However, the disadvantage of this mechanism is obvious, that is, it is much longer than the current bitcoin network to reach a consensus with other nodes. In extreme cases, the consequences of disconnection in ripple consensus mechanism network are also very terrible

it is possible that one day after the power failure in your home, the whole system will no longer be able to reach a consensus with other rippled nodes (in fact, the consensus mechanism requires more than 80% of the nodes to acknowledge your data before your submission will be accepted by other nodes, otherwise it will be rejected by exclusive nodes), Even you can only empty all your 500 GB data and resynchronize to connect to other ripple nodes

so at present, the existing rippled end is not suitable for civil use (if it is commercial, the impact is relatively small. For example, RL's own rippled node is hosted in Amazon cloud data center. If it has no response for a long time, it can make high claims, and there is almost no break in that place except for large disasters). This is one of the aspects RL has always wanted to improve.

6.

On March 20, it was reported that recently, an all-star team composed of Grammy award winners and music procers officially launched the blockchain music right project tune to solve the problem of right protection and profit distribution that plagued the entire music instry

at present, the development and application of domestic blockchain is still in an early stage, the infrastructure of blockchain is not perfect, and the instry application is also in the exploration stage. Instry insiders suggest that we should seize the development opportunity of blockchain technology, and rationally view the implementation progress and application scenarios of blockchain technology, so as to avoid the investment risk caused by excessive speculation

7. You asked this question,
Ren Zhengfei said that in front of quantum computers,
blockchain may be vulnerable,
What do you think
because it's Ren Zhengfei, what else can I think
the other one is too cutting-edge to be seen by ordinary people.
it's a blind guess to see.
it's either right or wrong or true.

8. No.1 Pazhou Exhibition Hall, Guangzhou
the first National Congress of the people's Republic of China, the Canton Fair is located here. It is not the first place, but the second place.
Shanghai New International Expo is a grand project jointly invested by several major exhibition group companies in the world. More than n conferences are held here every year, But I still wronged him to be the second and third place in the instry
China International Exhibition Center
including the old and new pavilions. For example, Beijing machine tool exhibition, one of the world's four largest machine tool exhibitions, will hold another packaging exhibition in the new pavilions, which is also among the top three in the instry
others are like some exhibitions dominated by local pavilions
Dalian international exhibition is held in Northeast China Center Shenyang International Convention and Exhibition Center
Wuhan International Convention and Exhibition Center is located in central and South China
Cheng Qujiang International Convention and Exhibition Center is located in Southwest China, Nanning International Convention and Exhibition Center is located in East China, Wuxi International Convention and Exhibition Center is located in East China, Suzhou International Convention and Exhibition Center is located in Suzhou International Convention and Exhibition Center is located in Ningbo International Convention and Exhibition Center is located in North China, Shijiazhuang International Convention and Exhibition Center is located in Tianjin International Convention and Exhibition Center is located in South China, and Dongguan Houjie is located in the fifth place in South International Convention and Exhibition Center Shenzhen International Convention and Exhibition Center
all of the above are from the mainland
I think Taipei International Convention and Exhibition Center and Hong Kong International Convention and Exhibition Center play an important role in the world