I have heard a lot of big cows recently said: "The blockchain will be a revolutionary technology that will change the world in the next decade!" But what is the blockchain? And non-small series will try to answer you.
After all, I have blown countless times of cowhide in my life, this time it will be the most "professional" ever.
There have been many shocking terrorist attacks in the world, and today, with the rapid development of the Internet, such terrorist attacks seem to be even more sinister. On October 21 last year, the US Internet suffered a super-dangerous DDoS attack, and about half of Internet services were paralyzed, including major departments such as Twitter, PSN, SpoTIfy, Netflix, Airbnb, Github, Reddit, and The New York Times. The area cannot be logged in.
It is understood that hackers use a Mirai virus called "Internet of Things Destroyer" for broiler search. When scanning an IoT device (such as a webcam, smart switch, etc.), try to use the default password to log in. Once the login is successful, the IoT device enters the "broiler" list, and the hacker controls the device to attack other network devices. This time, letting the American people experience a nightmare-like massive disconnection is from this virus. According to ISP service provider Level3, there are 500,000 IoT devices infected by Mirai worldwide, including 29% in the US, 23% in Brazil, and 8% in Colombia.
Today in the IoT fire, this is simply a disaster.
In addition to this catastrophe catastrophe, I also feel that there is still a hidden danger in the real society, that is, suddenly my Alipay and the money in the bank are suddenly found to be invalid, although there are only a few steel shackles. The existence of this money is not what I said, but the bank or the kind of organization that helps you manage the money. When trading with money, it must also be confirmed by such an institution. If one day, Ma Yun’s ass is taken away, then you have only a tragedy. (Note: This is "if"!!)
As can be seen from the above examples, whether it is the Internet of Things home products or the payment problems, we have given the most important trust to a center.
If there is no such center, then this process will become like this?
Below we simulate a borrowing link.
A borrowed 100 pieces for B, and A shouted to everyone, 'I am, borrowed 100 pieces for B', and B then shouted 'I am B, A borrowed 100 pieces for me'. At this time, everyone who heard it pulled out a small notebook record 'A borrowed 100 pieces for B'.
There is no Ma Yun in this link, and Ma Huateng is an intermediary. Once B does not recognize A to lend him money, then everyone will take out the mysterious little book to refute B.
The first way to borrow money that is "unique" is that Nakamoto is in the name "Bitcoin: A Peer-to-Peer Electronic Cash System" (Bitcoin: A Peer-to-Peer Electronic Cash System) Presented in the paper. The first sentence of the abstract is to say this:
“This paper proposes an electronic cash system that is fully implemented through peer-to-peer technology, which enables online payments to be initiated directly by one party and paid to the other without the need to go through any financial institution.â€
Now another person is called Xiaoya. Xiaoya said, "I have 100 non-coins in my hand." (This way of creating money is really cool, come on.) And everyone has written down the small book, then Xiaoya really has 100 and non-coins.
What if the other said that he also has 100 and non-coins? The clever little Asian has not been set aside, and has added his own unique mark aaa to each non-coin, so when A borrows money, Xiaoya says, "I borrowed 10 and non-coin. A, this behavior is called aab", everyone remembers a small book. Then, when A borrows money again, A says, "A borrowed 5 and non-coins to B. This behavior is called aac, and the last behavior is aab." Then the model of borrowing money becomes a chain-like shape.
Xiaoya said: "I will call this account book a blockchain!"
In fact, at the beginning of the book "Proficient in Bitcoin", the blockchain is mentioned, indicating that the blockchain is a series of verified blocks, each of which is connected to the previous one and connected to the creation zone. Piece. We can also think of the blockchain as a public ledger (the small book) that records all transactions.
Of course, the small Asia here is Nakamoto Satoshi (Nakamoto Satoshi withdrew from public view in April 2011, leaving the burden of bitcoin code development and network construction to a thriving community member.), and non-coin is bitcoin, Each block header uses a SHA256 cryptographic hash to generate a hash value. The first block in the blockchain was created in 2009 and is known as the Creations block. It is the common ancestor of all the blocks in the blockchain, which means that you can trace back from any block, backwards, and eventually reach the creation block.
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