How to sign bitcoin

1. Ah, the transaction logic of bitcoin is generally based on a principle of a blockchain, and then as we say, it is a buy and buy out of content

2. The digital signature in bitcoin is generated by the initiator in the transaction. In order to ensure that this transaction is initiated by this person, and the data is not tampered with ring transmission. Digital signature is simply a complete transaction information, compressed into a fixed format string by digital digest technology, and then generated a private key by asymmetric encryption technology. The complete transaction information and digital signature are sent to the miner. The miner decrypts the digital signature with the public key of the transaction initiator. If the decryption is successful, the transaction data will be written into the block.

3. Bitcoin has no support. As long as someone wants it, bitcoin can be used as a general equivalent and can be used by businesses. It has no value in itself. Bitcoin is not a standard currency. Gold and silver are naturally currencies. It means that gold and silver can be used as a general equivalent and it has value in itself. Bitcoin, in fact, is a credit that supports it, but this credit can be turned into not worth a hair.

4. There are four common trading forms of bitcoin: spot, futures, options, ETF

1, spot trading
spot trading and stock trading are almost the same, buy low and sell high, earn the middle price difference! However, bitcoin is a T + 0 mode, trading anytime and anywhere, and there are no opening, closing, suspension and many other restrictions. It is open to trading 365 days a year

2. Futures trading is often referred to as contract trading. I believe most people can't resist the temptation of contracts. Contracts can be long and short, and can also be leveraged. The maximum support is 100 times, which indirectly magnifies the benefits and risks by 100 times, because human nature is inherently greedy. However, the difficulty coefficient of making money in the contract is high. Because bitcoin fluctuates greatly, it is possible to burst the position in an instant. Therefore, futures trading should be cautious

3. Option trading
the nature of option trading is the same as that of spot trading, i.e. expected call to buy up, expected put to buy down
since the nature of options and spot is the same, what is the difference between them? Simple comparison:
for example, bitoffer, the first bitcoin option in the world, has no margin, no handling charge and no exercise

(the only option in the world that doesn't need to exercise)

1. For spot, it costs US $7500 to buy a bitcoin
2. For option, it costs US $5 to buy a bitcoin option

when bitcoin rises from 7500 to US $8000, the spot earns us $500 and the option earns us $500
the benefits of the two are the same, but the cost difference is 1500 times
this is the case with options, which is the same as the spot calculation of profit space, except that you don't need to pay the full amount, just need to pay a little deposit Different from the traditional European options)

4. ETF fund trading
ETF is usually called trading open-end index fund, which is a very popular financial derivative in the traditional financial market. Bitoffer's launch of bitcoin ETF fund increases the fixed leverage on the original basis, because there are a certain number of futures contract positions behind the proct
What's the difference between bitcoin ETF and spot< In this year's bitcoin proction rection, in theory, X2
2. mining machinery needs to be upgraded, in theory, X2
3. The current price of bitcoin is 7500x4 = US $30000 (expected price after next year's proction rection)

ring this period, the return comparison between holding spot money and ETF fund is as follows:
1, Up to 15 times (compound interest calculation)
there is no doubt that bitcoin ETF is the best investment choice!

6. The IEX coin issued by the iexotc exchange is good. There will be a fixed dividend income if you buy it

7. Brief introction: Sai blockchain (Beijing) Technology Co., Ltd. (Sai blockchain for short) is a high-tech company focusing on enterprise blockchain procts and services. Its business covers instrial blockchain solutions, blockchain cloud services, data blockchain services, etc., and is committed to providing blockchain procts and services for government, financial and other instrial customers, At the same time, it provides services such as notarization, right confirmation, chain transaction and analysis, data security protection of important data assets. Sai blockchain company is the initiator of big data blockchain laboratory and China blockchain application Alliance (Preparatory), and is contributing to the application and popularization of blockchain technology
legal representative: Zhao Gang
time of establishment: June 13, 2016
registered capital: RMB 1 million
Instrial and commercial registration number: 110108021410023
enterprise type: limited liability company (invested or controlled by natural person)
Company address: 01-84, 8th floor, 18 Zhongguancun Street, Haidian District, Beijing

8. There are mainly two kinds of bitcoin algorithms, which are elliptic curve digital signature algorithm and sha256 hash algorithm

elliptic curve digital signature algorithm is mainly used in the generation process of bitcoin public key and private key, which is the cornerstone of bitcoin system. SHA-256 hash algorithm is mainly used in the workload proof mechanism of bitcoin

the principle of bitcoin generation is the special solution generated by complex operation, and mining is the process of finding the special solution. However, the total number of bitcoin is only 21 million, and with the continuous mining of bitcoin, the more difficult it will be to proce bitcoin, and the cost of acquiring bitcoin may be higher than the price of bitcoin itself

the bitcoin block consists of a block header and the transaction list contained in the block. The size of the block header is 80 bytes, which is composed of 4-byte version number, 32 byte hash value of the previous block, 32 byte Merkle root hash, 4-byte timestamp (current time), 4-byte current difficulty value and 4-byte random number. A block header with a fixed length of 80 bytes is the input string used to prove the workload of bitcoin. Constantly change the random number in the block header, that is, the value of nonce, and do double sha256 operation on the block header after each change, and compare the result value with the target value of the current network. If it is less than the target value, the problem is solved successfully, and the workload is proved to be complete

the essence of bitcoin is actually the unique solution of a set of equations generated by a bunch of complex algorithms. Bitcoin is the first distributed virtual currency in the world, which has no specific distribution center. The network of bitcoin is composed of all users, because there is no center to ensure the security of data.

9. Bitcoin system uses asymmetric encryption to improve transaction security. This is what people from Yingfu College of Finance and economics told me. There was a friend there at that time

in the process of information encryption and decryption, different keys are used. Only the corresponding public key can be used for decryption. Owning the private key is equal to owning the ownership of bitcoin

similarly, bitcoin users also need to pass authentication to ensure the ownership of their own cryptocurrency assets.