区块链难学吗,区块链好学吗

近年来，随着区块链技术的发展，越来越多的人开始关注它。那么，区块链难学吗？区块链好学吗？

从一般角度来看，区块链技术比较复杂，涉及到计算机科学、数学、网络安全等多个领域，对于技术知识的要求也比较高。但是，只要你有心学习，并且把握好学习节奏，就能够比较快速的掌握区块链技术。

首先，学习区块链技术，需要学习比特币和区块链的基本原理，比特币是区块链技术的基础，而区块链技术则是比特币的升级版。了解比特币和区块链的基本原理，是学习区块链技术的第一步。

其次，学习区块链技术，还需要掌握智能合约的知识。智能合约是区块链技术的核心，是区块链技术的重要组成部分。智能合约的知识涉及到计算机科学、数学、网络安全等多个领域，因此，学习智能合约是学习区块链技术的重中之重。

此外，学习区块链技术，还需要学习区块链开发语言，比如Solidity、JavaScript等。这些语言可以帮助开发者快速的开发出区块链应用，因此，学习这些语言也是学习区块链技术的重要环节。

总之，学习区块链技术，需要学习比特币和区块链的基本原理、智能合约以及区块链开发语言。虽然，区块链技术比较复杂，但是只要有足够的耐心和努力，就能够掌握区块链技术。因此，我们可以说，区块链不难学，而且还比较好学。

❶ Self-Study Blockchain (6) BTC-Mining Difficulty

Let’s take a look at the mining calculation formula

H(block header ) target, this target is the target threshold

The hash algorithm used by BTC is SHA-256. The hash value it generates is 256 bits, so there are 2^256 values. This is him output space, to increase the difficulty of mining, adjust the proportion of the target value in this output space.

Mining difficulty is inversely proportional to the target threshold. When the computing power is strong, adjust the difficulty to make the target threshold smaller.

Without adjusting the difficulty, as the number of miners increases and the computing power increases, the time to mine a block will become shorter, from 10 minutes to 1 minute or even a few seconds. This What kind of problems will it bring? Many people may think this is not good. Waiting for six confirmations for a transaction will shorten the time and make the transaction faster. In fact, if the block generation time is shortened to a very short time, the risk is very high. Because of the network delay, the block generation time is shortened, and different nodes are likely to receive different block information, resulting in the emergence of many forked nodes. Miners will continue to mine based on the blocks they think are correct. In this case, it is easier for malicious nodes to launch a fork attack, because the computing power of honest nodes is dispersed.

As a result, it does not require 51% of the computing power to succeed, so shortening the block generation time is not conducive to the stability of the BTC system. Although 10 minutes is not necessarily the optimal time, it is still considered reasonable.

The following is the computing power growth curve

The following is the mining difficulty curve

The following is the average mining time

Let’s take a look at the difficulty formula: the mining difficulty is adjusted every 2016 blocks, and one block is produced every 10 minutes. On average, it is adjusted once every two weeks.

previous_difficulty is the last mining difficulty, and the denominator is the time spent in the last 2016 blocks

Each node mines independently, and the BTC protocol is also open source , will there be miners who do not modify the mining difficulty? The possibility exists, but it does not affect the result, because broadcasting to other nodes requires independent verification of the hash value of the block header. There is a compression code of difficulty in this header. The result of modifying the difficulty will not be recognized by honest nodes. .

❷ DistrictIs the blockchain major an unpopular major?

Yes

1. What is blockchain

Blockchain is a new Internet technology. Simply put, it is A decentralized distributed ledger, relying on the underlying cryptography foundation and a completely transparent operating rule established on the Lucky Network. Currently, there are many engineers in this field in the society, mainly in technology. At present, I am very optimistic about the development prospects. From an academic and scientific research perspective, this kind of advanced thinking can also be learned and used for reference. In the future, it may be able to solve many practical problems, such as financial mechanisms, privacy issues, etc. The technical threshold for learning blockchain is higher than that of other Internet technologies. When the popularity becomes big, more people will naturally rush to it. Moreover, it is still a relatively niche one. If you want to learn it, you mainly use the Go language. In addition, It is relatively difficult to learn more mathematical knowledge, algorithms, cryptography, etc. Of course, the salary when looking for a job will be relatively good, and ability and reward are directly proportional. What's more, two of the nine newly added occupations this year include the blockchain industry, which shows that this industry is getting more and more attention.

However, the banking and finance industry does not need a complete transformation of processes to adopt blockchain technology, and financial institutions are beginning to consider the use of blockchain technology. Blockchain is used in traditional banking services. Additionally, the ASX is planning to use a new blockchain-based system to manage Australia’s financial markets by the end of 2020.

Thirdly, blockchain will be integrated into government agencies in the future. The Estonian government has taken the lead in implementing it at the government level and can contain the information of all residents and citizens.

In the future, the demand for blockchain experts will grow rapidly, especially blockchain engineers and experts who already have relevant experience. Although it is possible that the start-up company you enter will fail due to immature technology or Investors were dissatisfied and withdrew their capital and went bankrupt, but blockchain is still a high-demand industry in the future.

Judging from the fact that the world is now starting to recruit talents, for example, in Australia’s Global talent project, Fintech has become an important field among the seven fields they need, and so far, no matter the number of people who have applied and the number of people invited are the smallest, because this industry is still relatively new in many countries. Compared with other fields such as agricultural technology, advanced manufacturing, medical technology, etc., which have many PhD or postdoctoral applications, current Fintech applicants still have a lot of industry experience to apply, which shows that talents in this industry are still very scarce, whether it is Domestic or foreign.

❸ Is it difficult to learn blockchain?

I recommend an introductory book "Blockchain" written by Zhang Jian, and then you can read more information about blockchain. Understand the current market situation with facts. If you want to speculate in currencies, you can first download a blockchain application store, which brings together all the necessary software for currency speculation on the market, including exchanges, wallets, information, communities, etc.The software is not particularly convenient for users who want to get started. You can search online and call it BeeStore.

❹ What are the requirements for learning blockchain technology

From the current talent demand in the blockchain field, it can be roughly divided into the following categories:
1. Build Distributed ledger applications based on DLT technology realize the business needs required by customers on DLT. Ripple is currently more famous in this field. So what DLT means, you will understand if you look at what Ripple is doing.
2. Develop your own applications on existing public chains. Most companies are currently doing this. This category is also characterized by low barriers to entry, high business potential, and low risks.
3. The company develops its own public chain. This type has the greatest future potential, but the risk and technical difficulty are also the highest.
4. Blockchain ecological infrastructure. For example, mobile wallets, hardware cold wallets, trading platforms, blockchain content platforms, etc. This category is currently the blockchain industry with the highest commercial profits. It has relatively low barriers and low risks, but there are many competitors.
If you start with technology, what languages ​​and knowledge do you need to learn?
For the first category, go language is necessary, because DLT is basically based on go language, and it also needs to master certain application development capabilities, because what is delivered to customers must be one piece of software rather than a bunch of Command line source program. As for the second category, the current mainstream of smart contracts is still the solidity language of Ethereum smart contracts, so if you want to enter the second category of companies, you need to start with Ethereum. For the third type of public chain development, the mainstream ones are C++ and Go, but there are also many famous projects implemented in Rust, such as: Facebook's Libra, Huobi Public Chain's Nervos, etc. The fourth category actually has little to do with blockchain technology, because developments such as trading platforms do not require blockchain technology.
In addition to the above technical hard power, the talents that blockchain companies prefer are "slash youths", that is, talents who master knowledge in multiple fields at the same time. They are mainly divided into three categories: finance and regional Blockchain, content operation and blockchain, community operation and blockchain. Among them, the third type of talents is the rarest, because most technical talents are not good at communication. However, due to its distributed characteristics, blockchain particularly requires the joint efforts of the community to create and Maintain a chain.
Finally, many people mistakenly believe that blockchain is a brand new industry and that blockchain is completely incompatible with traditional fields. This is actually a big misunderstanding. From what is written above, you can also find that blockchain In the final analysis, blockchain still has to solve actual needs in reality. The only difference is that the tools for solving needs have changed. So don’t think that just knowing blockchain can kill everyone. Choose the demand field you want to enter, and have the necessary skills in that demand field. The basic knowledge required is still very important.
The application areas of blockchain include digitalCurrency, tokens, finance, anti-counterfeiting traceability, privacy protection, supply chain, entertainment, etc. With the popularity of blockchain and Bitcoin, many related top domain names have been registered, which has had a relatively large impact on the domain name industry.

❺ How to develop blockchain technology? Is it difficult?

Blockchain technology belongs to the software development industry. If the technology is in place, it will definitely not be difficult. Otherwise, it will be difficult if you don’t know anything about it. It’s as difficult as climbing to the sky, you can measure your own level, if not, outsource it

❻ Is blockchain technology easy to learn? Can you learn it if you don’t have a high degree?

Blockchain technology is a very complex technology Technology. Of course not too studious. Because if it is very good, it will not be so valuable if it is empty. But people with low academic qualifications can also learn, because learning like this also relies on talent.
Blockchain is a term in the field of information technology. In essence, it is a shared database, and the data or information stored in it has the characteristics of "unforgeable", "full traces left", "traceable", "open and transparent" and "collectively maintained". Based on these characteristics, blockchain technology has laid a solid foundation of "trust" and created a reliable "cooperation" mechanism, which has broad application prospects.
Characteristics of blockchain technology.
Decentralization. Blockchain technology does not rely on additional third-party management agencies or hardware facilities, and there is no central control. In addition to the self-contained blockchain itself, each node realizes self-verification, transmission and management of information through distributed accounting and storage. Decentralization is the most prominent and essential feature of blockchain.
Openness. The foundation of blockchain technology is open source. In addition to the private information of the transaction parties being encrypted, the data of the blockchain is open to everyone. Anyone can query the blockchain data and develop related applications through the public interface. Therefore, the entire System information is highly transparent.
Independence. Based on consensus specifications and protocols (similar to various mathematical algorithms such as the hash algorithm used by Bitcoin), the entire blockchain system does not rely on other third parties. All nodes can automatically and securely verify and exchange data within the system without the need for any human intervention.
Security. As long as you cannot control 51% of all data nodes, you cannot manipulate and modify network data at will. This makes the blockchain itself relatively safe and avoids subjective and artificial data changes.
Anonymity. Unless required by legal regulations, technically speaking, the identity information of each block node does not need to be disclosed or verified, and information transfer can be carried out anonymously

❼ How to learn blockchain technology

There has been a lot of news recently about various digital currencies. Bitcoin is the one that everyone is most familiar with, and it has been a hot topic a long time ago. There are many people who make a lot of money from this. Of course, different countries have different recognitions of Bitcoin, but no matter what the future trend of Bitcoin is. People who know the industry should see more than just digital currencies such as Bitcoin, because these are temporary hot spots after all. Which currency can make it to the end?It's still something worth speculating on.
Bitcoin is just an application product brought about by new technological innovation, and what really changes future technology is not the digital currency, but the blockchain technology behind it. Recently, whenever blockchain technology is mentioned, it will become a hot topic. However, as everyone knows, some well-known Internet companies such as Internet, Tencent, Xiaomi, and Xunlei have been unconsciously conducting research in the field of blockchain for a long time.
While ordinary netizens are still obsessed with hyping various virtual currencies, smart people have already begun research and study on blockchain technology. Of course, since it is a new technology, not many people know how to show it, and even fewer people study it in depth. But in any case, blockchain technology has deeply entered the research scope of various large companies. As more powerful companies invest in research in this area, the demand for blockchain technology talents will increase.
Things are rare and valuable, but the same is true for people. When the market demand for blockchain technology becomes greater and greater, and even when new product applications created by blockchain technology appear in the future, the demand for blockchain talents in the entire Internet community will far exceed that of iOS back then. The scene in heat. Of course, for those who understand blockchain technology, the objective salary will also become the envy of other technical professionals.
Go language is the second open source programming language released by Google in 2009.
The Go language is specially optimized for programming multi-processor system applications. Programs compiled using Go can be as fast as C or C++ code, are more secure, and support parallel processes. Not only can you develop the web, but you can also develop the underlying layer. Currently, Zhihu is developed using golang. The preferred language for blockchain is go, Ethereum, and Hyperledger are all based on go language, as well as the go language version of btcd.
The goal of Go is to improve the dependency of existing programming languages ​​on libraries and other programs. Management, these software elements will be called repeatedly by the application. This language is also designed to solve multi-processor tasks due to the existence of parallel programming models.
Google has high hopes for Go. Its design is to allow the software to take full advantage of the simultaneous multitasking of multi-core processors and to solve the troubles of object-oriented programming. It has modern programming language features, such as garbage collection, to help programmers deal with trivial but important memory management issues. Go is also very fast, almost as fast as C or C++ programs, and can quickly create programs.
Go's website was built using Go, but Google has greater ambitions. The software is specifically designed for building server software (such as Google's Gmail). Google believes that Go can also be applied to other areas, including executing software within the browser and replacing the role of JavaScript.

❽ What courses do you need to learn in blockchain?

The courses you need to learn in blockchain are: 1.Khan Academy; 2.Udemy; 3. Lynda; 4. Coursera; 5. PluralSight, etc. In addition, to learn blockchain, you must also know the relationship between blockchain and programming languages. It is recommended to learn blockchain development based on Go language and Java, and Go language is slightly less difficult to learn than Java.

❾ How to get started with blockchain. These knowledge are not difficult to learn.

1. To learn blockchain knowledge, first learn the necessary concepts of blockchain knowledge.

2. [Blockchain]

The English name blockchain is the underlying technology of Bitcoin and a decentralized accounting method.

3. [Block and Chain]

Block refers to the information block that records transaction information. Each block contains three main factors: The ID of the block, the odd number of the transaction, and the ID of the previous block.

The Bitcoin system generates a block approximately every 10 minutes. Each block contains the ID of the previous block, making the blocks form a complete transaction chain. The longest one is The only master blockchain.

4. [Bitcoin]

Bitcoin is a practical application of blockchain technology. It is a peer-to-peer electronic cash payment system that first existed as a virtual currency. , Japan has recognized the legality of Bitcoin and can use Bitcoin for shopping.

5. [Satoshi Nakamoto]

The legendary founder of Bitcoin published a paper on a peer-to-peer electronic cash system in 2008, marking the The birth of Bitcoin.

6. [Digital Currency]

It is completely different from the Q coins and other virtual currencies we use to play games in real life. For example, in Japan, although Bitcoin is a digital currency , but it can already be used to purchase goods in real scenarios.

7. [PoW]

A type of consensus mechanism, also known as proof of work. Bitcoin currently uses this consensus mechanism. It is relatively simple and easy to reach consensus, but consumes huge amounts of energy and is prone to bifurcation.

8. [PoS]

A type of consensus mechanism, also known as proof of equity. People with greater equity have a higher probability of becoming bookkeepers, but bookkeeping Human ones are not necessarily professional, don’t consume much energy, and are prone to split ends.

9. [DpoS]

On the basis of PoS, the bookkeepers are changed from unprofessional to professionals, like the EOS we are familiar with. In this consensus method, holders jointly select 21 nodes and 100 pre-determined nodes.Prepare nodes to reach consensus through the EOS constitution and jointly incubate the ecology on EOS.

10. [Public key and private key]

In the world of blockchain, the public key is equivalent to the bank account number, and the private key is equivalent to the bank account number + withdrawal password. The private key is essentially an array of 32 bytes. The private key can generate the public key and address, but this behavior is irreversible, so it is crucial to keep the private key. Losing the private key is equivalent to losing money. And it can never be found back.

11. [Hash value]

It can be simply thought of as a set of data that is closely arranged together. No item in the data can be changed, otherwise The calculated consequences will be very different.

12. [Smart Contract]

It is a commitment in digital form. Both parties involved can execute these commitments on the network without artificial restrictions.

13. [Credit Consensus]

Based on the characteristics of blockchain, it is a distributed accounting method that cannot be tampered with and is irreversible. A mechanism of trust that allows many people to form a trust based on digital algorithms.

14. [Public chain and private chain]

Public chain refers to a blockchain that can be participated in and read by people all over the world, and is open to everyone , while the private chain is only in the hands of an organization and is only open to individuals or entities.

Blockchain is currently a hot topic. Many traditional large enterprises and venture capital are actively participating in the layout and investment of the blockchain industry. As the general public, we must master the necessary blockchain knowledge. , helps us judge and analyze real-world information and protect our investments.