区块链转账小故事分享,区块链转账小故事视频

最近，一段有关区块链转账小故事的视频火了，它讲述了一个基于区块链技术的转账故事，引起了众多网友的关注。

这个故事发生在一个小镇上，一位叫小明的小伙子，想要给外地的家人汇款，但是他却发现传统的银行汇款方式费用太高，而且还要花很长时间才能收到款项。

小明发现了区块链技术，他发现区块链技术可以为他解决这个问题，他只需要将款项发送到对方的区块链账户，就可以实现转账，而且费用也比传统的银行汇款方式低很多，而且只需要几分钟就可以收到款项。

这种新技术让小明很是激动，他立刻在网上注册了一个区块链账户，并将款项发送给了家人，果然只需要几分钟，家人就收到了款项，小明也很高兴，他赞叹道：“区块链技术真是太神奇了！”

今天，区块链技术已经被广泛应用于金融、物流、法律等行业，能够大大提高效率，确保数据安全，更容易实现跨境支付。区块链技术不仅可以实现跨境支付，还可以解决众多行业的安全、效率等问题，它拥有巨大的发展潜力，值得我们期待。

㈠ Several thrilling blockchain stories

After sending Emily to school yesterday, she hurried home. The sixth of every month is the day for our Class 10 scheduled investment. When I turned on the computer, I was shocked. The day before, Bitcoin was still trading sideways at around 7,300 US dollars. Why did it suddenly become 6,400 US dollars? I rubbed my eyes. That's right, the overnight drop was as high as 13%. Before, I subconsciously thought that it would break through the 7400 mark. I didn't expect that there is a principle in the bear market called "If it lasts for a long time, it will fall."

Of course, in the blockchain world, yesterday’s 13% drop is nothing new. We old leeks followed Li Xiaolai’s path to wealth and freedom and came to this “exciting” world. It has been more than a year, and although I haven’t seen the rainbow yet, I have experienced the wind and rain. During last year’s 94 policy, Bitcoin fell by 36% in a few days. At that time, I had money in Yunbi but I didn’t dare to buy it. Only now do I realize how stupid I was at that time. At that time, I really didn’t understand anything, not finance, blockchain, and investment. I only knew that Li Xiaolai was awesome, and the people who left comments under his column were awesome. I wanted to join them, and no one else. Stop me, whoever stops me, I will be in a hurry, this is the passionate All-in blockchain.

But precisely because of being too timid, there have been very few operations over the past year, and precisely because of the few operations, the losses have not been large. My own blockchain story is as plain as a glass of boiled water.

Yesterday, I watched a video program about blockchain stories in Tencent's "Talk to Strangers". In the program, three people were interviewed: Zeng Wen, a wage earner, and Colorful Shenyu, a big boss in the currency circle. and Liu Ke, a sophomore student.

Zeng Wen, a migrant worker with a junior high school education, first worked at Foxconn. He was so busy that he had to trot all the way to the toilet. He said that he was always bullied by others because he was too honest, and he did all kinds of hard work. Yes, but no money. Later, I met a girlfriend who treated him in every possible way just to lure him into a MLM organization. As a result, she lost all her parents’ hard-earned money of 60,000 yuan. She escaped from the MLM organization and was deceived into working in a rat barn. , the people behind use money to patch up the holes made by those in front, but naturally there will always be a day when the holes can’t be patched up. This has defrauded all the men, women, and children in the village. They owe a debt of 300,000 yuan, and they are so scared that they dare not go home during the New Year. Later, he thought that if he relied on part-time work, he would never be able to repay so much money in his life, so he was introduced to the blockchain by a friend again. In 2017, during the blockchain bull market, I earned 30,000 yuan a day at my peak. Within a few months, I suddenly became a millionaire, and the coins I bought increased tenfold or a hundredfold. Not only did he pay off all the money he owed before, but he also sent money to his parents, helped them buy rings, and bought the largest TV set in the village for his family. Of course I have reached a new "class". Taking the bus used to be too expensive, but now I take a taxi when I go out. I go to KTV to hire girls. I am romantic and happy. Happiness comes at a lightning speed. Who knew that at the beginning of 2018, Bitcoin would rise from a high of 20,000One U.S. dollar suddenly fell to the level before liberation, and the myth of wealth creation was so easily shattered. Now he's back to his old self, but confident about the future. The host asked, where does your confidence come from? He said that he was trained when doing MLM. To do MLM, you must have positive energy.

Colorful Shenyu, a big figure in the currency circle, went to the library one day when he was in his first year of study and saw the news about Bitcoin. Then I skipped school and spent all day studying Bitcoin in my dormitory. The more I studied it, the more I liked it. I thought it was a new technology that would subvert the world. From then on, All in the blockchain, they were the first group of geek players, digging and selling coins by themselves. When he was 23 years old, he suddenly found that there were 100 million assets in his bank account. He was stupid, what should he do? ? How to spend 100 million? Go check the posts on Zhihu and read them one by one. In the end, you have so much money that you don’t know how to spend it, so you just go trash the place. You throw a party wherever you go and trash the place. After you spend the money, you’ll be fucking awesome. If it doesn't work, I have plenty of money. You can decide how much compensation I will pay.

Bitcoin is both a devil and an angel, occupying their lives. At the beginning, the price of Bitcoin was extremely low, ranging from a few dollars to dozens of dollars. It rose to hundreds of dollars, and then dropped rapidly after a few thousand dollars. It dropped so much that even my own mother didn’t recognize her, and she couldn’t even recover the cost of mining. The mine can only be closed. After being lost and confused for a month, he came back again. This time he went to Sichuan, Xinjiang, and Tibet to mine in remote places with cheap electricity. In those places, traffic was almost paralyzed, and he often had to face sudden mudslides. .

Seven years is a lifetime. From 2011 to 2018, it is exactly a lifetime. In this life, the colorful fish has experienced many joys, angers, sorrows and joys that its peers cannot experience at all. It has experienced too many storms and waves in life. Now he is still a loyal fan of Bitcoin. He said that even if Bitcoin becomes zero one day, I will always collect some Bitcoins. It was Bitcoin that changed his life path. Otherwise, he would be an unknown program. ape.

The last story is the most tragic, and the director deliberately placed Liu Ke in the finale. Liu Ke, a sophomore, failed to speculate on Bitcoin and is now alone in a foreign country, struggling to survive by doing drug experiments for hospitals. The reporter asked him, do you know that conducting drug experiments in hospitals is a high-risk job? He said, of course he knows that the higher the price, the more dangerous it is, but if you were me, you would do the same.

Liu Ke is a handsome-looking boy. If he had not embarked on the road of blockchain, he would be playing basketball on the playground with a bunch of girls cheering for him. He wiped the sweat from his face and turned to give the girls a chic pose or a charming smile.

Although his parents are not rich people, they run a small business at home and give him 1,000 yuan a month for living expenses. If he could study and study peacefully, he should have been able to graduate smoothly. But whenIn 2017, the myth of blockchain wealth creation, the myth that he doubled his money in one night with 3,000 yuan, made him lose control, so he took out loans on various platforms and used the loan money to invest. At that time, currency speculation was Just like a cash machine, you can make money no matter how you speculate, and the word "risk" in his world disappears.

So he used 20 times the leverage to leverage greater wealth. He never imagined that the wealth would not be leveraged, and the nightmare was awakened. Creditors came one after another with all kinds of threats and inducements. He felt that he could no longer stay, so he thought of committing suicide. His parents had already persuaded him not to blindly speculate in coins, but he couldn't listen and hurt his parents' hearts again and again. Feeling very guilty and blaming himself, he did not commit suicide and had no choice but to flee to Cambodia. I don’t know when the days of running away like this will end.

After watching this video, I felt mentally uncomfortable for a long time. It can be said that there is no threshold for entering the blockchain world. Anyone can enter. You don’t need to understand finance or blockchain. You don’t need to know how to invest, even if you only have a few hundred yuan, you can enter. But now this industry is so unstandardized. Many people and many projects are here to cheat, prepare a white paper, and after a wave of increases, the banker makes money and runs away. The unlucky ones are the leeks bought later. So far, the blockchain is a zero-sum game. At this stage, no real hematopoietic function has been born. So the nature of the blockchain is similar to that of the rat warehouse. Those who get rich in the front are just making money from the leeks that enter later.

But investment is something we must face in this life. If we have never invested in this life, our understanding of human nature and society will never be complete. But investment only seems very simple. To invest well, you need to practice continuously.

㈡ A brief discussion of blockchain: How to use blockchain for transfer transactions

In life, we all have our own bank accounts, and transfers are made between bank accounts. Similarly, digital currency transfer is the process of transferring Bitcoins from one Bitcoin address to another Bitcoin address. Then if you want to transfer money to others, you need to enter your Bitcoin address, recipient address, transfer amount and handling fee amount on the Bitcoin trading platform, Bitcoin wallet or Bitcoin client. After the payment is confirmed, the transaction information will be broadcast throughout the Bitcoin network. Every 10 minutes, miners will package the unaccounted transactions in the Bitcoin network into a block. This completes a confirmation. At this time, Bitcoin It has been transferred to the recipient's account. Generally, it needs to be confirmed 6 times to ensure that the transaction record cannot be tampered with by anyone before the transfer can be truly completed.

We talked about the transfer fee above, but how much is the fee for one transfer?

The Bitcoin transfer fee is a fee paid by traders to miners. It is used to encourage miners to compete for accounting and provide sufficient computing power for Bitcoin to ensure that BitcoinTo ensure the security of the currency network, sometimes we also call this fee the mining fee. When a user initiates a transfer on the Bitcoin network, a handling fee is unavoidable. Generally, it is 0.001-0.0015 Bitcoins. Due to the limited capacity of transaction records that can be accommodated in blocks, miners will give priority to packaging transaction records with high handling fees. , so a little more handling fee can be credited faster.

This article is compiled and published by Huixinyun. I will continue to update the "Brief Talk about Blockchain" series. This series will introduce some basic knowledge of blockchain and digital currency, so stay tuned!

(Huixin Cloud - IT collaborative industry ecological chain platform. The platform has product managers who study blockchain technology applications and mature product solutions for blockchain technology applications. Looking forward to visiting!)< /p>

ㅢ The tragic story of Bitcoin and pizza, missed 100 million!

This article is sponsored by the blockchain content platform "Bihai"

In 2008, Satoshi Nakamoto proposed the concept of Bitcoin and used blockchain technology to create a decentralized The payment system, a year later, produced the history of Bitcoin.

Speaking of the "love history" with Bitcoin, I believe most people can sum it up in this sentence: Back then, you ignored others, but now they make you unable to reach them (manual sadness Face) . Today I will tell you a story related to Bitcoin and pizza. It may be the saddest story in history. Netizens joked that this is probably the most expensive pizza in history.

On May 22, 2010, a little brother named Laszlo Hanyecz was just a small programmer in Florida. As a foodie in the mining industry, One day, he had a sudden idea and posted a message on the bitcointalk forum, asking if someone could help him order two pizzas in the store, and in return he could get 10,000 bitcoins. After the post was posted, most people were "watching", but a "kind-hearted" netizen from England actually ordered two pizzas for him. At that time, Bitcoin did not have any value. This was the first transaction in history to be paid with digital currency. This day was also designated as Bitcoin Pizza Day.

Some friends may have heard this story, but they always have their own opinions on the authenticity of the story. This Bitcoin pizza incident has been passed down by word of mouth in many versions. Is it still true? What is the truth?

The traceability on the Bitcoin blockchain helps us verify this transaction. Even a transaction eight years ago can accurately check the history today. There was indeed a transfer of 10,000 BTC on May 22, 2010, which matches the date of Pizza Day, so it seems certain. (Small details: The transfer fee at that time was as high as 0.99BTC)

Restore of the pizza incident

Back on May 18, 2010, our protagonist Laszlo Hanyecz posted on the Bitcoin forum BitcoinTalk and claimed: "I can pay 10,000 Bitcoins to buy a few pizzas, about two large ones are enough. so I can eat one and save one for tomorrow. You can make your own pizza or order takeout and have it delivered to my address." He even specified his taste preferences: "I like onions, peppers, Sausages, mushrooms, etc., no need for weird fish pizza.

After the post was posted, several interested forum friends did receive some replies. In addition to some people asking for the address, some people said they were in Europe didn't know how to help Laszlo Hanyecz order takeout from the United States. Laszlo attached his address in Florida, and someone suggested that 10,000 BTC could be exchanged for 41 US dollars at the current price. Two pizzas might not be worth it. (Some people thought it at the time. A perfectly normal reply. Looking back now, I feel quite emotional about missing out on hundreds of millions.)

A few days later, on May 22, Laszlo sent out a post showing off the successful transaction, saying A transaction has been completed with a buddy named Jercos, and a picture of the pizza is attached.

So, how does Laszlo have such a large amount of Bitcoins?

First of all, he is A programmer who is proficient in computers and entered this field very early, he started mining in the early days when the computing power of the Bitcoin system was not high.

Second, you may not As you know, he was the first person to use GPU mining. Most of his previous mining was done using CPU. He felt that CPU mining was not enough, and then he found that GPU was 800 times faster than CPU mining, so he started mining with GPU. When Bitcoin was not yet popular, GPUs were used to mine a large number of Bitcoins. According to his previous reply, the daily income was around a few thousand coins. It is not surprising why he gave 10,000 coins in exchange for pizza. Of course, nowadays GPUs The computing power is no longer enough, and most Bitcoin mining machines use customized ASIC chips.

Another question is, where are the people who bought the pizza now?

Jercos, who bought Laszlo’s 10,000-year Bitcoin, is of course another protagonist of this historical moment. He accepted an interview with a media the year before last and revealed his true identity.

It turns out that Jercos is very young, and is only 27 years old now (he was only 19 years old when he bought 10,000 Bitcoins). He told reporters that he paid attention to this technology when Bitcoin was first created, and became a major geek. A member of the forum. He didn’t know Laszlo, the pizza seller, but he alwaysWe were in and out of the same IRC (chat room), so we were relatively familiar with ID at the time.

When talking about the whereabouts of 10,000 Bitcoins, he said that in the second year, he sold these 10,000 Bitcoins for $400, a return of ten times. (Although it is ten times more, it is still a pity.) Today, he is still very optimistic about blockchain technology, and he is also very optimistic about Ethereum.

Be more rational, less gambler mentality

The new technological wave trend has arrived, whether it is artificial intelligence or blockchain, many people are constantly exploring, Buying and selling 10,000 Bitcoins is just an episode in their lives.

Blockchain and digital currency have been discussed at major conferences, and there are fewer and fewer voices of severe opposition. Most of them say that you can try it first, which is a good thing. This will give capital enough confidence to do it. Just like the early days of the Internet, in the final analysis, it still needs to be applied to the people to create real use value. For blockchain, this is an opportunity given to you and me by the times, and we must firmly grasp it.

The hot and cold market always makes people a little confused. What we have to do is to adjust our mentality, keep a close eye on our own direction, and don’t be too emotionally affected by the market. Know rationally and stick to your own rhythm. After all, this is a wealth challenge that competes with patience and confidence.

㈣ Blockchain Story - 9 - RSA Algorithm

RSA

Diffie and Herman perfectly solved the problem of key distribution. From then on, exchanging keys is very simple. Alice and Bob can exchange a key by shouting on the loudspeaker at the end of the village. But the encryption method is still symmetric encryption.

Although the DH protocol is convenient for exchanging keys, it still has some unsatisfactory troubles. Alice still has to yell with Bob for a long time before they can generate the key. When Alice wants to exchange keys, if Bob is sleeping, Alice's love letter still cannot be sent.

In their paper, Diffie and Herman pointed out the direction for future encryption methods. Designing asymmetric encryption through one-way functions is the ultimate solution. The so-called asymmetric encryption means that one key is used to close the lock and another key is used to open the lock. The two keys are different. A locked key cannot open the lock. The key to unlock the lock cannot close the lock.

Three scientists from MIT, they are Ron Rivest, Adi Shamir and Leonard Adleman , they read the paper by Diffie and Herman, were deeply interested, and began to study it. The algorithm that Diffie and Herman failed to figure out, since theyThe hands of three people were born.

In 2002, these three masters won the Turing Award for the invention of RSA. But don’t think that RSA is all they have. These three are real masters, and each of them has a fruitful academic career. Let us look up and explore the heights of the masters.

Leviste also invented the RC2, RC4, RC 5, RC 6 algorithms, as well as the famous MD2, MD3, MD4, and MD5 algorithms. He also wrote a book called "Introduction to Algorithms". Programmers have worn out countless brain cells on this book.

Shamir invented the Feige-Fiat-Shamir authentication protocol and also discovered differential cryptanalysis.

Aardman is even more legendary. He pioneered the DNA computing theory and used DNA computers to solve the "traveling salesman" problem. His student Cohen invented the computer virus, so he is considered the grandfather of computer viruses. He is also a master-level expert in AIDS immunology and has made outstanding contributions in every aspect such as mathematics, computer science, molecular biology, and AIDS research.

In 1976, all three were working at MIT's Computer Science Laboratory, and they formed a perfect team. Leviste and Summer are computer scientists who constantly come up with new ideas, and Aardman is an extremely skilled mathematician who can always find problems for Leviste and Summer.

A year later, in 1977, Leviste was lying on the sofa sobering up after a party. He tossed and turned, unable to fall asleep. Half asleep and half awake, before vomiting, a bolt of lightning suddenly struck his mind, and he found a way. Overnight, he wrote the paper. The next morning, he handed the paper to Aardman, and Aardman could no longer find any mistakes this time.

In terms of the name of the paper, these three people were really gentlemen and modest. Rivest named it Adleman-Rivest-Shamir, and the great Adleman asked that his name be removed, as it was Rivest's invention. The final result of the dispute was that Aardman's name was listed third, so the algorithm became RSA.

The RSA algorithm is based on a very simple fact of number theory: it is very easy to multiply two large prime numbers, but it is extremely difficult to factor the product, so the product can be made public and used as Encryption key.

For example, if you choose two prime numbers, one is 17159 and the other is 10247, then the product of the two numbers is 175828273. The product 175828273 is the encryption public key, and (17159, 10247) is the decryption private key.

The public key 175828273 is available to everyone, but to crack the ciphertext, you need to decompose 175828273 into 17159 and 10247, which is very difficult.

When RSA was announced in 1977, mathematician and popular science writer Martin Gardner published a public key in Scientific American magazine:

114 381 625 757 888 867 669 235 779 976 146 612 010 218 296 721 242 362 562 842 935 706 935 245 733 897 830 597 123 563 958 705 058 989 075 147 599 290 026 879 543 541

Martin offers readers a reward for This public key is used to crack. It took 17 long years, but on April 26, 1994, a group of 600 enthusiasts claimed to have found the private key. The private key is:

p: 3 490 529 510 847 650 949 147 849 619 903 898 133 417 764 638 493 387 843 990 820 577

q: 32 769 132 993 266 709 549 961 988 190 834 461 413 177 642 967 992 942 539 798 288 533

This 17-year cracking only targets 129-bit public keys. Today RSA already uses 2048-bit public keys. Public key, which requires almost all the computing power of computers around the world and takes billions of years to crack.

The security of RSA relies on large number decomposition, but whether its cracking difficulty is equivalent to large number decomposition has not been theoretically proven, because it has never been proven that cracking RSA requires large numbers. Number decomposition.

RSA still has weaknesses. Because it performs large number calculations, the fastest RSA is many times slower than ordinary symmetric encryption, whether implemented in software or hardware. Speed ​​has always been a drawback of RSA. Generally only used for small amounts of data encryption.

RSA also has a weakness, which is discussed belowwill also be mentioned in.

In cryptography, American scholars are very busy and have achieved results one after another. But Britain, the old empire, was not without its achievements in cryptography. After all, it was the hometown of Turing, the country where Turing led cryptographers to defeat the German Ingmar encryption machine at Bletchery Park.

The British also invented RSA, but it was buried.

In the 1960s, the British military was also troubled by the problem of code distribution. In 1969, cryptographer James Ellis was working for the military when he was approached about the problem of key distribution. He came up with an idea to use a one-way function to implement asymmetric encryption, but he couldn't find the function. Many talented people from GCHQ joined in to find the one-way function. But three years have passed, and these smart heads have not gained much. Everyone is a little frustrated. Does such a single function exist?

Often at this time, a newborn calf is needed to save the day. Cox is a brave calf. He is a young mathematician, very pure, the kind who is determined to devote himself to the Muse. Although he was young, he had a huge advantage. At that time, he knew nothing about the one-way function problem and had no idea that his teachers had achieved nothing in three years. So he rushed into the mine formation ignorantly.

Faced with such a dangerous mine array, Cox almost jumped over it. It only took half an hour to solve the problem. Then he went home from get off work. He didn't take it too seriously. It was just a job assigned by the leader. It was nothing more than serving tea, pouring water, sweeping the floor and solving math problems. Finish it early. You can also buy freshly baked bread on the way home. He had no idea he was making history. Cox was such a pure mathematician that he later felt a little embarrassed when he heard the praise from his colleagues. In his eyes, mathematics should be, as Hardy said, a useless knowledge, but he used mathematics to solve specific problems, which is shameful.

Unfortunately, Cox's invention was too early. The computing power of computers at that time was too weak and could not realize asymmetric encryption and decryption. Therefore, the military does not apply asymmetric encryption algorithms. James and Cox developed the theory of asymmetric encryption to perfection, but they could not tell it. The military required that all work must be kept secret, and they could not even apply for a patent.

Although the military has very strict confidentiality requirements on work results, it does not care much about the work results themselves. Later, the British Communications Headquarters discovered the American RSA algorithm and thought it was great. They simply forgot about the James-Cox RSA. While the communications headquarters was amazed, they dug through their knowledge base and discovered that their employee Cox had already invented an algorithm similar to RSA. Bureaucracy is really a good friend of mankind. It can always create all kinds of jokes for people, although its original intention is to create authoritarianism.

Cox didn't mind this. He even said: "Just bury it. I don't want to be an Internet celebrity. Why do I need fans? Can those fans eat it?" The original words are not This is true, but the meaning is basically the same.

Diffie made a special trip to the UK to meet James in 1982. The two cherished each other. It was really a time when heroes met. It's a pity that James still couldn't reveal their research on RSA. He only told Diffie: "You are doing better than us." Scientists from all over the world can compare who is better, but it is difficult for bureaucrats from all over the world. There was no distinction between them in terms of who was more arrogant.

The Story of Blockchain - 1

The Story of Blockchain - 2

The Story of Blockchain - 3
< br /> The Story of Blockchain - 4

The Story of Blockchain - 5

The Story of Blockchain - 6

Blockchain The Story of Chain - 7

The Story of Blockchain - 8

㈤ Introduction to Blockchain (1) - Let’s keep accounts together

When I was a child , I am very curious about many novel things and full of desire to understand and learn. At that time, countless exclamation marks often appeared in my brain. As I grow older and gain more experience, this kind of experience becomes less and less common, and I am not surprised by the new things that many people follow. When "blockchain" first appeared, I was completely attracted. After that, just like when I was a child, I was instinctively driven to learn and understand deeply, and found that "blockchain" is a new world that is about to come. s future.

The first time I heard the word "Blockchain" was in teacher Li Xiaolai's column "The Road to Financial Freedom", and I read it many times in the column after that. to the emergence of this term. Out of curiosity, I followed and read the articles on Lao Mao's public account "Cat Talk", and gradually gained a 0 to 1 understanding of the blockchain. block-block, chain-chain, blockchain-connect the blocks one by one into a chain, imagine the DNA extending infinitely in front of you...

This paragraph is about blocks on the network An explanation of the chain, to put it in simpler terms, the blockchain is an open, decentralized, trustless, and jointly maintained accounting system.

Let’s first look at the traditional centralized banking business model. When we do transactions, why do we need third-party centralized companies such as banks, Alibaba, and Tencent? Because there is no trust between people. A lends B 100 yuan today. If B does not recognize the loan tomorrow, what will A do? silverThe bank helps solve this problem. Everyone creates a real-name certified account in the bank. With the help of this centralized company, A lends 100 yuan to the bank (deposit), and B takes out 100 yuan from the bank (withdraw/borrow). Then the bank Responsible for recording this transaction, A's account will be 100 yuan more, while B's account will be 100 yuan less. This method of relying on third-party centralized companies for accounting can be seen everywhere in our lives: for online shopping, we need Alibaba's Taobao City and JD.com; for loans, we need to find reliable small loan companies; for new books, we need to go through a certain publishing house... …In the final analysis, it’s because people don’t trust each other, or the risks and costs of maintaining trust are too high, so we need such centralized and powerful third-party companies to endorse transactions and let them Taking these risks, of course, they also make us money. However, relying on third-party centralized business models has brought us inefficient services, cumbersome procedures and diversion of value, such as banks queuing up to handle business, the lending process of small loan companies, and Taobao and JD.com’s rent collection from merchants. , the publisher’s share of the author’s manuscript fee, etc. This is the centralized, third-party trust-based world we currently live in.

The blockchain world is a new world where no third party is needed, all transaction information is public, and everyone participates in bookkeeping! As the world's first proven and feasible blockchain application, Bitcoin subverts the traditional financial model by using automatic accounting and open accounting, information cannot be tampered with, and can be queried at any time, bypassing third-party centralization. Buyers and sellers conduct transactions directly. Such a transaction model must be efficient, low-cost, and open. Just imagine if blockchain technology becomes popular in the future, when you want to transfer a large amount of money to a friend abroad, you can skip the lengthy steps and get it instantly; if you write a book and publish it, you don’t have to worry about being pirated. There is no need for the publisher to earn your royalties; a peer-to-peer mutual insurance platform will be built directly between people, and the insurance company will become a consulting company, etc. (In fact, Bitcoin and Press.one are realizing such a subversion)

The Internet is currently booming. We have Didi taxis or shared bicycles for outside work, Ele.me for ordering food, and Ele.me for dining in restaurants. Dianping, convenient payment via WeChat and Alipay is everywhere. When we pay on the Internet, we need to rely on a third-party platform company trusted by both buyers and sellers to complete the transaction for us. These third-party companies have a large amount of transaction data and information on both parties to the transaction. If a hacker intrusion occurs and information is lost, we will bear the consequences for our "trust risk"; not to mention the delays caused by reviewing and clearing transaction data. The inconvenience, and the huge cost of managing such a huge amount of data.

So how is blockchain technology implemented? For example, if there is an army that wants to capture the enemy's fortress, and each soldier wears a special helmet, the helmet has a red button. Every time a fort is captured, the army headquarters will award a medal. First, there is a soldier A who takes the lead in occupying the first fortress 1. He announces to other comrades through his helmet that he has occupied fortress 1. At this time, the helmet will record the coordinate information of fortress 1 and pass it to other soldiers along with A's shouting. All soldiers and others heard A's shouting through the helmet and pressed the red button to indicate that the message had been recorded simultaneously. Then everyone knows that fortress 1 has been occupied by A, and A is rewarded with a medal. Then others will immediately capture other fortresses and broadcast their achievements in the same way. In this way, the information that different fortresses were captured by different soldiers in this battle is all stored in everyone's helmet. Here, the helmet is the public ledger (strictly speaking, the helmet's program), and everyone participates in accounting; each capture information constitutes a block, and all information arranged in a certain order forms a blockchain; In addition to keeping accounts (pressing the red button), participants also scramble to grab the right to package new data (capture the fortress).

So let’s take a look at the advantages of this joint accounting method. 1. Decentralization. The ledger is jointly recorded and maintained by everyone. It doesn’t matter who records it first, because if there is an incentive (medal), someone will do it, and there is no need for a third party to intervene (no need for the command of a general or combat department, reducing military expenses and commanders) risk of sacrifice). 2. Data cannot be tampered with. If you want to modify the accounted data, you must modify more than 51% of the node information to succeed. Just imagine, if this army has one million people (actually the number of blockchain nodes is much larger than this number), it would be an almost impossible task to modify the helmets of more than half of the army. 3. Information is open and transparent. Everyone can check this transaction information in their own ledger (all fortress capture information has been recorded in everyone's helmet).

This is the first article I started writing. The last time I wrote so many words was probably in the college entrance examination. The first article was about a new field that I had never touched before. The text was a bit confusing and mediocre, and I didn’t know whether the analogy I made was correct or not, but I finally started to do it. Writing is indeed a skill that everyone should have, and it is a skill that can be improved through deliberate practice and urge yourself to maintain it.

㈥Why did Jack Ma personally witness the birth of the world’s first blockchain cross-border remittance

The world’s first blockchain-based e-wallet cross-border remittance service was launched in Hong Kong on June 25 Online - Hong Kong version of Alipay AlipayHK users can remit money to the Philippine wallet Gcash through blockchain technology.

Ant Financial stated that AlipayHK has cooperated with Gcash to become the world's first e-wallet to use blockchain for the entire cross-border remittance chain, and Standard Chartered Bank will be responsible for the end of the day. Fund clearing and foreign exchange exchange. Gcash users can spend immediately after receiving the payment. Cross-border remittances can be as practical as domestic transfersTimely arrival, 24/7 non-stop, saving money and trouble, safe and transparent, it can be said to have redefined "cross-border remittance".

㈦ The prototype of blockchain - distributed accounting

A short story to help you understand the prototype of blockchain - distributed accounting:

A group of friendly residents lived on a group of small islands. Over the long years, they used shells as a credit intermediary and used them as equivalent exchange items to exchange for the food they needed. A thousand years later, the island appeared A big man asked everyone to agree to use the leaves from his tree as the only credit intermediary.

Anyone who tried to resist was thrown into the sea to feed the fish, and the kind people were quickly tamed.

Slowly, the leaves in Dahan’s house became equivalent exchange items on the island. Islanders must first exchange items for leaves, and then use leaves to exchange for other daily necessities. As the days passed, everyone had more and more leaves in their hands, but the things they bought were less and less. Except for the big man and his men, many people were living a tight life.

Until one day, one of the islanders drifted to another island and found that the exchange method on this island was different from that on his own island. They do not use leaves, but jointly keep accounts. All islanders keep their current accounts in a ledger, and all transactions are represented by numbers on the ledger. As long as it is approved by 6 people, everyone thinks the account is correct.

If this person wants to buy something, he only needs to debit it and take away the goods. This new method is simpler and more convenient than using leaves as intermediaries. If you choose this method, everyone on the island can trade freely without leaves. At the same time, because the accounts are public, everyone can check the bills, which eliminates the possibility of fraud.

This kind of joint accounting method has the shadow of Bitcoin and is also the prototype of blockchain technology-distributed accounting. The 6 people on the island are equivalent to 6 nodes. Each node maintains its own ledger, which records the transactions of the islanders on the island.