Blockchain computing

1. What is hash algorithm? How to ensure the fairness of mining
hash algorithm is a cryptographic algorithm that can only encrypt, but not decrypt. It can convert any length of information into a fixed length string
this string has two characteristics:
1. Even if the input value changes only a little, the output hash value will be very different
2. Only exactly the same input value can get exactly the same output value
3. There is no rule between the input value and the output value, so the input value cannot be calculated by the output value. In order to find the specified output value, we can only use enumeration method: constantly change the input value to find the output value that meets the conditions
hash algorithm ensures that the results of bitcoin mining can not be deced reversely. Therefore, the miner's continuous operation is essentially brutally cracking the correct input value. Whoever finds the first one will get the bitcoin reward.

2. Sum software explanation: blockchain is encrypted by hash algorithm. Hash algorithm is a single password mechanism in blockchain to ensure that the transaction information will not be tampered. After receiving a piece of plaintext, hash algorithm transforms it into a short and fixed hash data in an irreversible way.

3. In fact, human beings are a complex biological science research carried out by aliens secretly. The development results seem to develop naturally. In fact, every step is the result of data regulation by aliens, and the whole process has been secretly transmitted back to the alien base. Refinement to each person's growth and development may correspond to a program variable in the operation process, or a non unique answer to a problem. For example: Americans and Asians, in fact, correspond to the X and Y in the alien project research. Taking different values will get different effects.

4. At present, the exchange rate between vnd and RMB is about 2600:1. You can exchange the money for 7 yuan and 23 cents. The price of a bowl of beef powder is not enough in some places..

5. Bitcontinent itself is a hardware manufacturer, selling mining machine is his main business, profiteering
then he built a mine pool, and many people bought mining machines in his custody

he can continuously earn money from the mine pool

6.

there are about three kinds of currency in currency speculation. one is the base currency, which is similar to the representative of money. CNY and usdt Basic goods with value). One is the mainstream token, BTC, ETH (because of the national restrictions, the exchange can only trade in token, that is, take one kind of virtual currency to buy another kind of virtual currency, I don't know why.) The other is a variety of virtual currencies (commodities)

the purchase process is to first go to the exchange platform to find a personal seller with RMB to exchange for usdt, In the process of using usdt to exchange for the mainstream token BTC or eth used in purchasing various virtual coins, and finally using eth to purchase various virtual coins

A. base currency: CNY, usdt (exchangeable, need to be exchanged in good faith transactions with indivial buyers) B. mainstream token: BTC, ethc, virtual currency: all kinds of money, such as profit, need to be exchanged into usdt again, and then sold into CNY. Learn more about the coin circle

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sharing area network ~ learn more about the coin circle

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experience: 1. Buy mainstream currency if you can't buy it. 2. If the new currency is not fried in January, it may become a banker to harvest leeks. 3. Just learned an experience, chasing up and killing down, meaning up do not buy, buy must be cut leeks If you have strength and value, you can hold it and wait for salted fish to turn over. 5. If the company is strong, the team is strong, and the executives are strong, you can pay more attention to it. Note: I don't understand the K line at all, and I don't understand the professional words, so I can only make a tentative decision on these purchase principles based on logical thinking

7. Probability problem, but I suggest you don't pay first, see clearly. In addition, more observation of that friend's life and your relationship, true or false in such a little information is impossible to judge