30 person closed door meeting of blockchain

2.

Blockchain includes public blockchain, joint (instry) blockchain and private blockchain. Public chain point-to-point e-cash system: bitcoin, smart contract and decentralized application platform: Ethereum

blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies

blockchain is an important concept of bitcoin. In essence, it is a decentralized 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 a batch of bitcoin network transaction information, Used to verify the validity of its information (anti-counterfeiting) and generate the next block

extended data

according to the different degree of blockchain network centralization, three kinds of blockchains under different application scenarios are differentiated:

1. The blockchain with the whole network open and without user authorization mechanism is called public chain

2. The authorized nodes are allowed to join the network, and the information can be viewed according to the authority. It is often used in the inter agency blockchain, which is called alliance chain or instry chain

3. All the nodes in the network are in the hands of one organization, which is called private chain

alliance chain and private chain are also called licensing chain, and public chain is called non licensing chain

blockchain features

1, decentralization. Blockchain technology does not rely on additional third-party management institutions or hardware facilities, and there is no central control. In addition to the self-contained blockchain itself, each node realizes information self verification, transmission and management through distributed accounting and storage. Decentralization is the most prominent and essential feature of blockchain

2. Openness. Blockchain technology is based on open source. In addition to the private information of all parties involved in the transaction is encrypted, the data of blockchain is open to everyone. Anyone can query blockchain data and develop related applications through the open interface, so the information of the whole system is highly transparent

3. Independence. Based on consensus specifications and Protocols (similar to various mathematical algorithms such as hash algorithm used by bitcoin), the whole blockchain system does not rely on other third parties, and all nodes can automatically and safely verify and exchange data in the system without any human intervention

4. Safety. As long as 51% of all data nodes cannot be controlled, the network data cannot be arbitrarily manipulated and modified, which makes the blockchain itself relatively safe and avoids subjective and artificial data changes

5. Anonymity. Unless there are legal requirements, technically speaking, the identity information of each block node does not need to be disclosed or verified, and the information can be transferred anonymously

3. There should be no big blockchain meeting in Beijing on October 27. However, there was a science and Technology Finance Conference on blockchain in Shanghai on October 27 and 28

the participating enterprises or teams include Wanda, decent, sesame credit, latte finance, bitcoin China, etc.

4. During September 4-7, 2019, CIOE will hold relevant meetings. The following is an introction to the 2018 Asia Pacific blockchain and artificial intelligence Innovation Forum exhibition last year. I believe that the exhibition in 2019 will be more professional and breakthrough
APCA (Asia Pacific cloud application alliance) and bcai (Asia Pacific blockchain and artificial intelligence innovation and Application Research Institute) will jointly hold the "2018 Asia Pacific blockchain and artificial intelligence Innovation Forum (Shenzhen)" in the conference hall of hall 3 of Shenzhen Convention and Exhibition Center on the afternoon of September 6, 2018 (Thursday)

blockchain block chain is considered to be the fourth generation of disruptive core technology after steam engine, electric power and Internet. As a machine for building trust, blockchain will completely change the way of value transmission of the whole human society, making the information internet a value Internet

blockchain is of revolutionary significance. It will reshape the fulcrum of the world economy. Because it uses decentralized disruptive technology, it can "reshape instry services and business architecture". As the most popular vocabulary, blockchain technology has rapidly gathered the high focus of the government, science and technology and financial circles

in 2016, the Chinese government wrote "artificial intelligence and blockchain" into the 13th five year plan, and blockchain technology was listed in the National Informatization Plan of the Chinese government for the first time. At the present stage, AI and blockchain technology are paid more and more attention by government agencies and international organizations. In 2018, artificial intelligence will affect our lives in a tangible way. In 2018, artificial intelligence will become the mainstream and begin to influence all aspects of our lives in a truly ubiquitous and meaningful way

in order to further promote the innovative application and development of blockchain technology and artificial intelligence technology, let blockchain technology serve the real instry and digital economy, further promote the instrialization process of blockchain technology and artificial intelligence technology, and serve the public entrepreneurship and innovation, APCA and bcai will invite BC and AI experts from Silicon Valley, Singapore, Hong Kong, Tokyo, Beijing, Shanghai, Guangzhou and Shenzhen as well as manufacturers of excellent technologies, procts and solutions to participate in this forum, The forum will exchange and introce the relevant innovative applications and development trends with the participants, so as to help enterprises better participate in the field of blockchain applications and artificial intelligence applications and obtain greater development opportunities. At the same time, interpret the pitfalls and opportunities in the application, and help enterprises realize the marketization and digital capitalization of blockchain technology and artificial intelligence technology procts
nowadays, the innovative application of blockchain is a great force. It can provide a trust tool to expand the global business opportunities of enterprises
nowadays, the innovative application of artificial intelligence is an outlet, which can provide an intelligent service and facilitate people's work and life
when blockchain 3.0 / 4.0 comes, are you still hesitating and waiting
when neural network computing is applied, you haven't got on the bus yet

the future has come, are you here?

5. How to reach a consensus on decentralized networks
in the blockchain system, there is no centralized bookkeeping institution like a bank, so it is very important to ensure the consistency of each transaction on all bookkeeping nodes, that is, to make the whole network reach a consensus. The consensus mechanism solves this problem
at present, the main consensus mechanisms are workload proof mechanism POW and equity proof mechanism POS
POW determines your chances of getting bookkeeping rights by evaluating your workload. The greater the workload, the more likely you will get this bookkeeping opportunity
POS determines your chances of getting bookkeeping rights by evaluating the number and ration of tokens you hold. This is similar to the stock dividend system, holding a relatively large number of shares can get more dividends
the principle of dpos is similar to that of POS, except that some "deputies to the National People's Congress" are selected. The main difference from POS is that the node elects several agents, which are verified and recorded by the agents
with the development of technology, more advanced consensus mechanisms may emerge in the future.

6. impossible. If it could, it would not be safe for a long time, and it would not cause so many cases
it's not a file, it's not that simple. Simplicity is not safe for the owner.

7. Bitcoin plate is big, equivalent to the stock market, I think it is not suitable for novices. virtual currency is still worth playing now. For example, the flow of virtual currency is relatively small, which is more suitable for people who are not willing to save and who are not willing to take too much risk.

8. China's stock market is a policy market. The boss has already mentioned it, and of course he should respond positively. Without hype, where will the boss face
besides, blockchain is a very cutting-edge technology at present. China must pay attention to it, and the boss's instructions are timely and necessary.

9. No. Now the communication instry is developed, but personal information leakage is serious. It's normal to have such worries, which shows that people's self-protection awareness has improved. But the proct source chain is a high-tech, using the blockchain encryption technology, will completely encrypt the user's personal information, protect the security of the user's personal information, so, don't worry about this.