Germany confirms bitcoin as private currency
Publish: 2021-05-11 15:19:55
1. In order to understand the technical principle of bitcoin, we need to understand two important cryptographic techniques: hash code: it converts a long string into a fixed length string, and its conversion is irreversible, that is, it is impossible to guess the original string from hash code. Sha256 is mainly used in bitcoin protocol
public key system: corresponds to a public key and a private key, keeps the private key in the application and publishes the public key. When Party A transmits information to Party B, it can use Party A's private key to encrypt the information, and Party B can use Party A's public key to decrypt the information, so as to ensure that the third party cannot impersonate Party A to send the information; At the same time, when Party A transmits information to Party B, it is encrypted with Party B's public key and sent to Party B, and then Party B decrypts it with his own private key, so as to ensure that the third party cannot eavesdrop on the communication between the two people. RSA is the most common public key system, but the lliptic curve digital signature algorithm is used in bitcoin protocol. What's the difference between cash and bank account? Bitcoin is an electronic currency in BTC. In this article, it is also used to refer to the whole bitcoin system. Like opening an account in a bank, the corresponding concept in bitcoin is address. Everyone can have one or more bitcoin addresses, which are used to pay and collect money. Each address is a string that starts with 1. For example, I have two bitcoin accounts, and. A bitcoin account is uniquely determined by a pair of public key and private key. To save the account, you only need to save the private key file. Unlike bank accounts, banks keep all transaction records and maintain the book balance of each account, while bitcoin's transaction records are jointly maintained by the whole P2P network through a pre agreed protocol. How much money is in my account address? Although the current account balance can be seen by bitcoin software, unlike banks, there is no place to maintain the book balance of each address. It can only calculate the account balance in real time through all historical transactions. How do I pay? When I pay from address a to address B of the other party, the payment amount is e. at this time, both parties will announce the transaction information to each network node, telling address a to pay to address B, and the payment amount is e. In order to prevent the third party from forging the transaction information, the transaction information will be encrypted with the private key of address A. at this time, the network node receiving the transaction information can use the public key of address a to verify that the transaction information is indeed sent by address a. Of course, trading software will help us do these things, we just need to input the relevant parameters in the software. What will the network node do after receiving the transaction information? This is the most important part of the bitcoin system, which needs to be elaborated. For the sake of simplicity, only bitcoin protocol has been implemented. In the current version, each network node will save all transaction information synchronously. There are two kinds of transaction information in history, one is & quot; Verified & quot; The transaction information, that is, the verified transaction information, is stored in a series of "blocks". Each & quot; block" Is the previous & quot; bock" The ID of each block is the hash code of the hash code of the block and the new transaction information (see an actual block). The other category refers to those who also & quot; Unverified & quot; The transaction information just paid above belongs to this category. When a network node receives new unverified transaction information (possibly more than one), it can calculate the book balance of each address at that time because the node keeps all the transaction information in history, so it can calculate whether the transaction information is valid, that is, whether there is enough balance in the payment account. After eliminating the invalid transaction information, it first takes out the last & quot; block" Then, the unverified transaction information is combined with the ID, and a verification code is added to form a new "block". It needs a lot of calculation to build a new block, because it needs to calculate the verification code, so that the above combination becomes a block, that is, the first several bits of the hash code of the block are 1. At present, the first 13 bits need to be 1 (generally, the specific method is uncertain), which means that if the block is generated by enumeration method, the average number of enumerations is 16 ^ 13. Using CPU resources to generate a block is called "gold mining", because the proction of the block will get a certain reward, and the reward information has been included in the block. When a network node generates a new block, it will broadcast to other network nodes. However, this network block may not be accepted by the network, because it is possible that other network nodes have proced the block earlier. Only the earliest block or the block with the largest number of subsequent blocks is valid, and the remaining blocks are no longer used as the initial blocks of the next block. How does the other party confirm that the payment is successful? When the payment information is distributed to the network node, the network node begins to calculate whether the transaction is valid (that is, whether the account balance is enough to pay), and attempts to generate blocks containing the transaction information. When six blocks (one direct block and five subsequent blocks) contain the transaction information, the transaction information is considered "verified", so that the transaction is formally confirmed, and the other party can confirm the successful payment. A possible problem is that I will pay the balance of address a to address B, and at the same time pay to address C. If I only verify that the single comparison transaction is valid. At this point, my way of cheating is to generate six blocks including B to B and six blocks including C to C before the truth is revealed. Because I need a very long CPU time to generate a block, compared with the whole network, the probability of my cheating success is very small. What is the motivation of network nodes to proce blocks? As can be seen from the above description, in order to make the transaction information effective, the network node needs to generate 1 and 5 subsequent blocks to contain the transaction information, and such block generation is very CPU intensive. How to let other network nodes help to proce blocks as soon as possible? The answer is very simple. The agreement stipulates that BTC will be rewarded for the address where the block is proced, as well as the Commission promised by both parties. At present, the reward for procing a block is 50btc, which will be halved every four years in the future. For example, the reward will be 25btc from 2013 to 2016. Is the transaction anonymous? Yes, and No. All bitcoin transactions are visible. We can check all transaction records of each account, such as mine. But what's different from the banking monetary system is that everyone's account itself is anonymous, and everyone can open many accounts. In general, anonymity is not as good as it claims. But bitcoin has another advantage in doing black market trading: it can't be frozen. Even if the police trace a bitcoin address, there is nothing they can do unless they trace the computer used by the exchange based on the Internet address. How to ensure that bitcoin does not depreciate? Generally speaking, in the case of equivalent trading activities, the value of money is inversely proportional to the amount of money issued. Unlike the traditional money market, the central bank can determine the amount of money issued. Bitcoin does not have a central issuing institution. Only by procing blocks can we get a certain amount of BTC currency. Therefore, bitcoin's new amount of money depends on: 1. The speed of procing blocks: bitcoin's agreement stipulates that the difficulty of procing blocks is fixed at an average of 2016 every two weeks, about 10 minutes. Moore's law of doubling CPU speed every 18 months will not speed up the proction of block. 2. The number of rewards for block proction: at present, 50 BTC is awarded for each block proced, which is halved every four years. In 2013, 25 BTC is awarded, and in 2017, 12.5 BTC is awarded. Considering the above two factors, bitcoin's currency issuing speed is not controlled by any single node in the network. Its protocol makes the currency stock known in advance, and the maximum stock is only 21 million BTC
public key system: corresponds to a public key and a private key, keeps the private key in the application and publishes the public key. When Party A transmits information to Party B, it can use Party A's private key to encrypt the information, and Party B can use Party A's public key to decrypt the information, so as to ensure that the third party cannot impersonate Party A to send the information; At the same time, when Party A transmits information to Party B, it is encrypted with Party B's public key and sent to Party B, and then Party B decrypts it with his own private key, so as to ensure that the third party cannot eavesdrop on the communication between the two people. RSA is the most common public key system, but the lliptic curve digital signature algorithm is used in bitcoin protocol. What's the difference between cash and bank account? Bitcoin is an electronic currency in BTC. In this article, it is also used to refer to the whole bitcoin system. Like opening an account in a bank, the corresponding concept in bitcoin is address. Everyone can have one or more bitcoin addresses, which are used to pay and collect money. Each address is a string that starts with 1. For example, I have two bitcoin accounts, and. A bitcoin account is uniquely determined by a pair of public key and private key. To save the account, you only need to save the private key file. Unlike bank accounts, banks keep all transaction records and maintain the book balance of each account, while bitcoin's transaction records are jointly maintained by the whole P2P network through a pre agreed protocol. How much money is in my account address? Although the current account balance can be seen by bitcoin software, unlike banks, there is no place to maintain the book balance of each address. It can only calculate the account balance in real time through all historical transactions. How do I pay? When I pay from address a to address B of the other party, the payment amount is e. at this time, both parties will announce the transaction information to each network node, telling address a to pay to address B, and the payment amount is e. In order to prevent the third party from forging the transaction information, the transaction information will be encrypted with the private key of address A. at this time, the network node receiving the transaction information can use the public key of address a to verify that the transaction information is indeed sent by address a. Of course, trading software will help us do these things, we just need to input the relevant parameters in the software. What will the network node do after receiving the transaction information? This is the most important part of the bitcoin system, which needs to be elaborated. For the sake of simplicity, only bitcoin protocol has been implemented. In the current version, each network node will save all transaction information synchronously. There are two kinds of transaction information in history, one is & quot; Verified & quot; The transaction information, that is, the verified transaction information, is stored in a series of "blocks". Each & quot; block" Is the previous & quot; bock" The ID of each block is the hash code of the hash code of the block and the new transaction information (see an actual block). The other category refers to those who also & quot; Unverified & quot; The transaction information just paid above belongs to this category. When a network node receives new unverified transaction information (possibly more than one), it can calculate the book balance of each address at that time because the node keeps all the transaction information in history, so it can calculate whether the transaction information is valid, that is, whether there is enough balance in the payment account. After eliminating the invalid transaction information, it first takes out the last & quot; block" Then, the unverified transaction information is combined with the ID, and a verification code is added to form a new "block". It needs a lot of calculation to build a new block, because it needs to calculate the verification code, so that the above combination becomes a block, that is, the first several bits of the hash code of the block are 1. At present, the first 13 bits need to be 1 (generally, the specific method is uncertain), which means that if the block is generated by enumeration method, the average number of enumerations is 16 ^ 13. Using CPU resources to generate a block is called "gold mining", because the proction of the block will get a certain reward, and the reward information has been included in the block. When a network node generates a new block, it will broadcast to other network nodes. However, this network block may not be accepted by the network, because it is possible that other network nodes have proced the block earlier. Only the earliest block or the block with the largest number of subsequent blocks is valid, and the remaining blocks are no longer used as the initial blocks of the next block. How does the other party confirm that the payment is successful? When the payment information is distributed to the network node, the network node begins to calculate whether the transaction is valid (that is, whether the account balance is enough to pay), and attempts to generate blocks containing the transaction information. When six blocks (one direct block and five subsequent blocks) contain the transaction information, the transaction information is considered "verified", so that the transaction is formally confirmed, and the other party can confirm the successful payment. A possible problem is that I will pay the balance of address a to address B, and at the same time pay to address C. If I only verify that the single comparison transaction is valid. At this point, my way of cheating is to generate six blocks including B to B and six blocks including C to C before the truth is revealed. Because I need a very long CPU time to generate a block, compared with the whole network, the probability of my cheating success is very small. What is the motivation of network nodes to proce blocks? As can be seen from the above description, in order to make the transaction information effective, the network node needs to generate 1 and 5 subsequent blocks to contain the transaction information, and such block generation is very CPU intensive. How to let other network nodes help to proce blocks as soon as possible? The answer is very simple. The agreement stipulates that BTC will be rewarded for the address where the block is proced, as well as the Commission promised by both parties. At present, the reward for procing a block is 50btc, which will be halved every four years in the future. For example, the reward will be 25btc from 2013 to 2016. Is the transaction anonymous? Yes, and No. All bitcoin transactions are visible. We can check all transaction records of each account, such as mine. But what's different from the banking monetary system is that everyone's account itself is anonymous, and everyone can open many accounts. In general, anonymity is not as good as it claims. But bitcoin has another advantage in doing black market trading: it can't be frozen. Even if the police trace a bitcoin address, there is nothing they can do unless they trace the computer used by the exchange based on the Internet address. How to ensure that bitcoin does not depreciate? Generally speaking, in the case of equivalent trading activities, the value of money is inversely proportional to the amount of money issued. Unlike the traditional money market, the central bank can determine the amount of money issued. Bitcoin does not have a central issuing institution. Only by procing blocks can we get a certain amount of BTC currency. Therefore, bitcoin's new amount of money depends on: 1. The speed of procing blocks: bitcoin's agreement stipulates that the difficulty of procing blocks is fixed at an average of 2016 every two weeks, about 10 minutes. Moore's law of doubling CPU speed every 18 months will not speed up the proction of block. 2. The number of rewards for block proction: at present, 50 BTC is awarded for each block proced, which is halved every four years. In 2013, 25 BTC is awarded, and in 2017, 12.5 BTC is awarded. Considering the above two factors, bitcoin's currency issuing speed is not controlled by any single node in the network. Its protocol makes the currency stock known in advance, and the maximum stock is only 21 million BTC
2. Bitcoin is a kind of P2P digital code. Bitcoin does not rely on specific currency institutions to issue. It is generated by a large number of calculations based on specific algorithms. Bitcoin economy uses a distributed database composed of many nodes in the whole P2P network to confirm and record all transactions. The decentralized characteristics and algorithms of P2P can ensure that it is impossible to artificially manipulate the value of bitcoin by mass manufacturing
bitcoin lacks stability, so it doesn't have "inherent value", it's just a virtual proct. If we recognize its legitimacy, it will have a significant adverse impact on the banks of all countries, and even can replace the currencies of all countries. Finally, a few people will manipulate the world's monetary system, which is a very dangerous existence. It's not money. Whether it's legal or not depends entirely on whether a country recognizes it as legal or not< At present, the United States, China and South Korea all think it is not a currency. Among the big countries, bitcoin is only recognized as the "unit of account" by the German Ministry of finance, but it is only a unit of account, which does not mean that it is mainly a currency.
bitcoin lacks stability, so it doesn't have "inherent value", it's just a virtual proct. If we recognize its legitimacy, it will have a significant adverse impact on the banks of all countries, and even can replace the currencies of all countries. Finally, a few people will manipulate the world's monetary system, which is a very dangerous existence. It's not money. Whether it's legal or not depends entirely on whether a country recognizes it as legal or not< At present, the United States, China and South Korea all think it is not a currency. Among the big countries, bitcoin is only recognized as the "unit of account" by the German Ministry of finance, but it is only a unit of account, which does not mean that it is mainly a currency.
3. Germany
at the end of June 2013, after the German parliament decided that bitcoin would be tax-free if it was held for more than one year, bitcoin was recognized as a "unit of account" by the German Ministry of finance, which means that bitcoin has been regarded as a legal currency in Germany and can be used to pay taxes and engage in trade activities< In August 2013, judge Amos mazant of Texas District Court ruled in a case of bitcoin virtual hedge fund that bitcoin is a kind of currency and should be included in the scope of financial regulation
legal status
bitcoin can still be considered as legal at present. In the world, bitcoin can be regarded as a virtual commodity and protected by law; If bitcoin cannot be officially recognized as a kind of currency by law, it may bring inconvenience to the businesses and indivials who accept bitcoin in tax declaration, because the businesses who accept bitcoin will be regarded as barter transactions, and such transactions are more troublesome than ordinary transactions in tax declaration
at the same time, bitcoin, as a commodity highly similar to currency, needs to meet the demand of anti money laundering. Bitcoin needs to be included in the personal property declaration, banking anti money laundering system, anti insider trading, anti market manipulation and other systems in terms of transaction and possession. Bitcoin exchanges and storage institutions may also need government supervision and licensing. Some fast-growing bitcoin exchanges and payment service providers are actively exploring cooperation with regulatory agencies to bring bitcoin payment into the regulatory framework of anti money laundering and anti-terrorism financing by applying for licenses and actively communicating with regulatory authorities
in Europe, the European Central Bank published a report on "virtual currency architecture", and the French bitcoin trading platform obtained the PSP qualification. On December 6, 2012, the central bank wrote in the report: "this report is the first attempt to provide a basis for discussing the virtual currency system. While these systems may play an active role in financial innovation and in providing consumers with alternative means of payment, they also clearly create risks. " "Because of the small size of virtual currency systems, these risks do not affect anyone other than the users of these systems," the report added The report reviews the history of bitcoin and reviews its basic features, including currency and technical operation.
at the end of June 2013, after the German parliament decided that bitcoin would be tax-free if it was held for more than one year, bitcoin was recognized as a "unit of account" by the German Ministry of finance, which means that bitcoin has been regarded as a legal currency in Germany and can be used to pay taxes and engage in trade activities< In August 2013, judge Amos mazant of Texas District Court ruled in a case of bitcoin virtual hedge fund that bitcoin is a kind of currency and should be included in the scope of financial regulation
legal status
bitcoin can still be considered as legal at present. In the world, bitcoin can be regarded as a virtual commodity and protected by law; If bitcoin cannot be officially recognized as a kind of currency by law, it may bring inconvenience to the businesses and indivials who accept bitcoin in tax declaration, because the businesses who accept bitcoin will be regarded as barter transactions, and such transactions are more troublesome than ordinary transactions in tax declaration
at the same time, bitcoin, as a commodity highly similar to currency, needs to meet the demand of anti money laundering. Bitcoin needs to be included in the personal property declaration, banking anti money laundering system, anti insider trading, anti market manipulation and other systems in terms of transaction and possession. Bitcoin exchanges and storage institutions may also need government supervision and licensing. Some fast-growing bitcoin exchanges and payment service providers are actively exploring cooperation with regulatory agencies to bring bitcoin payment into the regulatory framework of anti money laundering and anti-terrorism financing by applying for licenses and actively communicating with regulatory authorities
in Europe, the European Central Bank published a report on "virtual currency architecture", and the French bitcoin trading platform obtained the PSP qualification. On December 6, 2012, the central bank wrote in the report: "this report is the first attempt to provide a basis for discussing the virtual currency system. While these systems may play an active role in financial innovation and in providing consumers with alternative means of payment, they also clearly create risks. " "Because of the small size of virtual currency systems, these risks do not affect anyone other than the users of these systems," the report added The report reviews the history of bitcoin and reviews its basic features, including currency and technical operation.
4. Bitcoin is a kind of digital code in the form of P2P. Bitcoin is not issued by specific currency institutions, it is generated by a large number of calculations based on specific algorithms. Bitcoin economy uses a distributed database composed of many nodes in the whole P2P network to confirm and record all transactions. The decentralized nature and algorithm of P2P can ensure that it is impossible to artificially manipulate the value of bitcoin through mass proction
bitcoin lacks stability, so it doesn't have "inherent value", it's just a virtual proct. If we recognize its legitimacy, it will have a significant adverse impact on the banks of all countries, and even can replace the currencies of all countries. Finally, a few people will manipulate the world's monetary system, which is a very dangerous existence. It's not money. Whether it's legal or not depends entirely on whether a country recognizes it as legal or not< At present, the United States, China and South Korea all think it is not a currency. Among the big countries, bitcoin is only recognized as the "unit of account" by the German Ministry of finance, but it is only a unit of account, which does not mean that it is mainly a currency.
bitcoin lacks stability, so it doesn't have "inherent value", it's just a virtual proct. If we recognize its legitimacy, it will have a significant adverse impact on the banks of all countries, and even can replace the currencies of all countries. Finally, a few people will manipulate the world's monetary system, which is a very dangerous existence. It's not money. Whether it's legal or not depends entirely on whether a country recognizes it as legal or not< At present, the United States, China and South Korea all think it is not a currency. Among the big countries, bitcoin is only recognized as the "unit of account" by the German Ministry of finance, but it is only a unit of account, which does not mean that it is mainly a currency.
5.
bitcoin is a new crime. It is usually related to crimes committed by gangland like criminal organization, illegal fund-raising, corruption, bribery and drug-related crimes. Because of the unknown source of money, the above crimes are laundered by bitcoin and legalized the illegal gains to escape the attack of public security organs. p> First, what is bitcoin
although the transaction and supervision of bitcoin is troublesome, the judicial authorities have taken counter measures. In the measures, the procuratorial organs are required to timely inform the people's Bank of China of the situation of money laundering through bitcoin found in case handling, feed back clues and put forward suggestions, which will help to enrich the supervision mode of anti money laundering, Improve regulatory measures
6.
Bitcoin (bitcoin: bitcoin) is a kind of network virtual currency, which can buy real-life goods. It is characterized by decentralization, anonymity, and can only be used in the digital world. It does not belong to any country or financial institution, and is not subject to geographical restrictions. It can be exchanged anywhere in the world. Therefore, it is used as a money laundering tool by some criminals. In 2013, the U.S. government recognized the legal status of bitcoin, making the price of bitcoin soar. In China, on November 19, 2013, a bitcoin was equivalent to 6989 yuan
on January 7, 2014, Taobao announced that it would ban the sale of Internet virtual currencies such as bitcoin and lightcoin from January 14. On February 26, 2014, Democratic Senator Joe Manchin of West Virginia issued an open letter to several regulatory departments of the federal government of the United States, hoping that relevant institutions would pay attention to the status quo of bitcoin encouraging illegal activities and disrupting the financial order, and demanded that actions be taken as soon as possible to completely ban the electronic currency. On January 11, 2017), the Shanghai headquarters of the people's Bank of China and the Shanghai Municipal Finance Office carried out on-site inspection of bitcoin China, focusing on whether the enterprise carried out credit, payment, exchange and other related businesses without permission or license; Implementation of anti money laundering system; Fund security risks, etc. On January 12, 2017, the business management department of the people's Bank of China also entered the trading platforms such as "fire coin net" and "currency bank" in Beijing
on May 12, 2017, a global outbreak of bitcoin virus madly attacked public and commercial systems! Nearly 74 countries in the world have been seriously attacked
from August 1, 2017, global bitcoin trading platform will suspend recharge and withdrawal services. Bitcoin China digital asset trading platform will stop new user registration on September 14, and all trading businesses will be stopped on September 30
7. Germany is the first country in the world to recognize bitcoin. It stipulates that citizens can use bitcoin to pay taxes or use it for other purposes. After that, France, Britain, the United States and other European and American countries have followed suit. However, in China, it is still not allowed. It can only be played on trading platforms such as fire coin and BTCC.
8. European financial thinking has always been relatively advanced, and the laws are sound, so risks can be effectively controlled. Moreover, German laws recognize bitcoin as a "financial tool" rather than a currency, which, to a certain extent, avoids its interference with the existing currency. At the same time, developed countries are aware of the inevitable spread of bitcoin, Bitcoin is proced by cryptography based on hash code algorithm. It exists in all nodes of the network. There is no central issuing institution. The number is fixed at 24 million. It will not collapse or disappear. There will be no counterfeit currency. It can directly realize cross regional one-to-one transactions without the intervention of any intermediary institutions. There are too many advantages that the existing currency can't match; However, Germany is also taking the lead in considering that bitcoin will become a tool for illegal financial activities such as money laundering and drug trafficking, so it is further improving the bitcoin law.
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