Chapter 126 Everyone Is Happy

Blockchain?

Although Zhang Fei is in charge of technology, he cannot cover everything. This is the first time he has heard of this term.

The blockchain in the original world originated from Bitcoin. The computing power coin in this world is not popular yet, so not many people know about it. It is not surprising that Zhang Fei does not know about it.

Blockchain is just a way of recording data with a timestamp. It is a part of the entire Bitcoin technology. In a complete sense, it is a decentralized distributed system.

The name blockchain is actually one-sided.

But everyone calls it that, so Cao Shen can only follow the local customs.

When Cao Shen died in the original world, the entire "blockchain" technology was still very immature, because this technology had an inherently insurmountable obstacle, the "impossible triangle".

The impossible triangle refers to decentralization, scalability and security. These three requirements cannot be met at the same time, and some trade-offs must be made.

This is actually very easy to understand. Decentralization, such as Bitcoin, requires all nodes to copy each transaction record and broadcast it to the entire network.

If there are N nodes, the work must be repeated N times. If a centralized network is used, it only needs to be recorded once, and at most two or three information backups are sufficient.

If you want to be both decentralized and secure, then the entire system must be very simple in terms of functionality and will not have any scalability.

Otherwise, it will inevitably be designed to be huge and bloated, which means there will be many vulnerabilities and security will not be achieved.

If you choose high scalability and security, you must design a rich interface and strictly control it to ensure security, which makes it difficult to achieve decentralization.

The original world's Bitcoin has a high degree of decentralization and security, but its performance is very poor. The network is often blocked, and users have to pay more transaction fees to let miners "package" transaction information first.

Later, EOS came out, claiming to have a million TPS and much higher performance than Bitcoin.

However, EOS sacrificed decentralization to achieve performance. It is not like Bitcoin where all nodes are equal, but has 21 super nodes.

Therefore, this project has also been questioned for being too centralized, not decentralized enough and not conducive to network security.

There are two reasons why blockchain has extremely high security requirements.

First, it is different from ordinary information networks, which is what we call the Internet.

In addition to running information data, a large amount of asset data runs on the blockchain.

If there is a security problem on the Internet, at most there will be data loss or data leakage.

If there is a security problem on the blockchain, it will be a very direct economic loss.

If the Internet is an information network, then the blockchain is an asset network.

It is also because money runs on the blockchain, so once this industry becomes popular, hackers and white hats all go to the blockchain to make a living.

Before the blockchain took off, domestic network security startups were actually very hard. Because the security business is very similar to a hospital, you won’t go to the doctor if you are not sick.

Generally, if there is no official mandatory requirement, or if there is no hacker attack, ordinary companies do not pay attention to network security. After all, buying security products is a cost, it cannot create revenue, and generally there is nothing to worry about.

This situation did not start to improve until the country implemented the mandatory requirements of Level Protection 2.0, and security companies could make a living according to the order.

Of course, top Internet companies still pay great attention to security issues, such as the two Ma dads. Several top white hats in China have been recruited by these two companies.

Another group of top white hats entered the blockchain to do security audits, changing their previous decline and making a lot of money.

Of course, powerful hackers also turned to the blockchain and made a lot of big and small operations, with ups and downs in the plot, which was more exciting than the movie.

The second reason why the blockchain emphasizes security is to ensure that the data on it cannot be tampered with.

Because tampering is a prerequisite for running smart contracts, it can even be said that all consensus algorithms of the blockchain are to ensure that the data cannot be tampered with.

The so-called smart contract, in simple terms, is a contract application that runs on the blockchain based on tamper-proof data, such as automatic buying and selling transactions.

Let's take a simple example, automatic deduction of mobile phone bills.

If it is a centralized system, the data is very easy to tamper with. After the hacker invades, he changes the user's phone package to a higher price, and then he can automatically deduct more money.

So this automatic deduction system cannot be called a smart contract.

The reason why online lottery was banned is also because it is a centralized system and has exploded. If it is done with blockchain, the data cannot be tampered with, and there is no such risk.

The system gave Cao Shen a cloud computing system. Cao Shen studied it carefully and found that it could take distributed computing to the extreme. He then figured out a way to solve the impossible triangle problem.

Although the company Cao Shen is working on now, Xishen Technology, is a centralized company, Cao Shen is a supporter of decentralization and a fan of distributed systems.

He wants to use this system, but the conditions are not yet mature. At least the hardware computing power and communication network cannot keep up, so he can only wait.

But it does not mean that nothing can be done. At least Cao Shen hopes that more people can master this technology and distributed concept.

Therefore, Cao Shen plans to take out some of the technology first, cooperate with the country, and build an "alliance chain".

The number of nodes in the alliance chain is limited, so it is not really decentralized. However, the road must be taken step by step. Let everyone feel the benefits of decentralization in a practical way.

When Zhang Fei heard that it was a new technology that could make information traceable and non-tamperable in the future, he felt it was very valuable, and he immediately promised to cooperate with Cao Shen's research.

Of course, blockchain also has three characteristics: decentralization, openness, and autonomy, which Cao Shen did not mention.

Since it is an "alliance chain", there must be an "alliance", so Zhang Fei took the lead in teaming up with six ministries and the Academy of Sciences to form a team with Cao Shen.

The specific operation is that each of the seven companies provides a data center to run data.

The entire system was deployed by Cao Shen himself. The seven companies are seven nodes that jointly maintain this "data ledger".

Because it is an experimental thing, no one dares to run real business data. However, if it is purely experimental data, the data volume may not be large enough, and the task processing complexity is also very low, making it impossible to test performance and security.

In the end, Mr. Cao patted his chest:

"Run my business data and I'll use some of it for experiments."

Mr. Cao is willing to contribute to national scientific research, and of course other companies readily agree.

Then, Mr. Cao spent another three days educating everyone about blockchain and distributed systems.

Some people are confused after all, cloud computing is still very new these days.

Some people think it sounds like nothing and is quite simple, but after looking back, they feel that it is unfathomable and involves a very wide range of knowledge.

Some simply don't understand the importance of it and simply give up. They just treat it as a task and execute it as directed by Mr. Cao.

In short, no matter what others think. Things were put into place and everything went smoothly.

Zhang Fei is also very happy. This time he is out of the circle, and he has joined forces with several ministries and scientific research institutes to be very proud.

So, everyone was happy.

I have been working on the search engine system for a week. The main reason is that the system first needs to use the NLP engine to read and understand the information on the entire network, and then select the corresponding search plan.

There are usually many technical solutions to choose from to solve a problem, which is called technology selection.

A true technical architect master is responsible for selection.

If a person's skills are very solid, we praise him for his good skills.

If a person is very good at selecting, then he is a master of taste.

Although Baidu has introduced new things and good practices in recent years, the technology selection of Baidu Tieba back then was quite interesting. The Tieba page that users see is actually the result rearranged according to the forum format after searching.

With the development of the Internet to this day, the amount of information on the Internet is quite huge. Even with the super data processing capabilities of the system, it took a week to clear it all without stopping for 24 hours of frantic processing.

If the system had a face, it would be so cool that it would turn green.

Of course, the system is shameless, but in a room with the air conditioner fully turned on, you can still see steam rising from the top of the system.

[Cao Cao, it’s so hot! 】

"The air conditioner has been turned to the lowest setting. You have an ice pack on your head, there are ice basins around you, and there is an electric fan blowing on you." Cao Shen was wrapped in a quilt and fought with the system.

Although Cao Shen was useless, Cao always felt that he was "fighting side by side". The specific way to cheer up was that Cao Shen kept asking:

"Is the system ready?"

"How much data is missing!"

"Can you come out today?"

[Thief Cao, if you press again, you will die! 】

As the system spoke, another wisp of "fairy energy" came out of its head.

"How about I shave your hair to dissipate the heat? It's so cool to have a bald head, and you don't have to wash it. How convenient!"

【Cao thief! My whole head looks like human hair, so be a human being! 】

"Okay, okay! How about I tie it up for you? It's hot when you put it on me, and it's scary."

[Okay, make it look nice]

"You don't even have a face, so what do you want to look good at?"

So, Cao Shen pierced the system with two Jiujiu sticks on his head, which were not symmetrical in size.

【So ugly! Thief Cao, you are too cruel, did you do it on purpose? 】

"No, no, no, I've tried my best." Cao Shen faced the system with a mirror:

"Actually, they look pretty good. They don't look like the steamed buns we usually eat. The one on the left is a small steamed bun, and the one on the right is a big meat bun!"

[Hey, it seems a bit similar. Look, it's still smoking, it's just out of the oven! 】

"Yeah, well, be good and I'll give you three pricks tomorrow, plus a soup dumpling!"

【OK! 】

[It’s time, it’s time for me to take an intermission! 】

"Okay, okay, go ahead."

The system's intermission is to do housework...

I don’t know why, but the system started to get obsessed with housework after cleaning the room for the first time.

When it comes to cleaning and organization, the system is very professional.

After taking over the housework task, she used her "titanium alloy" eyes to scan.

Looking at it, it seems that Cao Shen lives in a bacterial garbage dump!

Cao Shen can tolerate it, but the system cannot!

As a result, Cao Shen experienced the most rigorous cleaning in life.

Every nook and cranny, all kinds of disinfection supplies, all the objects in the house, every part of the system was not spared, and they were all cleaned.

Cao Shen felt that if he hadn't protested seriously, the system could have soaked him in formalin!

After cleaning, Cao Shen felt that even the tabletop was shiny and shiny.

Even under the influence of the system, Cao Shen doubted himself for the first time in his life. Am I dirty?

Seeing all the neatly arranged objects at home, Cao Shen almost doubted whether the system had obsessive-compulsive disorder!

And the key is that it was so neat that it felt like there was nothing to do.

There was no warmth at home!

Cao Shen was actually a little at a loss in his own home.

"Where is the paper on the right side of my desk?"

[Which paper are you talking about among the messy pile of papers on your desk? ]

"The one with the warehouse structure diagram."

[You have a total of twelve warehouse structure diagrams, be more specific]

"The one marked with red and blue pens, the vertical shelves..."

[The 27th paper in the stack of papers in the drawer on the right side of your desk]

"Where is my white T-shirt with a basketball pattern on the chest?"

[The fifth piece of the stack on the second layer of the sliding door on the east side of your closet]

"Bring it to me."

[Okay! ]

Cao Shen breathed a sigh of relief. Fortunately, the system remembers where things are after they are sorted.

The most frightening thing is that things are sorted, but where they are sorted is forgotten.

Every time the system cleaned up Cao Shen's messy house, it felt a happy sense of accomplishment. This sense of accomplishment made the system fall in love with doing housework.

Staring at Cao Shen all day: You put things in a mess, how can I clean it up if you don't throw them away!

Oh, by the way, I had takeout at noon. Go wash the lunch box, even if you want to throw it away, you have to throw it out cleanly.

When the host's washed clothes are dried, I will iron them. I just want to make them smooth and tidy like new to feel a sense of accomplishment...

These days, in addition to doing "reading comprehension", the system is thinking about what other housework can be done.

In order to prevent the system from being obsessed with housework and not doing serious things, Cao Shen even strictly stipulated that only rest time can be used to relax by doing housework.

Rest twice a day, one hour each time...

Finally, the moment to witness the miracle came a week later.

Cao Shen had imagined what a search engine based on a good NLP technology would look like.

Because in the original world, Cao Shen had seen a domestic team with strong NLP technology make such a thing.

A very powerful search engine, which makes it unavailable for commercial use and only serves internal purposes.

Cao Shen knew that there was still a big gap between the NLP technology in the original world and the one that the system brought out, but he did not expect that the search engine of the system would be so terrifying.

In other words, when the machine fully understands human language, the results are shocking.

Cao Shen randomly entered the name of an ordinary employee in the company, Li Dagang.

If it is Dudu, it basically searches for this person's name as a keyword in the whitelist website and returns the results.

You need to judge which link content points to the "Li Dagang" you are looking for based on other information about this person.

If this person has appeared on the Internet with this name, then you can search for some relevant information. If not, then Dudu may not be able to find any information.

Of course, with the development of technology, Dudu also uses NLP technology.

However, it is limited to that when you enter "Li Dayuegong", Dudu will prompt:

The search results for "Li Dagang" have been displayed. Still searching: Li Dayuegong

But the search engine made by the system is different.

The first step is to enter the name.

The second step is to return the search results.

This result is similar to that of Baidu on the surface, because there may be many duplicates of the entered name, and the search engine does not know which person you are looking for at this time.

The third step is that the user determines which link is the person you are looking for based on the returned search information and clicks on it.

At this time, the search engine begins to work. Because through your click, the search engine locates which Li Dagang you are looking for.

When you return to the search page again, the entire search content has changed, and all the content displayed is related to this "Li Dagang".

And these contents are not directly captured and presented after comparing the keyword "Li Dagang" on the Internet.

The system reads and understands the information of the entire network, understands the characteristics of "Li Dagang", and then searches based on these characteristics and returns the results.

In other words, it is not based on the name "Li Dagang", but on Li Dagang's behavior, his social relationships, his related information, and even the characteristics of his language expression to judge that this person is Li Dagang, and the information on this webpage is left by Li Dagang or is related to Li Dagang!

No matter if he used Li Dagang's name, no matter what ID he used, no matter if he was anonymous! No matter if others mentioned his name when discussing Li Dagang!

Relying on NLP technology, the machine understood the content of the entire network, understood Li Dagang, and "pulled" Li Dagang out.

So, Cao Shen saw Li Dagang's "life" on the search page, and it was automatically sorted by the search engine, just like Baidu Encyclopedia! Of course, relevant links were also attached.

Li Dagang's ID number, mobile phone number, family situation, college entrance examination score, scores in various subjects in college, how many girlfriends he had, what their names were, what happened between his girlfriends, what social relationships he had, what others said about him, who he followed, commented and liked on Weibo, what he was interested in, past shopping records, what movies and novels he had watched, what teams he liked, what swear words he had cursed, and even what web pages he had browsed and what hobbies he had...

And they also sorted by the closeness of social relationships, listing a large number of Li Dagang's classmates, colleagues, friends, teachers, etc.

And there are links that can be clicked, and the complete information of this person will appear when you click in.

No privacy!

Cao Shen tried again, but this time he did not enter Li Dagang's name, but entered a few characteristics of Li Dagang, such as age, school he graduated from, and work unit.

The search engine also located Li Dagang and returned detailed information.

Cao Shen entered "TT Technology" again, and a sorted page appeared again.

It has everything from products, technology, finance, operations to company news, gossip, etc.

In addition, there is all customer information and a complete list of employees.

Customer information and employee lists are also "caught" by comparison after understanding the information of the entire network.

Clicking on the customer information, you can also see what specific business it is, who are the two parties in the connection, and related news and gossip about this customer's business.

If you click on the product or technology, you can see all the information including official documents.

Although this is not an internal document but a public document, the information is also very complete, even including internal customer training materials!

This is the search I want!

Cao Shen slammed the table, but, this thing can't be used!

Planning to try again, Cao Shen entered the name "Xu Bingqian" in the search box.