Can quantum computer mine
Publish: 2021-05-26 15:31:09
1. Theoretically, it can be cracked, but it's just a time-consuming problem. If you think about the cost of mining, you should know the difficulty of cracking. To protect bitcoin by means of encryption must make the cracker pay a much higher price than mining, otherwise everyone can get it by cracking rather than mining
2. < UL > in the current situation, quantum computers can't help with bitcoin mining. turning to quantum computers will not affect the mining speed, because with the soaring price, the difficulty of mining will increase. indeed, The introction of quantum algorithm will put the traditional cryptocurrency system at risk < / UL >
at present, we do not have such quantum algorithm, but what should we do if we find it in the future? As we all know, bitcoin aims to identify the speed of mining, and also increases the difficulty of mining. It means that the difficulty of finding the algorithm will become more complex
in fact, it is impossible to mine with ordinary computers, so miners use ASIC chips to dig bitcoin. At present, there are two kinds of cryptocurrency, RSA and elliptic curve cryptocurrency. In fact, these two cryptocurrency methods are vulnerable to quantum computer attacks. According to Anastasia, we only need 2500 cubits to interrupt algoant, interrupt EC, and about 4000 cubits to interrupt RSA
Hackers can identify bitcoin wallet addressesin the current situation, hard forking is impossible because many users have lost their wallet addresses and coins. Now, the worry is that quantum computers can easily help track lost wallets, and hackers can use them to decrypt and retrieve such lost coins
However, the main focus is the research of quantum computer. The entry of such computer system will make the cryptocurrency system face risks. The system could be the destroyer of bitcoin3. In fact, the threat of quantum computers to bitcoin is not mining, but trading attacks. We know that the transaction of bitcoin is completed by decentralized cryptography authentication, and the core of this authentication method is hash algorithm. If there is a quantum computer, it can create collisions (Grover algorithm, polynomial acceleration) to forge transactions for profit. Because the core algorithm of bitcoin has been fixed, if the algorithm is not changed, the key length cannot be increased, and this attack cannot be resisted. However, if there is a practical quantum computer, what can we do is better than this kind of attack...
please accept
please accept
4. CPU can also mine, just because of the working mode of CPU, the execution efficiency of mining operation is very poor, and the execution efficiency of graphics card is relatively high, so few people use CPU to mine
5. No, bitcoin is a relatively complete system and will not be cracked easily.
6. FOB is the CIF price, that is, all the expenses before the goods are loaded on the ship shall be borne by the seller
CIF is the arrival price including insurance, that is, the seller should not only bear the sea freight and land freight before arriving at the port of the consignee, but also bear the insurance premium
1. The composition of expenses is different, and the quotation is different. FOB price takes into account all the expenses and profits of the goods from the purchase and proction of raw materials until the goods are declared for export and loaded into the cabin designated by the buyer, while CIF price is based on FOB price plus Shanghai freight and
insurance< The port after FOB refers to the port or river port of the seller's country, while the port after CIF refers to the port or river port of the buyer's country. The destination port after CIF should indicate the country of the port, such as Victoria port, Hong Kong port, Britain port and Brazil port, which must be distinguished by country
3. The terms of price are different from the international conventions. FOB price is used in the United States and in the general rules of the International Chamber of Commerce in 1990 and 2000, and CIF is mostly used in the 1990 / 2000 practice of the International Chamber of Commerce. Attention should be paid to the differences in concluding trade contracts or issuing letters of credit by customers
4. Insurance premium payment and handling are different: FOB and CNF insurance shall be handled by the buyer, and the Seller shall inform the buyer before shipment; CIF insurance shall be handled and paid by the seller, and the Seller shall handle the insurance according to the contract terms and insurance terms and deliver the insurance policy to the buyer
5. The payment objects of THC terminal operation fee are different. According to the principle that who pays the sea freight will pay the THC fee, the THC fee in FOB price terms should be borne by the buyer, and the THC fee in CIF should be borne by the seller. The current domestic thc standard is 370 yuan for 20 "container and 560 yuan for 40" large container. The THC fee should be clearly stated in the trade contract< The time for notifying the buyer of the shipping notice is different: FOB price and CNF inform the buyer of the contents and details of the shipment before shipment, so that the buyer can have enough time to handle the marine insurance of the goods, while CIF is insured by the seller, which can inform the buyer of the shipping notice within a few days after shipment
7. The difference between chartering and booking: the FOB price is arranged by the shipping company / shipping agent or even freight agent appointed by the buyer. Whether the buyer can charter and book the shipping space in time will affect the seller's timely delivery and bank presentation
for CIF price, the Seller shall choose the shipping company or freight forwarder. Air cargo: the FOB seller shall only bear all the expenses before the goods are put on the plane, and the expenses at the destination port shall be borne by the buyer
in addition to the FOB air freight, the CIF seller shall also bear the air freight and insure the goods against air freight as required by the buyer
after the air cargo is delivered from the port of shipment, the ownership of the goods is transferred to the buyer
9. The tracking service after shipment is different: FOB price term is the shipping agent / freight agent appointed by the customer, and the buyer is generally responsible for the two-way and three way transshipment, while CIF price term, in order to provide better service to the seller, the seller should contact the shipping agent in time to inform the buyer of the transshipment situation, the agent information at the port of destination and when to arrive However, the seller has no such obligation in CIF price, and the buyer will have such requirement in general practice)
10. The risks of force majeure are different: the difficulty of claim is different
in the actual export business, if the goods have been loaded and suffered from natural disasters or accidents e to force majeure at the port of loading or in the course of transportation, However, the risks of FOB, CNF and CIF are different when the documents submitted by the seller are "inconsistent" with L / C and the payment is refused by the levying bank
in CIF terms, the Seller shall take out insurance at the port of departure. In case of dishonor, the seller can claim against the local insurance company
in the case of FOB and CNF, the buyer handles the insurance, the insurance policy is in the hands of the buyer, and most of the insurance companies are abroad, so it is difficult for the seller to claim from the insurance company, especially in FOB terms, it is more difficult for the seller to find the shipping company / agent designated by the buyer to obtain evidence timely and accurately.
CIF is the arrival price including insurance, that is, the seller should not only bear the sea freight and land freight before arriving at the port of the consignee, but also bear the insurance premium
1. The composition of expenses is different, and the quotation is different. FOB price takes into account all the expenses and profits of the goods from the purchase and proction of raw materials until the goods are declared for export and loaded into the cabin designated by the buyer, while CIF price is based on FOB price plus Shanghai freight and
insurance< The port after FOB refers to the port or river port of the seller's country, while the port after CIF refers to the port or river port of the buyer's country. The destination port after CIF should indicate the country of the port, such as Victoria port, Hong Kong port, Britain port and Brazil port, which must be distinguished by country
3. The terms of price are different from the international conventions. FOB price is used in the United States and in the general rules of the International Chamber of Commerce in 1990 and 2000, and CIF is mostly used in the 1990 / 2000 practice of the International Chamber of Commerce. Attention should be paid to the differences in concluding trade contracts or issuing letters of credit by customers
4. Insurance premium payment and handling are different: FOB and CNF insurance shall be handled by the buyer, and the Seller shall inform the buyer before shipment; CIF insurance shall be handled and paid by the seller, and the Seller shall handle the insurance according to the contract terms and insurance terms and deliver the insurance policy to the buyer
5. The payment objects of THC terminal operation fee are different. According to the principle that who pays the sea freight will pay the THC fee, the THC fee in FOB price terms should be borne by the buyer, and the THC fee in CIF should be borne by the seller. The current domestic thc standard is 370 yuan for 20 "container and 560 yuan for 40" large container. The THC fee should be clearly stated in the trade contract< The time for notifying the buyer of the shipping notice is different: FOB price and CNF inform the buyer of the contents and details of the shipment before shipment, so that the buyer can have enough time to handle the marine insurance of the goods, while CIF is insured by the seller, which can inform the buyer of the shipping notice within a few days after shipment
7. The difference between chartering and booking: the FOB price is arranged by the shipping company / shipping agent or even freight agent appointed by the buyer. Whether the buyer can charter and book the shipping space in time will affect the seller's timely delivery and bank presentation
for CIF price, the Seller shall choose the shipping company or freight forwarder. Air cargo: the FOB seller shall only bear all the expenses before the goods are put on the plane, and the expenses at the destination port shall be borne by the buyer
in addition to the FOB air freight, the CIF seller shall also bear the air freight and insure the goods against air freight as required by the buyer
after the air cargo is delivered from the port of shipment, the ownership of the goods is transferred to the buyer
9. The tracking service after shipment is different: FOB price term is the shipping agent / freight agent appointed by the customer, and the buyer is generally responsible for the two-way and three way transshipment, while CIF price term, in order to provide better service to the seller, the seller should contact the shipping agent in time to inform the buyer of the transshipment situation, the agent information at the port of destination and when to arrive However, the seller has no such obligation in CIF price, and the buyer will have such requirement in general practice)
10. The risks of force majeure are different: the difficulty of claim is different
in the actual export business, if the goods have been loaded and suffered from natural disasters or accidents e to force majeure at the port of loading or in the course of transportation, However, the risks of FOB, CNF and CIF are different when the documents submitted by the seller are "inconsistent" with L / C and the payment is refused by the levying bank
in CIF terms, the Seller shall take out insurance at the port of departure. In case of dishonor, the seller can claim against the local insurance company
in the case of FOB and CNF, the buyer handles the insurance, the insurance policy is in the hands of the buyer, and most of the insurance companies are abroad, so it is difficult for the seller to claim from the insurance company, especially in FOB terms, it is more difficult for the seller to find the shipping company / agent designated by the buyer to obtain evidence timely and accurately.
7. No signal input, the black screen is entering the power saving mode<
check whether the signal cable connector connects the computer end and the display end loosely
check whether the graphics card is loose
the problem is not big, at least the screen is not bad.
all the problems are caused by
signal cable connection problems, which may be external or internal
,
secondly, the graphics card may be oxidized or loose, so wipe the golden finger with an eraser, Re install it
that's even more the problem of power supply
if this can't be solved, it may be the poor internal contact of the monitor or the problem of the motherboard. Please give it to the professional maintenance personnel to repair it.
check whether the signal cable connector connects the computer end and the display end loosely
check whether the graphics card is loose
the problem is not big, at least the screen is not bad.
all the problems are caused by
signal cable connection problems, which may be external or internal
,
secondly, the graphics card may be oxidized or loose, so wipe the golden finger with an eraser, Re install it
that's even more the problem of power supply
if this can't be solved, it may be the poor internal contact of the monitor or the problem of the motherboard. Please give it to the professional maintenance personnel to repair it.
8. P2P network lending (100% principal guarantee) (maximum 20% annual conversion rate) (minimum 50 yuan starting)
that is, peer-to-peer lending, or peer-to-peer credit, refers to a new business operation mode in which social subjects use the network platform of intermediary agencies to lend their funds to those who are short of funds. It is the result of the development of private lending from "offline" to "online", and the embodiment of citizens' exercise of their property rights. With the development of network technology, the restriction of formal financing channels, the deconstruction of acquaintance society, the increasing inflation rate, the restriction of investment mode, and the continuous improvement of personal credit system, P2P network lending has been promoted< The characteristics of online loan investment are as follows:
1
in addition to the minimum investment of RMB 10000 required by lufax, the investment threshold of most online lending platforms is as low as RMB 50. Compared with the high threshold of trust and bank financial procts, online loan investment is a low threshold public financial proct, suitable for investors from all walks of life
2. The investment income is stable
as a loan proct with agreed interest rate, the return of online loan investment is relatively stable. Referring to the five-year lending interest rate level of China's online loan, on average, the overall yield level is about 20%. Of course, recently, with the emergence of new platforms with more marketing activities, the overall yield level has a rising trend. And the interest rate level of the mainstream online lending platform is steady and falling
3. The investment period can be planned freely
for online loan investment, you can choose the investment period according to your own needs and the actual situation in the future, and many platforms also allow investors to borrow money on the platform with unexpired investment as guarantee, so as to meet the unpredictable capital demand. This allows the liquidity of online loan investment to be released. Investors can not only refer to the future capital demand to choose the investment period, but also borrow money on the platform to withdraw cash quickly. To meet the needs of all kinds of funds
in real life
4. System risk is the main risk of online loan investment
as the network form of private lending, the credit risk is the main risk, that is, if the borrower does not pay back the money, then the investor may lose the principal. However, in China, many online loan platforms, as fund intermediaries, play the role of guarantors. If the borrower fails to repay on time, then the online loan platform will advance the principal or principal and interest, which allows investors to avoid the credit risk of the borrower's overe repayment, and all the risk lies in the reliability of the online loan platform itself, Whether the platform itself can bear the pressure of overe. As long as the platform is
there is no risk of investors losing their principal
under the background that inflation remains the same, the economic situation is complex, and there are few investment channels for investors to make money, the advantages of online loan investment appear
first of all, compared with the depressed Chinese stock market, the depressed open-end funds and various private equity procts, as well as the low-yield savings and banking procts that cannot be separated from CPI, the return rate of online loan investment is stable and remains at a high level
secondly, the liquidity of online loan investment can be enhanced through reasonable planning, and its liquidity is much stronger than trust procts with many similarities. In some platforms where net worth loans can be made, the withdrawal application is made in the morning, and the funds can reach the bank card of investors at noon or afternoon. The actual liquidity is stronger than that of monetary funds
thirdly, the lowest investment threshold enables everyone to enjoy the investment income, which most other investment tools, especially high threshold trust and bank financial procts, can not achieve
Fourth, compared with margin trading procts such as futures, the risk of online loan investment is moderate, and through diversification of investment, the risk is completely within the range of ordinary people
finally, the demand for investors is low. Online loan investment does not need too much investment technology and experience. When most of the platforms are breakeven, you only need to choose a safe investment platform to achieve stable income. And some platforms have automatic bidding function, which can automatically bid without online setting. It is suitable for investors who have no time to surf the Internet
[online lending platform is an emerging stage in China, which has just begun. Be careful not to be cheated! Without the protection of laws and regulations, it's difficult to protect the rights and interests of financial managers, so we should be careful, careful, careful, careful, careful, careful!]
-- customer service of Li Li loan will serve you wholeheartedly————
that is, peer-to-peer lending, or peer-to-peer credit, refers to a new business operation mode in which social subjects use the network platform of intermediary agencies to lend their funds to those who are short of funds. It is the result of the development of private lending from "offline" to "online", and the embodiment of citizens' exercise of their property rights. With the development of network technology, the restriction of formal financing channels, the deconstruction of acquaintance society, the increasing inflation rate, the restriction of investment mode, and the continuous improvement of personal credit system, P2P network lending has been promoted< The characteristics of online loan investment are as follows:
1
in addition to the minimum investment of RMB 10000 required by lufax, the investment threshold of most online lending platforms is as low as RMB 50. Compared with the high threshold of trust and bank financial procts, online loan investment is a low threshold public financial proct, suitable for investors from all walks of life
2. The investment income is stable
as a loan proct with agreed interest rate, the return of online loan investment is relatively stable. Referring to the five-year lending interest rate level of China's online loan, on average, the overall yield level is about 20%. Of course, recently, with the emergence of new platforms with more marketing activities, the overall yield level has a rising trend. And the interest rate level of the mainstream online lending platform is steady and falling
3. The investment period can be planned freely
for online loan investment, you can choose the investment period according to your own needs and the actual situation in the future, and many platforms also allow investors to borrow money on the platform with unexpired investment as guarantee, so as to meet the unpredictable capital demand. This allows the liquidity of online loan investment to be released. Investors can not only refer to the future capital demand to choose the investment period, but also borrow money on the platform to withdraw cash quickly. To meet the needs of all kinds of funds
in real life
4. System risk is the main risk of online loan investment
as the network form of private lending, the credit risk is the main risk, that is, if the borrower does not pay back the money, then the investor may lose the principal. However, in China, many online loan platforms, as fund intermediaries, play the role of guarantors. If the borrower fails to repay on time, then the online loan platform will advance the principal or principal and interest, which allows investors to avoid the credit risk of the borrower's overe repayment, and all the risk lies in the reliability of the online loan platform itself, Whether the platform itself can bear the pressure of overe. As long as the platform is
there is no risk of investors losing their principal
under the background that inflation remains the same, the economic situation is complex, and there are few investment channels for investors to make money, the advantages of online loan investment appear
first of all, compared with the depressed Chinese stock market, the depressed open-end funds and various private equity procts, as well as the low-yield savings and banking procts that cannot be separated from CPI, the return rate of online loan investment is stable and remains at a high level
secondly, the liquidity of online loan investment can be enhanced through reasonable planning, and its liquidity is much stronger than trust procts with many similarities. In some platforms where net worth loans can be made, the withdrawal application is made in the morning, and the funds can reach the bank card of investors at noon or afternoon. The actual liquidity is stronger than that of monetary funds
thirdly, the lowest investment threshold enables everyone to enjoy the investment income, which most other investment tools, especially high threshold trust and bank financial procts, can not achieve
Fourth, compared with margin trading procts such as futures, the risk of online loan investment is moderate, and through diversification of investment, the risk is completely within the range of ordinary people
finally, the demand for investors is low. Online loan investment does not need too much investment technology and experience. When most of the platforms are breakeven, you only need to choose a safe investment platform to achieve stable income. And some platforms have automatic bidding function, which can automatically bid without online setting. It is suitable for investors who have no time to surf the Internet
[online lending platform is an emerging stage in China, which has just begun. Be careful not to be cheated! Without the protection of laws and regulations, it's difficult to protect the rights and interests of financial managers, so we should be careful, careful, careful, careful, careful, careful!]
-- customer service of Li Li loan will serve you wholeheartedly————
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