Bitcoin rebate
"Gold and silver are not money naturally, but money is gold and silver naturally." this is a sentence Marx said about money
How to understand? In fact, it is very simple that money is the inevitable proct of the development of human life. In the earliest stage, gold and silver were only used as a kind of metal or a kind of ordinary commodity to exchange things. However, with the development of society, people find that gold and silver are easy to separate, easy to preserve, easy to carry and other advantages, so the suitability of gold and silver as currency is reflected, and naturally evolved into currencyWhat about bitcoin
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
warm tips:
1. According to the notice and announcement issued by the people's Bank of China and other departments, virtual currency is not issued by monetary authorities, does not have monetary attributes such as legal compensation and compulsion, is not a real currency, does not have the same legal status as currency, and cannot and should not be used as currency in the market, Citizens' investment and transaction of virtual currency are not protected by law
2. Before investing, it is recommended that you first understand the risks existing in the project, and clearly understand the investors, investment institutions, chain activity and other information of the project, rather than blindly investing or mistakenly entering the capital market
3. The above explanation is for reference only. Investors should not use such information to replace their independent judgment or make decisions only based on such information, which does not constitute any investment operation
response time: February 5, 2021. Please refer to the official website of Ping An Bank for the latest business changes
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unlike all currencies, bitcoin does not rely on a specific currency institution to issue. It is generated by a large number of calculations based on a specific algorithm. Bitcoin economy uses a distributed database composed of many nodes in the whole P2P network to confirm and record all transactions, and uses cryptography design to ensure the security of all aspects of currency circulation. The decentralized nature and algorithm of P2P can ensure that it is impossible to artificially manipulate the value of bitcoin through mass proction. The design based on cryptography can make bitcoin only be transferred or paid by the real owner. This also ensures the anonymity of money ownership and circulation transactions. The biggest difference between bitcoin and other virtual currencies is that the total amount of bitcoin is very limited and it has a strong scarcity
warm tips: the above contents are for reference only
response time: January 20, 2021. Please refer to the official website of Ping An Bank for the latest business changes
[Ping An Bank I know] want to know more? Come and see "Ping An Bank I know" ~
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I believe many people have this idea, but in reality, there is no pie in the sky. It's more about getting rich by being down-to-earth. However, there are always exceptions. For example, some people buy lottery tickets or make investments, and the profits are hundreds of times. Today's teacher who was once thought to be a fool is just like this, He was ridiculed for buying 100000 bitcoins at the time. The generation of bitcoin only depends on a specific algorithm, which can be generated after a large number of calculations. Because the total quantity is limited, the extremely scarce bitcoin naturally becomes a direction of investment. After all, the rarity of things is the most expensive
About 400 percent
when bitcoin first appeared in 2009, one dollar could buy almost 1300 bitcoins. Before April 2011, the price of each bitcoin was always below $1. In June 2011, the highest price of bitcoin rose to $30. Then, the price almost fell within a week. In 2012, the price of bitcoin once fell below $2
further dropped to $114 on January 14, 2015. Since then, bitcoin has begun to rise again. In 2017, after the bitcoin ETF fund was rejected by the US Securities Regulatory Commission, bitcoin plummeted by $315 to below $1000. After that, it rose again. In the first four months of this year, the price of bitcoin and an ounce of gold were almost equal
However, with the strong rise of bitcoin in this round, the price of bitcoin has exceeded the price of an ounce of gold. On April 26, the price of bitcoin was $1282.97, compared with $1264 for an ounce of gold. Bitcoin has surpassed gold in price
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in 2016, there were dozens of bitcoin exchanges in the world, and the trading volume of bitcoin in most countries and regions increased sharply. Among the countries and regions with the highest growth rate, the trading volume of bitcoin in Japan is second only to China, ranking second in the world; The local bitcoin trading volume in Venezuela increased by more than 913%
South Korea has become the sixth largest bitcoin trading market in the world, Korean people can buy bitcoin from a large number of convenience stores, and korbit's trading volume currently accounts for 70% of the South Korean market; Local bitcoin transactions in Colombia increased by about 370%; Bitcoin markets in Malaysia, Russia and Australia are also developing rapidly. Bitcoin trading in China once accounted for more than 80% of the global trading volume
On September 17, Alibaba cloud released its first cloud computer "shadowless", which broke through the physical limitations of traditional computers. A "small card" has dozens of times the performance of ordinary computers
it is learned that cloud computing technology is actually used to create a remote virtual host that is the same as personal computer. When users access the network, they can get the same experience as using personal computer
Zhang Jianfeng, President of Alibaba cloud intelligence, said that in the future, everyone can have a supercomputer on the cloud, which can expand the computing power anytime and anywhere according to their needs. After large-scale promotion, it can save 50% of the computing resources for the whole society and avoid the waste of computing power
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some local governments have put forward their purchase intention:
"shadowless" cloud computer has many advantages, such as no physical host, users can save space, in addition, cloud computer adopts very secure encryption mechanism, which effectively prevents Trojans and viruses from stealing important information from users, It has the same security protection level as alicloud data center, which is very reliable
Alibaba cloud computer "shadowless" also has intelligent properties, which can combine your work interface according to your work habits, work content and intelligence, so that users can efficiently complete their work tasks as soon as they open "shadowless", greatly improving efficiency
it is reported that at present, Wuyi is only available for sale in the enterprise office market. In the future, it may provide services to indivial users, and some local governments have put forward the purchase intention
I contacted the head of one of their promotion teams in private, and I asked their founding operation team, but their reply was that they can make money and guarantee that you can make money. There is no operation and development team.