Blockchain address
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 information of bitcoin network transactions, Used to verify the validity of its information (anti-counterfeiting) and generate the next block
extended data
most blockchain public chains are limited by scalability. The biggest feature of blockchain technology is decentralization, which requires that all accounts in the network need to deal with the accounting process. Distributed accounting has high security, low misoperation rate, political neutrality and correctness
however, blockchain technology embraces these features at the same time, sacrificing scalability, unable to meet the personalized supervision, and slightly insufficient in protecting data privacy. Moreover, with the increase of the number of ledger, the interaction delay will increase exponentially, that is to say, the more ledger in the blockchain network, the higher the delay
(1) distributed ledger, that is, transaction bookkeeping is completed by multiple nodes distributed in different places, and each node records complete accounts, so they can participate in monitoring the legitimacy of transactions, At the same time, they can testify together
different from traditional distributed storage, the uniqueness of distributed storage of blockchain is mainly reflected in two aspects: one is that each node of blockchain stores complete data according to block chain structure, while traditional distributed storage generally stores data in multiple copies according to certain rules. Second, the storage of each node in the blockchain is independent and has the same status, which relies on the consensus mechanism to ensure the consistency of storage, while the traditional distributed storage generally synchronizes data from the central node to other backup nodes[ 8]
no single node can record the account data separately, so as to avoid the possibility that a single bookkeeper is controlled or bribed to record false accounts. In theory, unless all the nodes are destroyed, the accounts will not be lost, so as to ensure the security of the account data
(2) asymmetric encryption and authorization technology, the transaction information stored on the blockchain is public, but the account identity information is highly encrypted, which can only be accessed under the authorization of the data owner, thus ensuring the data security and personal privacy
(3) consensus mechanism is how to reach a consensus among all accounting nodes to determine the validity of a record, which is not only a means of identification, but also a means of preventing tampering. Blockchain proposes four different consensus mechanisms, which are suitable for different application scenarios and achieve a balance between efficiency and security
the consensus mechanism of blockchain has the characteristics of "the minority is subordinate to the majority" and "everyone is equal", in which "the minority is subordinate to the majority" does not completely refer to the number of nodes, but also can be the computing power, the number of shares or other characteristics that can be compared by computers“ "Everyone is equal" means that when the nodes meet the conditions, all nodes have the right to put forward the consensus results first, and then directly recognized by other nodes, and finally may become the final consensus results. Taking bitcoin as an example, the workload proof is adopted. Only when more than 51% of the accounting nodes in the whole network are controlled can a nonexistent record be forged. When there are enough nodes in the blockchain, this is basically impossible, thus eliminating the possibility of fraud.
(4) smart contract, which is based on these trusted and tamperable data, can automatically execute some pre-defined rules and terms. Take insurance as an example. If everyone's information (including medical information and risk occurrence information) is true and reliable, it is easy to carry out automatic claim settlement in some standardized insurance procts
At present, there is no perfect institution to supervise blockchain in China, so many formal blockchain platforms are supervised by international authoritative institutions, such as Hong Kong based domain Kingdom , which is supervised by New Zealand and licensed by the United States. Investors should also pay attention to this point when choosing platforms. They must not be fooled by fake platforms
Blockchain Yearbook: since the second half of 2016, more than 10 blockchain instrial parks have been established or will be established in China. In addition to Shanghai, Hangzhou and Guangzhou, which have been maintaining a strong momentum in the field of Finance and science and technology, other provinces and cities such as Wuhan, Chongqing, Qing and Suzhou have also laid out blockchain instrial parks Blockchain Yearbook not only summarizes the latest detailed information of global blockchain instrial parks, but also includes the support policies of local governments for blockchain
according to the blockchain Yearbook, as of the end of November 2018, the number of blockchain companies with blockchain as the main business in China has reached nearly 1000, and the instry has initially taken shape. At present, many local governments are also actively positioning blockchain technology from the instrial height, and the policy system and regulatory framework are graally developed and improved
I. blockchain Instrial Park
1. Shanghai Collaborative Innovation Center was established in the earliest but the lowest profile
in November 2016, Zhongguancun blockchain instry alliance and Shanghai Intellectual Instrial Park reached cooperation to jointly create Zhongguancun blockchain Instry Alliance Shanghai collaborative innovation center. At the same time, Shanghai intelligence instry sky blockchain incubation base and Shanghai equity trading trusteeship center were officially established, which means that China's first application blockchain incubation base is officially located in Baoshan, Shanghai
according to the regulations of the park, all kinds of enterprises registered in the park will be given a certain proportion of supporting policies according to the contribution of the enterprises
on the day of the establishment of Shanghai Collaborative Innovation Center, Shanghai Ruizi Investment Management Co., Ltd., Shanghai kuaibei Network Technology Co., Ltd. and Shanghai miaojao Network Technology Co., Ltd. entered. Nearly two years since its establishment, the low-key park has not been exposed much
2. Hangzhou has three blockchain entrepreneurial Parks: occupying the right time, favorable location and favorable people
in the 2018 government work report, the Hangzhou government explicitly listed the blockchain instry as one of the seven future instries to be cultivated in Hangzhou. At present, Hangzhou has formed three major blockchain instrial parks represented by xixigu blockchain Instrial Park, China (Xiaoshan) blockchain entrepreneurship and innovation base, and China Hangzhou blockchain Instrial Park
xixigou blockchain Instrial Park was established in April 2017, located in xixigou Internet Finance Town, Qianjiang Xixi Hejing, and invested and operated by Hangzhou urban investment asset management group
China (Xiaoshan) blockchain entrepreneurship and innovation base was established by the cooperation of China Institute of electronic technology standardization, Hangzhou Xiaoshan District People's government and China Wanxiang Holding Co., Ltd., and settled in Xiaoshan in May 2017
China Hangzhou blockchain Instrial Park, located in Yuhang District, was established in April 2018, and Li Xiaolai, the big man of the currency circle, also attended the ceremony. At the launching ceremony, Yao Yongjie, chairman of Hangzhou longlan investment, announced the establishment of xiong'an global blockchain innovation fund with a total scale of RMB 10 billion
3. Wuhan blockchain Instrial Park encourages college students to start blockchain businesses
Beijing
on November 9, 2018, Zhongguancun Management Committee, Beijing Municipal Bureau of financial work and Beijing Municipal Commission of science and technology jointly issued the "Beijing financial technology development plan (2018-2022)"
the plan brings blockchain technology into the scope of Beijing's "financial technology" development plan, actively promotes the development of underlying technologies that affect the application of financial technology functions, and improves all kinds of technology market facilities, including artificial intelligence, big data, Internet technology (mobile Internet, Internet of things), distributed technology (cloud computing, blockchain), security technology (quantum computing Biometrics, encryption technology, etc
on September 29, 2017, the Beijing Municipal Bureau of financial work and other eight departments jointly issued the implementation measures for the construction of the capital's green financial system, which mentioned the development of green financial information infrastructure based on blockchain and the improvement of the security level of green financial projects
on April 6, 2017, the Management Committee of Zhongguancun Science and Technology Park printed and issued the "ZhongGuanCun national independent innovation demonstration zone to promote the deep integration of science, technology and finance, innovation and development support fund management measures", which mentioned that financial technology enterprises should be supported to provide services for financial regulators and financial institutions, and carry out the demonstration and application of artificial intelligence, blockchain, quantitative investment, intelligent finance and other cutting-edge technologies, Improve the efficiency and convenience of financial services
enterprises shall be given financial support according to 30% of the amount of technology application contract or purchase agreement signed between financial technology enterprises and financial regulators or financial institutions, and the maximum amount of support for a single project shall not exceed 5 million yuan
on December 30, 2016, the Beijing Municipal Bureau of financial work issued the "13th five year plan for the development of financial instry in Beijing", which mentioned that blockchain should be classified as a technology of Internet Finance and encouraged the development of this technology
on August 10, 2016, Beijing Municipal Bureau of financial work issued the performance tasks of Beijing Municipal Bureau of financial work in 2016, in which Article 8 mentioned promoting the introction of Zhongguancun Internet finance comprehensive pilot scheme and the establishment of Zhongguancun blockchain alliance
Shanghai
on April 28, 2017, the Shanghai Internet Finance Instry Association issued the self discipline rules for blockchain technology application of Internet Finance practitioners, which requires blockchain technology to serve the real economy, pay attention to the balance between innovation and standardization, and security, and clarify the bottom line of financial stability and information security, Internet financial institutions applying blockchain technology should report to local regulatory authorities and instry self regulatory organizations, and actively accept instry supervision and self regulatory management. The reporting information should at least include project name, responsible person, business model, business risk, risk control measures, etc
on March 7, 2017, the development and Reform Commission of Baoshan District of Shanghai printed and issued the key points of financial services in Baoshan District in 2017. It was mentioned that the construction of Miaohang blockchain incubation base and Songnan Shanghai Internet finance evaluation center should be followed up to promote the development of financial technology companies as an important part of Baoshan financial ecosystem relying on professional teams and market forces, We should form a development model in which venture capital funds and angel investors gather actively, science and technology finance support is strong, and enterprise investment motivation is fully stimulated
On December 8, 2017, the office of the people's Government of Huangpu District and the office of the Management Committee of Guangzhou Development Zone issued the measures for promoting the development of blockchain instry in Guangzhou Development Zone, Huangpu District, Guangzhou, aiming at the instrial and commercial registration place, tax collection and management relationship and statistical relationship within Huangpu District, Guangzhou Development Zone and its entrusted management and subordinate parks, Blockchain enterprises or institutions with sound financial system, independent legal personality, and commitment not to move away from their registered and office address within 10 years, not to change their tax obligations in the area, and not to rece their registered capital shall implement incentive measures such as cultivation award, growth award, platform award, Application Award, Technology Award, financial support, activity subsidy, etc. This is the biggest policy measure in China at presenton September 25, 2017, the Shenzhen Municipal People's Government printed and issued several measures to support the development of the financial instry in Shenzhen. It was mentioned that the financial technology special award focuses on excellent projects in the fields of blockchain, digital currency, financial big data application, and the annual award amount is controlled within 6 million yuan
on August 17, 2017, Shenzhen Economic and trade and Information Commission issued the notice of Shenzhen Economic and Trade Information Commission on organizing and implementing the 2018 special support plan for information security of new generation information technology in Shenzhen strategic emerging instries, which mentioned that it is necessary to support blockchain technology
on November 3, 2016, the Financial Development Service Office of Shenzhen Municipal People's government issued the 13th five year plan for the development of Shenzhen's financial instry, which mentioned supporting financial institutions to strengthen the research and exploration of emerging technologies such as blockchain and digital currency
Chongqing
on March 7, 2018, Chongqing municipal government issued the notice on implementing and promoting the task division of the guidance on supply chain innovation and application, which mentioned that it is necessary to study the use of blockchain, artificial intelligence and other emerging technologies to establish a credit evaluation mechanism based on supply chain
on November 7, 2017, Chongqing Economic and Information Technology Commission issued the opinions on accelerating the cultivation and innovative application of blockchain instry. It is mentioned that by 2020, we will strive to build 2-5 blockchain instry bases in Chongqing, introce and cultivate more than 10 leading enterprises in the domestic subdivision field of blockchain, and more than 50 blockchain enterprises with core technology or growth type, The introction and cultivation of more than 500 middle and senior talents in blockchain will build Chongqing into an important instrial highland and innovative application base of blockchain in China
1) if it's just "blockchain", the direct network can find a good interpretation of "blockchain network"
2) if it is "blockchain technology", the network also has a good interpretation, and all walks of life are also trying to combine with blockchain technology in new fields. Maybe in the future, blockchain technology will be used correctly instead of being used to deceive people
3) if it is "blockchain information", you can go to all kinds of blockchain media or financial media, and almost every day there are relevant blockchain instry information and news reports. Such as: Babbitt, coin you finance, blocknet, golden, daily, etc
4) if it's "blockchain audio", you can go to Himalaya FM, litchi micro class, qianchat and other platforms. For example, the audio related to "voice of money", "Yu Lingxiong", "Wang Feng" and some other financial media blockchain is also good, with various dry goods and in-depth analysis
therefore, the above four points are all related to blockchain. It depends on your choice.
The most important reason why blockchain is questioned is that there is no practical application scenario, and ordinary people can't see the possible value. In the eyes of these experts, where are the most likely application scenarios of blockchain
Shuai Chu, the founder of quantum chain, said: at present, the evolution of the whole blockchain technology is still at an early stage, just like the Internet era 20 years ago. At that time, we could not imagine that there would be applications like Uber on the Internet. The development of technology would give you more diversity. The possibility is the future According to the technical characteristics of blockchain, Zeng Ming, Dean of Hupan University, gave several possible answers:1. The most important advantage of blockchain is transparent, unchangeable and distributed ledger. Some areas have never been covered by the Internet, such as acceptance bills
2. Another big advantage of blockchain is that from the perspective of smart contract, it is possible to form more efficient network collaboration at the point-to-point level. Like crowdfunding
3. In the field of innovation, blockchain will definitely be closely combined with the development of Internet of things, artificial intelligence and other fields, including cloud computing, edge computing and so on
of course, you can withdraw cash from local banks when you receive acceptance in other places you can ask the bank customer service according to the customer service of the bank
The address itself is anonymous. Ordinary people can't find it. But if you register with the exchange, the exchange has your information and blockchain address
anonymity and traceability of blockchain addresses : anyone can easily generate a large number of private keys, public keys and addresses. The address itself is anonymous, which can be further improved by multiple address transactions. But all transactions are transparent, that is to say, all transactions at one address can be checked and traced. That is to say, I can track and query all the in and out accounts and balances at the address you give
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