区块链开发是做什么,区块链开发怎么样

区块链开发是一种基于区块链技术的程序开发，旨在创建可扩展的、安全的、去中心化的应用程序和系统。它利用区块链技术的分布式账本、共识机制和加密技术，可以构建出可信赖的分布式应用程序。区块链开发可以拓展出很多相关关键词，比如智能合约、去中心化应用、区块链数据库等。

智能合约是一种无需受信任的可执行的自动执行的代码，它在区块链上运行，可以自动执行条件约定的任务。智能合约可以让用户实现去中心化的交易，而无需第三方的参与。智能合约可以被用来执行各种不同的任务，比如交易自动执行、资产管理、身份验证等。智能合约的安全性和可靠性可以通过共识机制来保证，因此可以被用来执行重要的商业任务。

去中心化应用是一种基于区块链技术的应用，它可以实现去中心化的交易、自动执行任务等。去中心化应用可以极大地提高交易的安全性和可靠性，同时也可以减少交易成本。去中心化应用可以被用来实现各种功能，比如支付、资产管理、身份验证等。去中心化应用的安全性可以通过共识机制来保证，因此可以被用来执行重要的商业任务。

区块链数据库是一种基于区块链技术的数据库，它可以实现去中心化的数据存储、共享和管理。区块链数据库可以提供高度安全性和可靠性的数据存储和管理，同时也可以减少交易成本。区块链数据库可以被用来存储各种数据，比如金融交易数据、资产管理数据、身份验证数据等。区块链数据库的安全性可以通过共识机制来保证，因此可以被用来执行重要的商业任务。

A. What is the use of blockchain and what can it do

Tell you briefly and crudely what blockchain is and what it can do?

What is blockchain? How does it work?

Bitcoin has become the trend of the modern Internet - and with it, blockchain. People say blockchain technology will lead to fundamental changes in how the internet works, how businesses work, and everything else.

But what is blockchain? Most of us don’t know much about blockchain. If you want to understand blockchain, you can read this article carefully.

What is blockchain? The editor will give a simple answer explanation

In the simplest terms, blockchain is a distributed ledger.

To understand what this means, we first have to look at its opposite: a centralized ledger. Because blockchain technology started with finance, we will also introduce it below using banks as an example.

The following is our process for using bank debit card transactions:

You can swipe your card to purchase goods in stores.

The merchant sends a statement to your bank for the agreed upon amount.

Your bank will verify that you may have authorized the purchase.

The bank sends the money to the merchant.

Finally, the bank records this information in its ledger.

There’s a lot of technology involved here, but that’s basically it. The last step is important - the bank records all transactions made by the customer. This ledger goes all the way back to the first transaction the bank made.

This ledger is kept, maintained and regulated by the bank. You can read it in your online bank account, but you can't change it. The bank has complete control. If it decides to make a change, there's nothing you can do about it.

Crucially, if hackers were able to access a bank’s ledger, that could cause a lot of problems. They can change the account balance to make it look like certain transactions never occurred, etc.

This is why distributed ledgers are so cool.

Blockchain Network Visualization

If a bank operates on a distributed ledger, each member of the bank will have a copy of the ledger, and whenever any member of the bank When they make a purchase, they tell every other member of the bank.

Each member will validate the transaction and add it to the ledger (the added records are called "blocks"). This has some important benefits, as there is no centralized authority that can manipulate records. Hackers accessing one ledger won't be a big problem because other ledgers can easily verify it.

On the other hand, it requires a lot of workdo. In short, the second system is blockchain (at least in financial scenarios).

As mentioned above, blockchain is a decentralized list of transactions. If I send Xiao Ming 2 Bitcoins, I send a message to everyone in the network saying "I am sending Xiao Ming 2 Bitcoins" and they all record the transaction.

Bitcoin and Blockchain

Let’s take Bitcoin as an example

Bitcoin transactions

But the transaction must be verified. This is where blockchain technology gets a little complicated. Every Bitcoin wallet (we'll do that in a second) has a public key and a private key.

You use your private key to send transaction requests to other members of the network and confirm that you have cryptocurrency in your account. If they do so, they allow transactions to be registered on the ledger.

The mechanics of a public/private key system are complex, but what it boils down to is that every transaction is verifiable and secure.

However, the entire system is computationally expensive. Everyone who updates the ledger needs to have a lot of authority to verify transactions and modify the ledger. This is where mining comes in. Those who verify and modify use their own computing resources, and they receive a small transaction fee each time.

And they are using a lot of electricity to do it.

This way, every transaction is verified and added to the ledger, and the person who verified and modified it gets paid. This is a reasonable system.

At the same time, it is also very safe. To change a single block, you must change every block after it. After all this work is done, verification will fail because other copies of the chain will show that someone tampered with one.

How to define blockchain is a difficult question

While the mechanisms behind blockchain technology are not always intuitive, it seems that explaining what blockchain is Not too difficult. But what we describe here is just the traditional definition.

We can use this special type of blockchain for a wide range of applications; such as cryptocurrency, sharing medical information, sending secure messages, etc. But more blockchain-like technologies are being developed for other uses.

For example, a company might use an internal blockchain to manage issue tracking in software. Each block on the chain may represent an issue, and users can publish updates to the network. But is this blockchain? In this case, the ledger is not public, it is only visible within the company.

Some people would say this is not blockchain.

Other technologies like blockchain are not encrypted. Are they still blockchain? What if it was centrally managed but used other blockchain features? What defines the lowest level of blockchain technology? to theseThere is no consensus on the issue yet.

What is a blockchain wallet?

We typically hear people talking about Bitcoin wallets, Ethereum wallets, and other cryptocurrency-specific wallets. But wallet technology can be used in any system that uses blockchain.

A wallet is a piece of software or hardware that “holds” your cryptocurrency. But it doesn't actually hold anything, it's just a place to store the public and private keys. This information allows you to access the currency as shown on the public ledger.

The wallet is the only record of your keys. Therefore, if you lose it, you will no longer have access to your cryptocurrency.

The future of blockchain, how will it change our lives?

One thing that is important about blockchain is that it is a public resource and no one really owns it because everyone owns it.

Blockchain is not just science fiction. We don’t need to understand the mechanism behind this technology, but you do need to understand that it may completely change our lives in the next 20 years.

This may sound bold, but remember, 20 years ago we were browsing the Internet on Netscape, using state-of-the-art Motorola flip phones, and buying our first DVD players. At that time, if we imagined that a computer could be held in our hands and that we could buy cars, make payments, and watch movies, it would have been considered a fantasy.

Although the impact of blockchain may not be as obvious as the Internet, nor as tangible as mobile phones, blockchain will effectively solve many worries in daily life. Such as intermediaries cheating people, transaction delays, etc. In our current lives, middlemen are everywhere and we take them for granted as a part of life. If one day these intermediaries cease to exist, you will find that the world will become a different place.

Imagine that by 2040, blockchain may become a mature and widely used technology. When one day you are inseparable from the blockchain just like you are inseparable from the Internet now, you will be surprised to find that this decentralized accounting technology has simplified the complexity and become part of your lifestyle.

First like
+1

B. What is blockchain development and can it solve any problems_Questions about blockchain

In a narrow sense, blockchain is a chain-modifiable data structure that combines data blocks in a chronological manner and is cryptographically guaranteed to be an untamperable and unforgeable distributed ledger. (Distributed database).

Broadly speaking, blockchain technology uses block chain data structures to verify and store data, uses distributed hidden hole node consensus algorithms to generate and update data, and uses cryptography to ensure data. Security of transmission and access, utilizing smart contracts composed of automated script codeA new distributed infrastructure and computing paradigm for programming and manipulating data.

Can solve the following problems for enterprises:

Evidence storage and collection

Use Renren BaaS to quickly enter business data into the chain, save it permanently, and cannot be tampered with by any person or institution.

Digital assets

No development is required. A variety of digital assets can be quickly created through the management backend, which can be used in many fields such as finance and points exchange

Anti-counterfeiting traceability< /p>

Based on Renren BaaS, create an ID for each product, which is widely used in e-commerce, food and drug safety, trade and other fields

Supply chain

Very convenient Adding management nodes can effectively improve the management and operation efficiency of the supply chain and reduce costs

C. I want to know what are the development applications of blockchain

There are many applications
Blockchain is the core supporting technology of the digital cryptocurrency system represented by Bitcoin. The core advantage of blockchain technology is decentralization. It can realize point-to-point transactions based on decentralized credit in a distributed system where nodes do not need to trust each other by using data encryption, timestamps, distributed consensus and economic incentives. Coordination and collaboration thus provide solutions to the common problems of high cost, low efficiency and insecure data storage in centralized institutions.
The application fields of blockchain include digital currency, certificates, finance, anti-counterfeiting and 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.
Taking the tourism industry as an example, blockchain applications are mainly focused on travel, travel community reviews, digital identity management, credit consumption management, tracking pilots’ professional certificates and qualifications, hotel and airline loyalty programs, and reservations. Management and consumption points management are several application areas. In addition, blockchain also has applications in finance, games, entertainment and other fields.

D. In what aspects is the development and application of blockchain trading systems

As for the application and development of blockchain technology, it is more about the trading system

General trading systems can be divided into over-the-counter, data currency, currency, point-to-point and matching trading systems

Among the existing enterprises that use blockchain technology for system development, Ying Tang Zhongchuang can be said to be the leader

Its system is positioned in a series of processes such as the issuance, management, and transaction of digital currencies. On the basis of fully supporting the Bitcoin trading system, it further Improve the digital currency transaction mechanism, including blockchain query and management functions. The system is developed using Java language, with stable and efficient system architecture and multiple encryption methods

E. Blockchain employment direction and prospects

Financial field: Blockchain technology can be used in digital currency, smart contracts, payment and settlement, etc., to bring more efficient, secure and convenient services to the financial field.

Internet of Things LeadershipDomain: Blockchain technology can realize authentication, secure communication and data management of IoT devices, thereby improving the security and reliability of the entire IoT system.

Public service fields: Blockchain technology can be applied to public service fields such as government affairs, education, and medical care, and plays an important role in information sharing, data privacy protection, and social governance.

Other fields: Blockchain technology can also be used in supply chain management, intellectual property protection, games and other fields, and has broad application prospects.

Therefore, from the perspective of employment, blockchain technology talents can choose to work in different types of units such as financial institutions, technology companies, innovative enterprises, government agencies, etc., and engage in blockchain technology Development, application research, technical support, project management and other related work. At the same time, you can also expand your career development path through entrepreneurship and other methods.

F. Want to know what are the development and applications of blockchain

The application scope of blockchain is spread across many industries

At present, the earliest one The application is Bitcoin, the blockchain underlying technology platform based on Bitcoin, as the name suggests, the Bitcoin network

Other blockchain underlying technologies now include IBM's Febric and Silver Chain's blockchain underlying technology Platforms, etc.

Up to now, the application of blockchain mainly has the following directions: 1

Financial industry

In the financial industry, blockchain It can be said to be the most popular FinTech (financial technology) in the world

There are also endless application cases in the financial industry, such as: Sunshine Insurance launched the "Blockchain Aviation Accident Insurance Card" on July 29, 2016 ”

Most aviation accident insurance will only issue insurance claims when an aircraft accident occurs. In most cases, fake insurance policies bought by customers are not easy to detect. Based on blockchain technology, the card documents can be traced from source to During the entire process of customer transfer, all parties can not only check the authenticity of the card, but also facilitate subsequent processes, such as claims settlement.

At the same time, without middlemen, the unit price of insurance cards will be significantly reduced

The economic benefits: You can buy one copy of this product for 60 yuan and can use it for 20 people. You can get aviation accident insurance of up to 2 million yuan each time, which is equivalent to getting 2 million yuan for 3 yuan each time. Yuan's protection

Saved consumer expenditures and insurance companies' costs to a great extent

There are also commercial bank collaterals released by Yinlian Technology in September 2016, etc. , this product is mainly used for the registration of real estate, vehicles and other assets to prevent repeated mortgages. It applies the consensus mechanism of the blockchain to improve inter-bank work efficiency

Financial Bank

G. What the blockchain can do

Heshu software analyzes it as follows;
There are so many things that can be done by joining the blockchain. Your computer computing power and your bandwidth will become the network A "bookkeeping book" in it helps manufacturers record the data they need.Even electricity is part of what is being shared.
Heshu Software will focus on promoting the legal circulation and commercial application of big data using blockchain technology.