Blockchain bank reconciliation

1.

If you want to understand the application of blockchain, you can refer to many books and opinions, such as illustrated blockchain, blockchain: reshaping the economy and the world, blueprint and guide of new economy, and articles of coin'an community, including a detailed understanding of the platform of coin'an community, with great strength

As the name suggests, blockchain is composed of block and chain. It is a new application mode of computer technology such as distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and so on. It is a kind of chain data structure that combines data blocks in order according to the time sequence, and it is a secure and reliable distributed account book that can not be tampered with and forged by means of cryptography

in 2008, in his paper bitcoin: a peer-to-peer e-cash system published by Nakamoto, he first proposed the idea of blockchain and encrypted digital currency. Starting from bitcoin, blockchain has become the underlying technology of various digital currencies

Second, the working principle of blockchain:

1. The basic concepts include: (1) transaction: one operation will change the account status once, such as adding a record 2) Block: records the transaction and status data within a specified time, which is a consensus and preservation of the current account status 3) Chain: it is composed of a series of blocks in chronological order, which is the log record of the whole state change. If you understand the working concept of blockchain, it is not difficult to understand its working principle. Suppose there is a distributed data logbook, which can only be added, not deleted or changed. Its structure is a linear chain formed by a series of "blocks" (which is also the source of the name of "blockchain"), and new data must be put into a new block to be added, The maintenance node can propose a new block, but it must go through a certain consensus mechanism to reach an agreement on the final selected block

2. Take bitcoin as an example to see the working principle of blockchain

the block of bitcoin is divided into block head and block body

Core advantages and characteristics of blockchain

1. The verification, accounting, storage, maintenance and transmission of decentralized blockchain data are all based on distributed system structure. There is no centralized hardware or management organization, and the rights and obligations of any node are equal, The data blocks in the system are jointly maintained by the nodes with maintenance function in the whole system. 2. The open and transparent 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. Security blockchain uses 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. 4. Information cannot be tampered with. Once the information is verified and added to the blockchain, it will be stored permanently. Unless more than 51% (almost impossible) 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 high. 5. Anonymity because the exchange between nodes follows a fixed algorithm, and its data interaction does not need trust (the program rules in the blockchain will judge whether the activity is effective or not). Therefore, the counterparties do not need to let the counterparties generate their own trust by disclosing their identities, which is very helpful for credit accumulation

At present, the most popular classification of blockchain is to divide blockchain into public blockchain, private blockchain and consortium blockchain according to different participants

1. Public chain: anyone can participate in the use and maintenance, and can obtain the effective confirmation of the blockchain. Public chain is the earliest blockchain and the most widely used blockchain at present, such as bitcoin blockchain. The information is completely public

if the licensing mechanism is introced, it includes private chain and alliance chain. 2. Private chain: a company or indivial only uses the blockchain technology, enjoys the exclusive write permission of the blockchain, and does not disclose the information. At present, conservative giants (traditional finance) want to experiment with private blockchain, and the application procts of private blockchain are still groping. 3. Alliance chain: it is a blockchain between the public chain and the existing chain, which is jointly controlled by multiple organizations. The use of the chain is managed with authority, which can be controlled by the manager, and also open to others according to the manager's wishes. In addition, according to the different use scenarios and purposes of blockchain, it can be divided into currency chain for the purpose of digital currency, property chain for the purpose of recording property rights, and crowdfunding chain for the purpose of crowdfunding

On May 28, Ma Huateng, CEO of Tencent, proposed the anti-counterfeiting method based on cloud integrated blockchain technology, which is far more efficient than traditional anti-counterfeiting methods. The future anti-counterfeiting verification scenario may only require users to use their mobile phones for simple scanning, and a large number of complete information based on different dimensions can be obtained

take Maotai liquor as an example:

distillery address, proction workshop, operation staff, inspector, delivery time, transportation vehicle information and driver information,

liquor year, raw material source, raw material supplier, storage warehouse number, raw material transportation vehicle and driver information,

all information can be accurately traced, permanently recorded and tampered with

the above information can be easily verified

2. Food safety issues as early as last November, Wal Mart has cooperated with IBM to track the source of food by using blockchain technology, so as to ensure the safety of food and increase the circulation of food to rece costs. For Wal Mart and other large supermarkets, it took a few days to investigate the source of problem food, After using this technology, only one item of proct information is needed to achieve accurate traceability, and important information such as food origin, inspector, supplier, logistics and transportation can quickly find problems in a few minutes. Currently, procts tracked by blockchain include packaging procts from the United States and pork from China

3. Information security

blockchain technology is promoting an information security technology revolution. (1) identity protection PKI is a common public key encryption technology in e-mail, message application, website and other communication applications. However, since the implementation of most PKI, the centralized trusted third party certification authority (CA) is used to issue, activate and store user certificates. Hackers can attack PKI to fake user identity or crack encrypted information

certcoin is the first PKI implementation of blockchain, which comes from MIT, removes the centralized authentication center, and uses blockchain as a distributed ledger for domain name and public key

pomcor company: blockchain PKI implementation path: keep the authentication center, and use blockchain to store the hash value of issued and activated certificates. Users can verify the authenticity of certificates through decentralized and transparent sources, and can also improve the network access performance through local authentication of secret key and signature based on blockchain

(2) data integrity protection

guardtime developed a secret key free signature architecture (Ksi) based on blockchain technology to replace the secret key based data authentication technology. Ksi stores the hash table of the original data and files on the blockchain, runs the hash algorithm to verify other copies, and compares the results with the data stored in the blockchain. Any data tampering will be found quickly because the original hash table is stored in millions of nodes

(3) key infrastructure protection

the "Achilles heel" of the Internet, DDoS has entered the TB era, DDoS is still the simplest weapon for hackers to bring down the big target with low cost, DNS service is the primary target for hackers to carry out large-scale destruction, but blockchain technology is expected to fundamentally solve the problem

The distributed storage of

blockchain makes hacker attacks lose focus. Nebulis is developing a distributed DNS system, which uses Ethereum blockchain and interstellar Internet file system (IPFs, the distributed substitute of HTTP) to register and resolve domain names. The biggest weakness of DNS is caching, which makes DDoS attacks possible. It is also the bane of the centralized government's censorship of social networks and manipulation of DNS registration. A highly transparent and distributed DNS system can effectively prevent any entity, including the government, from arbitrarily manipulating records

(1) digital currency: improve the convenience of currency issuance and use, such as bitcoin and Ethernet in foreign countries, and guorenbao in China

from the use of physical transactions, to physical currency and credit currency, and then to the rise of bitcoin network, more and more people are aware of the distributed ledger blockchain technology behind it, and graally apply it in many scenarios other than digital currency

(2) cross border payment and settlement: realize point-to-point transaction, rece intermediate fees

transfer and payment. At present, the most mature application of blockchain technology is payment and transfer. Blockchain technology can avoid complicated systems, save the process of inter-bank reconciliation and review, and accelerate the settlement speed; Virtual currency can rece transaction costs without the intervention of clearing house. Different countries have different clearing proceres. It takes two or three days for a single remittance to arrive, which is inefficient and accounts for a large proportion of funds in transit. No longer through the third party, through the blockchain technology to form point-to-point payment. By eliminating the link of the third-party institutions, we can make full day payment, real-time payment, withdraw cash quickly and rece the hidden cost, which helps to avoid the capital risk. It is timely and convenient

(3) bills and supply chain financial business: rece human intervention, rece costs and operational risks

value transfer between point-to-point, control and verify physical bills or central system; Intermediaries will be eliminated and human intervention reced. With the improvement of efficiency, financing channels are more unblocked, risks are lower, and multiple parties benefit

(4) securities issuance and Trading: realize quasi real-time asset transfer, accelerate the speed of transaction clearing

the application of blockchain technology can make the process of securities trading more concise, transparent and fast, rece the plication of IT system, and improve the efficiency of market operation. For stocks, blockchain can eliminate paper and pen or electronic form records, rece human errors in trading, and improve the transparency and traceability of trading platform. Citigroup and Nasdaq cooperate to promote blockchain applications

(5) customer credit investigation and anti fraud: rece the cost of legal compliance, prevent financial crimes

the customer information and transaction records recorded in the blockchain help banks identify abnormal transactions and effectively prevent fraud. The technical characteristics of blockchain can change the existing credit reference system, and store the data of customers with bad records in the blockchain when the bank concts "know your customer" (KYC)

equity crowdfunding:

2. It's a way to solve many formality problems. Blockchain is decentralized and transparent. Now many payment channels are studying blockchain technology, maiteng

3. Imapp2.0 version of blockchain application center has been officially launched
imapp2.0 version of blockchain application center has been officially launched. Imapp is the world's first blockchain app store with universal dividends, which aims to create a super entrance to the blockchain instry and make it easier for users to use blockchain applications. The interface of imapp 2.0 is more concise and beautiful, the function adds news and DAPP, and the content enriches the guessing game. Through imapp, users can browse, forward, download, update and open the application to obtain imapp ecological token IA. The official imapp has reached a strategic cooperation with the bitcoin diamond foundation. Ecocard ia can exchange bitcoin diamond BCD at a certain proportion.

4.

As a traditional financial institution, banks are the most active Pathfinder in the field of blockchain. In recent years, many banks at home and abroad have applied blockchain technology to credit, clearing and other fields. The unique trust mechanism of blockchain is regarded by banks as a key technological breakthrough in innovating risk management and simplifying transaction process. However, as an emerging technology, blockchain ecology is still in the process of establishment, and its application is very limited. Many problems still need to be solved graally in the development

"at present, blockchain can't run high-frequency and concurrent transactions, and network speed and computing power can't support it. For example, in the field of payment, if it is online shopping, it can be realized; If it's high-frequency futures trading, it can't be done. " Huang Zhen said

JIANG Peng said that at the beginning of designing the blockchain system, China CITIC Bank carefully demonstrated the business links suitable for the use of blockchain

"from the global experience, it is not suitable to use blockchain to build a large and complex system. Instead of trying to solve all problems with blockchain, we should focus on solving the core problems. It's time-consuming to build a too complex system. The technology is developing so fast that before the old system is finished, it will face the iteration of new technology. " Jiang Peng said

the idea of "only solving core problems" ensures that after the blockchain goes online, the relevant business operations of branches of China CITIC Bank can be upgraded without process transformation

Fan Bin said frankly that it will take time for banks to fully apply the blockchain, and IBM's investment in the blockchain open source community will continue, on the one hand to cultivate the market, on the other hand to compete for the commanding height of the blockchain platform. With the rapid iteration of blockchain technology itself, there is still a lot of imagination for financial institutions to use this new technology

the content comes from Xinhuanet

5. Instry application of Newton
1) Chain retail: under the corporate organizational structure, capital gains have far exceeded labor gains. With the development of computer and Internet, a new generation of giant retail institutions accelerate the accumulation of wealth to capital. Chain business is the basic business model of human-computer community, and any behavior that has a positive contribution to human-computer community will be encouraged. The application of chain business model in the retail instry is concive to recing transaction costs, protecting consumer privacy and promoting intelligent cooperation
newmall: in the online mall of newmall, because there is no profitable commercial intermediary, the transaction cost of the seller will be greatly reced, and consumers, service providers and other participants can get the incentive of Newton's pass according to the contribution value (newforce)
new digital asset management: as a new digital asset of users, consumption data can be managed through tools such as newpay. Users really own the data, carry out authorization control, pricing and charging, and eliminate the data disclosure without knowledge
targeted advertising: users can set whether to accept marketing, as well as the required information type and price range through newpay and other tools. Advertisers set marketing plans through various marketing smart contract templates built into the system, including target users, incentive mode, settlement method, dynamic price adjustment rules, etc. Advertisers can accurately put in advertisements, make point-to-point settlement with users, and eliminate advertising fraud< br />2 Payment: the current payment cost is high, the efficiency is low, and the flexibility is poor. Through blockchain and other technologies, we can build a new generation of transaction and payment system. Internet of things devices based on newiot technology can access newchain at a very low cost. Smart contracts can be established between devices to realize automatic settlement and payment, meeting the high-frequency requirements in this scenario
Global Payment: through the global distribution of newchain infrastructure and newpay payment tools, cross-border transactions are simple and convenient, and the cost is extremely low
3) supply chain: goods are usually delivered to consumers through logistics, warehousing, customs clearance, sales and many other links. When there is after-sales service, there will be a corresponding reverse process. The current supply chain is basically opaque, and it is difficult for consumers to confirm the origin and circulation information of goods. For some instries, such as food, medicine and luxury goods, this is a big problem. Therefore, a transparent and credible supply chain system for all stakeholders is very important
through the combination of atomic hash, newiot, newchain and other technologies, the supply chain system will be credible, open and transparent, and generate more business innovation
4) self financing: the traditional financial service system has the characteristics of heavy workload, long cycle, high cost and poor flexibility, which is usually difficult to serve small and medium-sized enterprises and indivials. Through digital identity and credit, a new self financing system can be established
enterprise and indivial credit: enterprises and indivials establish a consistent credit system based on newid. Only after authorization, can a third party obtain credit records
Asset Securitization: through the smart contract template, financial organizations can create financial procts without human participation. Through the relevant token tools based on newchain, all kinds of assets can be easily valued or transformed into token on the chain
5) gaming: by combining with blockchain technology, a new game experience can be created: users are both players and rule participants, and virtual game assets are owned by users
automatic transaction of virtual game assets: through the cross chain and Oracle technology provided by newchain, the virtual items in various games can be easily recorded on the blockchain, and the automatic transaction can be realized
game with transparent rules: game developers can easily establish algorithm transparent game logic through newchain related smart contract tools to improve the fairness and transparency of the game
6) agriculture: Currently, there are many problems in agriculture, such as incomplete data and low degree of automation. Block chain combined with Internet of things technology can automatically collect, store and analyze proction data, save the high maintenance cost of centralized management system, rece the later maintenance cost, and help to improve the intelligent and large-scale level of agriculture
traceability of agricultural procts: by introcing the Internet of things equipment compatible with newiot standard into the process of agricultural means circulation, agricultural proction and agricultural procts sales, the safety and efficiency of the whole process of agricultural proction can be improved. Due to the non tampering characteristics of proction data, it can be widely used in scientific research and anti-counterfeiting purposes
intelligent planting: through the Internet of things sensor compatible with newiot standard, it can realize the all-weather monitoring of the planting environment and crop growth. Combined with newai, it can make intelligent decisions on the monitoring results, and build a complete set of intelligent planting system, which can discover risks in time, stabilize proction and increase income
7) public welfare: with its characteristics of decentralization, high transparency and tamper proof information, blockchain technology naturally meets the needs of the public welfare field. Public welfare organizations can store the whole process information from fund-raising, project progress, use of donation and feedback from recipients on newchain for the convenience of donors and the public< Public welfare audit: public welfare activities need public welfare audit to improve efficiency and maintain trust. Through newchain, newid and other technologies and agreements, every donation will be traceable. Public welfare institutions can track the later situation of the relief objects through relevant tools, which helps to enhance the fairness and transparency of public welfare
wildlife protection: using newiot technology, the data of rare wildlife resources can be recorded on newchain, so as to track the location, body index, etc. of each specific animal, providing key information help for migration scientific research tracking, combating poaching and trafficking.

6.

Distributed accounting technology is a database distributed on multiple nodes or computing devices. Each node can and save a ledger, and each node can update independently. Its feature is that the ledger is not maintained by any central organization, and the update of the ledger is built and recorded by each node independently

The

node can vote on these updates to ensure that they are in line with the majority opinion. This kind of voting is also called consensus, and consensus is automatically reached through the algorithm. Once a consensus is reached, the distributed ledger will update itself, and the latest agreed version of the ledger will be saved on each node

distributed accounting technology solves the problem of trust cost, which is less dependent on banks, government and Justice Department, and the data is all on nodes. At the same time, it also solves the problems of consumer rights, financial integrity and transaction speed

extended data:

distributed ledger is a kind of database shared, copied and synchronized among network members. Distributed ledgers record transactions between network participants, such as the exchange of assets or data. This shared ledger eliminates the time and expense of mediating different ledgers

distributed ledger (also known as shared ledger, or distributed classification technology) is a replication consensus, sharing and synchronizing digital data geographically distributed in multiple websites, countries, or institutions. There is no central administrator or centralized data storage.

a point-to-point network is required, and consensus algorithms are used to ensure replication at nodes. A form of distributed classification design, blockchain system, can be public or private

but not all distributed accounts must use chain blocks to provide security and effectively realize distributed consensus: blockchain is just a type of data structure, which is considered as a distributed ledger. In 2016, many banks tested the balance of payments account

the participants in the network restrict and negotiate the updating of the records in the account book according to the consensus principle. There is no intermediate third-party arbitration institutions (such as financial institutions or clearing houses) involved. Each record in the distributed Ledger has a time stamp and a unique password signature, which makes the ledger an auditable history of all transactions in the network

7. Bank to bank cooperation and bank to non bank cooperation may require reconciliation. In the past, batch reconciliation will be used, which generally takes T + 1 and T + 2 time to complete. If every transaction, whether the details of loan or repayment, is sent to the blockchain, there is a common mechanism on the chain, so that the accounts seen by multiple parties are accurate, correct and recognized by multiple parties, This plays the role of transaction reconciliation, and the reconciliation speed can be shortened to t + 3S (seconds).

8. (1) The settlement and transfer problems of cross-border banks result in low efficiency and become the main problems in the payment instry. With the implementation of point-to-point technology in the blockchain and the distributed ledger and consensus algorithm in the blockchain, the traders can jointly maintain the same account book and share it among multiple parties< (2) banning the third-party supervision. Based on the transaction settlement function of blockchain, both parties can reach an agreement directly in the transaction process without reconciliation, and eliminate the dependence on CCP or other third-party institutions
(3) blockchain can solve the reconciliation problem between different securities agencies.