60btc

2. 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

3. The concept of bitcoin was first proposed by Nakamoto on November 1, 2008, and was officially born on January 3, 2009. According to the idea of Nakamoto, the open source software is designed and released, and the P2P network on it is constructed. Bitcoin is a virtual encrypted digital currency in the form of P2P. Point to point transmission means a decentralized payment system
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

according to the notice on preventing the financing risk of token issuance, there is no approved digital currency trading platform in China. According to China's digital currency regulatory framework, investors have the freedom to participate in digital currency transactions at their own risk

warm tips: the above information is for reference only. Before investing, it is recommended that you first understand the risks existing in the project, and understand the investors, investment institutions, chain activity and other information of the project, rather than blindly investing or mistakenly entering the capital market. Investment is risky, so we should be cautious when entering the market
response time: December 28, 2020. Please refer to the official website of Ping An Bank for the latest business changes
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4.

1. The price of BTC and eth you see on this platform is not the real price against the US dollar, but the price in usdt, which is priced in OTC legal currency. Their ups and downs are all calculated in terms of usdt. All three of them are virtual currencies, just currency transactions, not real dollar prices

2. Usdt is a complete domestic counterfeit currency, formerly known as realcoin, but it has just changed its name. Realcoin is the second generation of domestic counterfeit currency, and the first generation is called chncoin Chinese currency. Both of them collapsed successively in 2013 and 2014

3. The actual value of usdt can be said to be equal to 0. Teda Company, which issued usdt, stopped providing any services to American citizens, that is to say, Teda Company could not provide usdt to us dollar

extended information:

1. Fire coin is a safe and reliable bitcoin trading platform in China. It has won a round of ten million RMB capital investment from Zhenge fund, Dai Zhikang, Sequoia capital (shareholders of many world-famous companies such as apple and Alibaba). Fire coin implements strict risk control management and operates stably. As of the end of 2016, the accumulated turnover of fire currency reached 200 billion yuan

2. In the future, fire coin will mainly focus on overseas transactions. Founder Li Lin said in an open letter that he is currently carrying out five major businesses around the world, including fire coin global professional station, fire coin Korea, fire coin China, fire Coin Wallet and fire coin global dollar station. Among them, fire coin China focuses on blockchain technology R & D and application information, while fire coin Korea and fire coin global dollar station will continue to provide local legal currency to digital currency digital asset trading services

5.

The current price of bitcoin is around $10000, but the price of bitcoin fluctuates a lot. At present, 1 bitcoin is equal to 4381 yuan, 10000 bitcoin is equal to 438100000 yuan

some people make money, others lose money. Many people take him as a hot investment. You can still make money by learning more. The third sharp rise and fall, 2017 to now this period is the most important two years of bitcoin, because bitcoin in 2017 a year, from 789 dollars, up to 19878 dollars. 24 times. Compared with the birth price of bitcoin, it has increased by 20 million times

reason: in this year, the underlying technology of bitcoin, blockchain technology, rose strongly, driving the value of bitcoin soaring. At the same time, the outbreak of Ethereum's ICO triggered the surge of bitcoin. Twenty thousand dollars, which makes many people become local tyrants overnight

now it's not only speculators. People on the earth know about bitcoin, which will surely attract more vampires, but also the murderous eyes of many countries. No, it is estimated that the long bear market rarely seen in the history of bitcoin is coming

since December 17, bitcoin has been in a bear market, falling from $20000 to more than $6000. The decline of 60% makes many people begin to doubt life. There are many reasons for this decline. Global regulation has become stricter, exchanges have been attacked all the time, and the vulnerable hearts of investors are under heavy pressure

6.

1. Q coin

Q coin, referred to as QB, also known as QQ coin, Tencent Q coin, etc. Usually its exchange rate is 1q currency = 1 RMB, with Tencent paipai net transactions are generally 10% off

QB is a virtual currency launched by Tencent, which can be used to pay for QQ bank number, QQ member service and other services. Tencent q-coin, through the purchase of QQ card, telephone recharge, bank card recharge, network recharge, mobile phone recharge card, one card recharge card and other ways to obtain

The face value of QQ card is 10 yuan, 15 yuan, 30 yuan, 60 yuan, 100 yuan and 200 yuan respectively

there is another kind of electronic cryptocurrency, qqcoin, which is not related to each other

2. Litecoin

litecoin, abbreviated as LTC, currency symbol: Ł; It is a kind of network currency based on "peer-to-peer" technology. It is also an open source software project under MIT / X11 license. It can help users make instant payments to anyone in the world

lightcoin is inspired by bitcoin (BTC) and has the same implementation principle in technology. The creation and transfer of lightcoin is based on an open source encryption protocol and is not managed by any central organization

3, infinite coin

infinite coin (hereinafter referred to as IFC) is a new digital currency, which has more circulation advantages than bitcoin, and fills the short board of bitcoin in the field of commercial circulation and promoting commercial operation. The positioning of unlimited money is to serve the daily life of small transaction payment

one transaction of infinite coin needs three confirmations, each confirmation takes three seconds, and the transaction confirmation speed is very fast. Because bitcoin transaction needs 6 confirmations, which takes about 1 hour, and lightcoin transaction takes 15 minutes, infinite coin is used in daily common transactions, which is more practical

infinite coin was released on June 5, 2013. Based on scrypt POW algorithm. A block is generated in 30 seconds. In the initial block, there are 524288 infinite coins in each block. After that, for every 86400 blocks generated, the number of coins in the block is halved, with a total of 90.6 billion. The difficulty of mining is adjusted every hour

Quark coin is not the currency in real life, it exists safely in the computer of global network

quark network is protected by six most advanced encryption algorithms to ensure that it can become a digital ledger. The whole network uses each of the six functions to generate a proof of work, and the coin maker must "verify" these transactions to ensure that each coin increase is real and effective

only regular computer can participate in ensuring that it can maintain a highly secure peer-to-peer network, which makes it more decentralized

quark coins can only be g up through the CPU of regular computers. In the first 36 weeks, a total of 247605120 quark coins will be g out. Since March 30, 2014, the annual quark coins set at 1050000 can enter the market through "digging", and the block reward will never be less than one, which is currently two

Zetacoin is an open-source digital currency based on SHA-256 algorithm. The initial coin mining is 160 million coins, and the subsequent annual inflation is a better incentive, To keep the hash of the network is not pure transaction cost

The total number of

zetacoin is 160 million, 1000 zets per block and half of 80640 zets per block

7.

According to the currency conversion ratio on October 22, 2020, one bitcoin = 86214.10 RMB

compared with fiat money, bitcoin does not have a centralized issuer, but is generated by the calculation of network nodes. Anyone can participate in the manufacture of bitcoin, and it can circulate all over the world. It can be bought and sold on any computer connected to the Internet. No matter where they are, anyone can dig, buy, sell or collect bitcoin, And in the transaction process, foreigners can not identify the user's identity information

whenever bitcoin comes into the view of mainstream media, mainstream media always ask some mainstream economists to analyze bitcoin. Earlier, these analyses focused on whether bitcoin was a scam. Now the analysis focuses on whether bitcoin can become the mainstream currency in the future. The focus of the debate is often on the deflationary nature of bitcoin

extended information:

purchase method:

users can buy bitcoin, at the same time, they can also use the computer to "mine" bitcoin according to the algorithm. When users "mine" bitcoin, they need to use the computer to search for 64 bit numbers, and then compete with other gold miners by repeatedly solving puzzles to provide the required numbers for the bitcoin network. If the user's computer successfully creates a set of numbers, then they will get 25 bitcoins

e to the decentralized programming adopted by the bitcoin system, only 25 bitcoins can be obtained every 10 minutes, and by 2140, the maximum number of bitcoins in circulation will reach 21 million. In other words, bitcoin system is able to achieve self-sufficiency, resist inflation through coding, and prevent others from destroying these codes

8. Hello
the latest price is now
1 bitcoin = US $10000 in August 2019, and the exchange rate is RMB 70429.00
at present, the market is in an extremely unstable state, which may fall at any time, and the hope of rising is very small. It is suggested to make an appropriate move and find an overseas anonymous exchange agency, btccas, which is what I know
thank you!

9. Hello, the blanking size of the cylinder of pressure vessel, taking the circular cylinder as an example, can be expanded according to the middle diameter, that is, the inner diameter of the cylinder plus the wall thickness of the cylinder, and then the cutting or machining allowance is the blanking size
for example, for a cylinder section with 1m inner diameter, 500mm long and 16mm thick, after blanking, it is necessary to leave 20mm allowance in the length direction, then the blanking calculation size is: Expanded (1000 + 16) * 3.14 = 3190
final blanking size: 3190 * 520

10. Bitcoin's offer has been falling (by the way, it hasn't fallen yet), and some people are wondering - what's the bottom line of bitcoin's offer? Is there a quotation point, once it falls, it will stop by itself? It happens to be interesting to study such a monetary value in the inflation market
generally speaking, the value of money depends on its activity: the central bank prints a lot of money and puts it into the economy with high-speed monetary activity. Therefore, we find that if the value of money decreases, we will be more inclined to sell in the future, resulting in a further decline in the quoted price. This cycle will lead to a runaway effect
for bitcoin, there is no high speed activity of bitcoin. Only the speculative bubble burst, and the quotations get closer to the mall balance point. This leads to a humorous question: where is the balance? First of all, let's make some assumptions. If in the future, no one in the world will hoard bitcoin at all: no one believes that bitcoin will rise, but will only fall in the future. Therefore, in the near future, we will only purchase procts by purchasing just enough bitcoin. In this way, the quotation of bitcoin depends entirely on the demand (the amount of bitcoin that people spend on purchasing procts and services) and the supply (the amount of bitcoin that exists). We are going to test to set up a lower bound: there will be some conjecture data in it, so we are going to choose the more extreme (disappointed) data. Data results are relatively small, and are affected by many factors, but data results can let us roughly know the magnitude of the answer to the question. In addition, we have the same assumption that everyone has lost interest in all counterfeit coins: we only pay attention to the bitcoin quotation supported by the bitcoin demand brought by real procts and services, that is to say, we do not use the statistical data of business channels to count the demand
let's get started. It is an excellent representative of the total demand of bitcoin for procts and services. It is the total activity of coinbase and bitpay, the two largest bitcoin payment processors in the bitcoin instry. Of course, bitcoin for procts and services also occurs in other places (this does not include the bitcoin compensation paid by some companies). The total bitcoin traffic of these two payment processors can exceed 50% of the bitcoin demand in all bitcoin businesses: the service of all large-scale commercial bitcoin transactions is coinbase or bitpay
surprisingly, neither coinbase nor bitpay clearly revealed their detailed business data. Fortunately, we can make a reasonable and accurate guess about the implied meaning of some articles announced by them. For example, we know that bitpay's business volume in 2013 was $100 million, and we also know that its business volume in 2012 was $3 million. Bitpay was founded in 2011, so we can reasonably guess that the total business volume of bitpay at the end of 2013 will be at least $94 million. Coinbase didn't disclose similar data, but both sides made clear the detailed number of cooperative businesses: bitpay is "more than 30000 businesses", coinbase is "31000 businesses". If we assume that the average bitcoin business volume of each of the two payment processors is similar, then the revenue of coinbase and bitpay are very similar. Let's calculate according to this. They are all US $100 million per year, or the remaining 50% of bitcoin needs that do not flow through coinbase and bitpay will bring us $300 million per year. In fact, since it is almost certain that there will be a continuous increase in 2014, these figures are likely to be higher. Since it is difficult to evaluate the detailed increase, let's leave it alone and simply assume that it will be $300 million in 2014
according to the current quotation of bitcoin (US $474), the total value of bitcoin mall is about US $6 billion, so US $300 million only accounts for 5%. That is to say, 95% of the total demand for bitcoin is speculative. Therefore, our estimation of the lower bound of bitcoin price is 23 US dollars. At this moment, the natural market's strength will prevent the price from further falling
let's analyze the above achievements reasonably. Our approximate data comes from bitpay and coinbase's bitcoin traffic (2013), and the bitcoin traffic of the three major business channels is accounted for by the partners working in coindesk. The channel traffic of bitcoin business is mainly speculative business (and counterfeit money business), which can hardly represent the business needs of bitcoin brought by any procts and services. At the same time, the three major business channels in the world (Mt. GOx, bitstamp, btc-e) account for 93% of the total amount of bitcoin shopping malls, and 7% are not included. We think that it is appropriate for the real commercial bitcoin demand to account for 5%
but will bitcoin really fall to $23? Very likely not. Let's assume that bitpay and coinbase did not increase in 2014, which is 100% wrong. Overstock, a US online retailer, Dell, a global PC retailer, and Xindan, a US e-commerce channel, announced in 2014 that they had accepted bitcoin payment, so the real amount could be several times higher. In addition, no one can store bitcoin and counterfeit coins at all. Therefore, this achievement is likely to be far lower than the low bound of the actual quotation, but it also gives us a general idea of where the equilibrium point of the market can exist, and the current bitcoin quotation is actually unsustainable.