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Hackers invade virtual currency exchange

Publish: 2021-05-25 11:22:06
1.

at present, the vast majority of digital currency transactions are concted in exchanges. Among the numerous exchanges, bitfinex, binance, okex and so on are well-known

However, bitcoin and other digital currencies, as decentralized assets, have to be traded in a centralized exchange, which seems to have hidden contradictions and dangers

1. Problems and challenges of stock exchanges=“ //www.yuanxue365.com/en/img_fd039245d688d43fdf16c83b761ed21b0ff43bbf ">

in February 2014, Mt. GOx, the world's largest bitcoin exchange at that time, was stolen 850000 bitcoins, and the price of bitcoin suffered a" cliff "crash on that day. Later, it was revealed that Mt. GOx was in fact a thief, and only 7000 bitcoins were actually stolen

in August 2016, bitfinex, the largest U.S. dollar bitcoin trading platform, suffered a security vulnerability, resulting in the theft of 120000 bitcoins, which was worth $65 million at that time. If converted into the price in December 2017, it would be worth nearly $2 billion

on December 19, 2017, South Korea's youbit exchange was attacked by hackers and lost 4000 bitcoins, and the exchange declared bankruptcy

on December 21, 2017, the Ukrainian liqui exchange was stolen 60000 bitcoins, and the unit price of bitcoin plummeted by US $2000

in 2018, such a drama will only continue

in addition to the threat of hackers, traditional exchanges also have some inherent shortcomings, such as lack of supervision and inefficiency. The security of the exchange for investors can only rely on its own credit, and the cost of running is very low. The stock exchange is regulated at the national level, but there is no such sword of Damocles on the top of the digital currency exchange. Moreover, in an exchange, the same order can only be submitted to one exchange. After the user places an order, the funds used for the transaction will be frozen and can only wait for the completion or cancellation of the transaction. These are undoubtedly inefficient

All in all, the problems of exchanges are the problems of centralization

2. Decentralization of exchanges=“ //www.yuanxue365.com/en/img_86d6277f9e2f070889a173c9e224b899a801f257 ">

(1) the progress of the exchange itself

the upgrade of security means is various. At present, the best use is cold wallet, that is, to keep the digital currency in the offline U disk. At the end of 2017, when the YouTube exchange was attacked, 75% of its assets were withdrawn into the cold purse in time to avoid greater losses. However, it seems to be a helpless way to protect the online assets by offline means. Of course, there should be many other methods, which will not be repeated here

(2) the representative of cross ledger transaction is ripple network, and the operating company is ripple labs, which is a semi centralized system. Ripple is a decentralized clearing agreement. In order to solve the high cost and delay of inter-bank clearing, its base currency is XRP. Ripple network can connect all kinds of assets, such as US dollar, RMB, Japanese yen, bitcoin, etc. to its own network. In this system, U.S. dollars or bitcoin can be converted into reborn currency, and then reborn currency can circulate freely in the network, just as a highway is built between various assets. Due to the support of major banking institutions, the reborn currency achieved nearly 300 times growth in 2017

(3) decentralized exchange

some teams try to use blockchain technology to build a decentralized exchange. This kind of decentralized exchange, to some extent, is an extension of cross ledger trading

bitshares is the most representative of early rising projects. It builds a blockchain development platform with servers scattered all over the world. Even if some of them are attacked, the system will not collapse. Anyone can transfer money and borrow money freely on this platform, and can also quickly build a centralized exchange based on this platform. In order to ensure stable value, bitstocks also require three times of digital assets as collateral. At present, bitstocks are running fairly well

later, with the development of Ethereum and smart contract, the x x protocol came into being. This is an open protocol running in the Ethereum blockchain and a decentralized exchange in the Ethereum ecosystem. The agreement has attracted many investors. At present, it has completed financing and started to build open source software tools and infrastructure. Of course, there are many competitors. Ether Delta, IDEX and oasis DEX are trying to provide similar functions. Moreover, it is a smart contract system based on Ethereum, which only supports erc20 token. If other smart contract public chains start to rise, the demand will be reced

in addition, there are some teams that are entering, such as the domestic road seal agreement, looping (LRC) in English. They adopted a design similar to the X protocol, and also introced a fast payment function similar to the lightning network. It is characterized by trying to match multiple exchanges, the user's order can be broadcast to multiple exchanges, and completed by different exchanges. Moreover, the user can still use the account funds after placing an order, and the user's behavior of transferring part or all of the funds is equivalent to partial or total cancellation. To some extent, it improves the breadth and timeliness of the transaction. However, this system seems to have damaged the "power" of the existing exchanges. Whether we can persuade everyone to play together will be a difficult problem

At present, there is still a long way to go for the construction of decentralized exchange. In 3-5 years, traditional exchange will still be the main battlefield of digital currency

However, in the future, it is worth looking forward to let the decentralized digital currency get rid of the shackles of centralization

2. 100m bandwidth has little to do with the connected computer
because the connected computers are controlled by the policy settings of the router
the most important thing is to allocate your bandwidth reasonably. In theory, if you download resources from a computer in your network segment, if your router does not allocate bandwidth, it may cause the computers in the whole network segment to get stuck on the Internet
if the distribution is reasonable and the router is powerful, then 200 computers can be easily handled.
3. Freundlich adsorption equation can be applied to both monolayer adsorption and heterogeneous surface adsorption. Freundlich adsorption equation, as an empirical adsorption isotherm of heterogeneous surface, can well describe the adsorption mechanism of heterogeneous surface, and is more suitable for low concentration adsorption. It can well explain the experimental results in a wider concentration range. However, the disadvantage of Freundlich adsorption equation is that it can not get a maximum adsorption capacity and estimate the adsorption beyond the concentration range of parameters
4. It happens every year, so it's safe to find a reliable platform. Okex and 58coin are good. I can provide the download address
5.

According to a foreign media report on December 13, Beijing time, the world's largest bitcoin trading market, headquartered in Hong Kong,

"these bitcoin trading markets cross national boundaries, and there may be major transactions on systems and platforms outside the United States." "Without your knowledge, your investment funds may soon flow overseas," sec chairman Clayton said on Monday. As a result, this risk may be magnified, including that market regulators, such as the SEC, may not be able to effectively track down these bad actors or recover funds. "

this warning has at least been reflected to a certain extent in the bitcoin futures market. On Tuesday, the trading volume of bitcoin futures contract on CBOE futures exchange fell sharply, which is the second day of listing of the futures

6.

in fact, the generation of virtual currency also needs professional development team to develop, and cannot be developed and generated by itself. The development technology of virtual currency is mature, and there is no technical difficulty, but the positioning of virtual currency is the biggest problem, and the generation of virtual currency needs a lot of hardware equipment to mine

it is not a general equivalent, but an expression of value relevance, or a symbol, or a kind of personalized currency. On the other hand, it can also be called information currency. What they have in common is that they are all symbols of uncertain value and relative value. In this case, the traditional meaning of money has been broken. Money in the original sense is only a special case of a new and broader currency. Money can be regarded not only as a general equivalent, but also as a group of symbols of relative value

7.

he is probably caught up in the hacker Gang, because according to police investigation, it is a crime that makes use of hacker's technology to get information from victim's computer. The suspect used the hacker's method and technology to steal the victim's virtual currency's account, and also used a fake document to reorganize his mobile phone, and finally cracked his transaction password. So the man was targeted by the hacker gang

at ordinary times, we should also pay attention to our own account problems and mobile phone security, because some criminals always use some means to crack other people's account information, because once it is cracked by others, it will cause great economic losses, so we must pay special attention to this, For example, the man who is targeted by the hacker Gang is likely to show off his huge assets everywhere, because if he doesn't show off, then the hacker Gang doesn't know that he has so much money and won't target it, so the homework should be low-key and don't show off his wealth everywhere, otherwise he won't know if he is targeted

8. European countries - British etiquette
the British dress pattern is highly praised by many people in the world. Although British people are fastidious about clothes, they are very thrifty. A suit of clothes usually takes ten to eight years. An English man usually has two sets of dark clothes and two or three pairs of grey trousers. British clothing has been diversified and comfortable. Casual jacket and jeans are more popular

manners
in Britain, people extend their right index finger and middle finger in speeches or other occasions, with the palm of the hand outward, forming a V-shaped gesture to express victory; In Britain, if someone sneezes, others will say that they will bless you to show good luck

meeting etiquette
in Britain, when a baby is born, parents, relatives and friends usually name the baby according to the characteristics of the baby and the father's occupation. Some mothers have prominent families, so they use their mother's family name as the second name of the baby. In Britain, children are only called uncles to their parents' brothers and sisters. British old people pay attention to independence. They don't like others to call themselves old. They don't have to help them when they walk<

dining etiquette

hospitality and table manners
if you are invited to someone else's home, you should consider the following situations. For example, when should I get to the host's house? If it's not about business, it's just a social gathering. It's impolite to arrive early. The hostess is making preparations, and it will be very embarrassing for her to arrive before she is completely ready. It's best to be 10 minutes late. It's too late to be half an hour late. I need to apologize to the host. When should I leave? There are no rules, but it's impolite to sit too late at the host's house. If you're just invited to dinner and chat, you'd better leave between 10 and 11 or say goodbye an hour after dinner. If you are invited to stay for a few days or a weekend, you should buy a bunch of flowers for the hostess before you leave, which will make her very happy. In addition, the next day after you leave, you should send a note of thanks to the host with a small gift, such as a box of chocolates or some flowers

there are many kinds of banquets in Britain, mainly tea parties and banquets, including formal and informal tea parties. British people don't serve dishes or encourage wine ring the dinner. They just depend on the interest of the guests. Generally speaking, it's polite to eat all the dishes. When the waiter pours wine, the person who doesn't drink will put his hand to the mouth of the cup. Guests can shake hands or nod their heads when they say goodbye

British people generally prefer the following cooking methods: stewing, barbecue, frying and frying. They have unique ways of cooking meat, seafood and game; However, they have a special preference for beef, such as roasted beef, which is not only accompanied by seasonal vegetables and roasted potato, but also a little mustard sauce on the steak; In the use of seasoning, they prefer cream and wine; On the other hand, they like meat, cinnamon and other fresh spices

the well-known British dishes are steak kidney pie, English fish chip and chicken a la king. British people like hunting. During the hunting period, which is only once a year, many restaurants or restaurants will offer game meals, such as the cooking of venison, hare, pheasant, wild goat, etc. Generally, juniper nuts, berries and wine are used to remove the fishy smell of the food

British people are very particular about breakfast! British restaurants offer a wide range of dishes, including juice, fruit, eggs, meat, porridge, bread, jam and coffee. Nowadays, the popular high tea is also spread from the UK. Its more famous is Victoria style, which includes all kinds of snacks, muffins, tarts and sandwiches. Dinner is also the most important part of British people's daily life. They usually choose a late meal time and chat while eating to promote the friendship between diners. It can be imagined that they belong to a nation with great autonomy, and a dinner may take them several hours

Scotch whisky or gin are all well-known wines, and they all come from it. In Britain, there are many people who like to drink, mainly because it is also a wine procing country. The British spend more on alcohol than on other things

funeral etiquette
the marriage customs of the English people are rich and varied, and they all follow their own traditional ways from proposing to honeymoon. In York City in northern England, the way of marriage proposal is quite strange. It inherits the ancient folk custom. When a girl is mature and needs to get married, she puts on tight clothes of different colors and signals to the man. Different colors mean different things, just like traffic lights. Green means: & quot; Come on! I'm willing to fall in love and pursue it boldly& quot; Yellow means: & quot; There are opportunities. If it suits me, there is still a chance of success& quot; Red indicates: & quot; At present, I don't want to fall in love, don't pursue me& quot; The brave young man will pursue boldly according to the other party's clothing color and his own choice, and will never be labeled as misbehaving

once the relationship is established, the man will give the woman an engagement ring and hold a ceremony. This custom is found all over England. Wedding or engagement ring is a traditional custom of many nationalities. When the English hold a wedding ceremony in the church, it is indispensable for the bridegroom to wear a ring for the bride. People even think that marriage without a ring is invalid. When the priest asks a couple if they are willing to be each other's wife or husband, whether they can respect each other and grow old together, the groom puts a ring on the bride's ring finger. It symbolizes the husband's pure love for his wife. At the same time, the wife also expresses that she accepts and is faithful to this kind of love

the custom of wearing rings can be traced back to ancient Egypt and China. It is not only a keepsake but also an ornament. At first, the wedding ring is not inlaid with diamond, emerald, ruby and sapphire. The pure circle symbolizes the reunion of two people who are married together. In some ethnic groups, it symbolizes a kind of magic power to bless the couple's happiness and longevity. At the same time, the giver expresses his trust in the receiver, and the receiver expresses his loyalty to the giver

the gold ring symbolizes the innocence of love, and the silver ring means tenderness of emotion. Like western countries, engagement rings are made of gold and not inlaid with any gems. Wedding rings should be decorated with ornaments. As for the quality of the rings, it depends on the indivial's economic conditions. The engagement ring and the wedding ring can be worn on the same ring finger, or the engagement ring can be replaced by the wedding ring

in England in the 16th century, the inside of the wedding ring was often engraved with family patterns or proverbs, such as & quot; God made me so and so's wife; The ring of a bishop's wife is engraved with a hand, a heart, a bishop's crown and a skeleton, and the inscription is: & quot; I give you the first three, and the fourth makes me detached& quot; Most of the inscriptions on today's rings are only engraved with the initials of the bridegroom's and bride's names

British people need to wear formal dress when they get married; The bride wears a white shirt, a white skirt, a white wreath, a long white veil and a white bouquet. In short, the British advocate white, which symbolizes the purity and good luck of love. The custom of wearing headdress can be traced back to the 10th century B.C., when women wearing headdress was popular in the two river valley. In ancient Greece, when a wedding ceremony was held, not only the bride wore a linen or wool veil, but also a couple wore a corolla. In Roman times, people of different religious beliefs had to wear different colored headdresses to show their differences. After the middle ages, the crown decorated with pearls appeared among the nobles. Later, it developed into a white veil, and the size of the veil was extended day by day, and spread all over Europe

ring the wedding ceremony, the bride, wearing a white dress, holds her father's arm and is accompanied by the female guests. She enters the church in the wedding march. Accompanied by the male guests, the bridegroom in full dress stands at the altar waiting for the bride. When someone dies in an English family, a small notice is often published in the newspaper. After seeing the notice, relatives and friends go to the funeral to show their respect for the dead and greetings to their families

once the wedding ceremony is held, when the bride and groom come out of the church, people should congratulate the new couple. This kind of congratulations is not kissing, hugging and shaking hands, but scattering colorful scraps of paper on them. The custom of scattering paper scraps originated from scattering wheat grains. In 1491, King Henry VII of England traveled to Bristol with his queen. During the journey, she was seen by a baker's wife, so she sprinkled wheat grains on them from the window and cried out: & quot; Welcome, your majesty! I wish you happiness and longevity& quot; By the 16th century, this custom had been widely spread. People sprinkled wheat grains on the bridegroom and bride, and sometimes dyed various colors. The grain of wheat symbolizes a good harvest and a rich life. At the same time, it also congratulates the newlyweds on their happiness and longevity, and the family is full of children and grandchildren

honeymoon is also an important part of youth marriage in Britain. They spend the money they have saved on traveling, and traveling after marriage is called honeymoon. This was originally an ancient custom. When you get married, you must drink a special drink made with honey to symbolize family happiness, sweet love and happy life. This kind of drink takes 30 days from the beginning of marriage, so the first month of marriage is called honeymoon

in Britain, wedding anniversary is very important, which is celebrated every year and has different titles. The first year is paper marriage, the second year is cotton marriage, the third year is leather marriage, the fourth year is Yi marriage, the fifth year is wood marriage, the sixth year is iron marriage, the seventh year is bronze marriage, the eighth year is pottery marriage, the ninth year is willow marriage, the tenth year is tin marriage, and then there are steel marriage, Raoren marriage, lace marriage, ivory marriage and crystal marriage. Since the 15th year, there has been a title every five years, which is enamel marriage, silver marriage (the 25th year is a big ceremony), pearl marriage, coral marriage, ruby marriage, sapphire marriage, gold marriage (the second big ceremony in the 50th year), jade marriage and diamond marriage. This last one is the third big celebration, but few people can celebrate it

business etiquette
when you go to the UK for business activities, you should avoid July and August. During this period, people in the instrial and commercial circles take more holidays. In addition, it is not suitable to carry out business activities at Christmas and Easter. In Britain, no heavy gifts are allowed to avoid the suspicion of bribery. During the business meeting, you should come at the appointed time in advance. You are not allowed to arrive early or late. British business people are serious, not easy to move feelings and express their views. They regard boasting and boasting as a sign of lack of ecation

Travel etiquette
when you travel to the UK, you should pay attention to that all local vehicles drive along the left side of the road. British people abide by discipline, even if a few people get on the bus, they will consciously line up to get on the bus. In Britain, when taking a taxi, you usually tip about 10%. Hotels that include tips in the service charge bill don't have to pay extra tips. At the master's house
9.

We should be familiar with virtual currency. Remember that the first virtual currency that came into our view should be & lt; QQ currency & quot;. At that time, through & lt; Q coin & quot; Buy a lot of game props, virtual clothing, or recharge some members and so on; Q coin & quot;. Then, with the continuous development of the network, e-commerce is becoming more and more popular. Many enterprises will trade goods on the network, and then trade directly on the network. At this time, the currency is used as the initial & lt; General equivalent;, In order to meet the virtual demand on the network, it is no longer necessary to appear in the form of real money, so virtual money emerges as the times require and becomes the main means of circulation of Finance and other businesses on the network{ RRRRR}

10.

DWG beat team G2 3-1. I think the reason why team G2 lost was that they didn't play very well, and this year they underestimated the enemy. After all, compared with last year, this year's DWG has made great progress in terms of stability and overall team strength, They didn't show all their strength at all, and the DRX team against their own division was even more like playing in a training match, so without sufficient preparation, and the players didn't play very well on the field, the G2 team also swallowed the bad result of failure{ RRRRR}

but from the third and fourth innings, we can see that in the face of G2, DWG is completely in the form of rolling, especially after caps got Silas, it did not play the role that Silas should play, but was blown up online by showmaker with one hand cards , The performance of DWG's field play in the game is also very eye-catching. Every time at a critical moment, there will always be his figure, and his ability to seize opportunities is also very strong. Therefore, on the whole, the strength of DWG this year is fully qualified to win the League of heroes global finals champion. The reason why G2 lost is not only because of their poor state, but also because of their arrogant self-esteem

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