Shulou(Shulou.com)06/03 Report--

What is the blockchain?

I heard the term blockchain in 2017, because it's impossible not to know it in the programming world. I know it because of Bitcoin (popularize the concept of Bitcoin: Bitcoin was originally proposed by a character like Satoshi Nakamoto in 2009. how did it come about? It has a specific algorithm, which is generated by a large number of calculations. Bitcoin economy applies a distributed database composed of Chinese nodes in the whole P2P network to confirm and record all transactions. His biggest difference is that the total number is limited. The monetary system once had no more than 12 million in four years, after which the total will be permanently limited to 21 million. I will sort out the specific things about Bitcoin and republish them), blockchain is an important concept of Bitcoin, it is essentially a decentralized database, and as the underlying technology of Bitcoin, a blockchain is a string of data blocks associated with cryptography, each containing information about a bitcoin network transaction. Used to verify the validity of its information and generate the next block.

The evolution of block chains is as follows:

Blockchain 1.0-Digital currency

Blockchain 2.0-Digital assets and Smart contracts

Blockchain 3.0-distributed applications in various industries

After saying so many written things, many people should still be puzzled by blockchain. In fact, the simplest sentence blockchain is a new concept of network, it is not a specific thing, it is a system.

Characteristics of block chain

Decentralization:

The word comes from English, not literally. In a system with many nodes, each node has a high degree of autonomy. Nodes can be freely connected to each other to form new connection units. Any node may be called a phased center, but it does not have a mandatory central control function. The influence between nodes will form a nonlinear causal relationship through the network. This open, flattened and equal system phenomenon or structure is called decentralization.

Openness:

The system is open, except that the private information of the parties to the transaction is encrypted, the data of the block chain is open to everyone, anyone can query the block chain data and develop related applications through open excuses, and the information of the whole system is highly transparent.

Autonomy:

Block chain uses consensus-based specifications and rest (such as a set of open and transparent algorithms) so that all nodes in the system can exchange data freely and safely in the environment of newcomers, so that the trust in "people" is changed to trust in machines, and any human intervention does not work.

The information cannot be tampered with:

Once the information is verified and added to the blockchain, it will be stored permanently, and unless more than 51% of the nodes in the system can be controlled at the same time, the modification of the database on a single node will be invalid, so the data stability and reliability of the blockchain are extremely high.

Anonymity:

Because the exchange between nodes follows a fixed algorithm, there is no need for trust (the procedural rules of the block chain will determine whether the segment-by-segment activity is effective or not). Therefore, trading teammates do not need to make each other trust themselves by way of public identity, which is very helpful to the accumulation of credit.

All right, having said so many of the above points is the system of the blockchain, as well as its advantages and disadvantages, and then let's talk about what industries it mainly uses and how it is used, and then you'll almost understand.

1: art industry

Ascribe (blockchain startup) allows artists to use blockchain technology to claim ownership and issue numberable, limited edition works that can be targeted at any type of work in digital form. It even includes a market where artists can buy and sell through their websites without any intermediary fees.

2: the legal profession

BitProof (blockchain startup) is the most advanced among the many document timestamp applications that have emerged in recent years, which will make the traditional notarization a thing of the past. BitProof offers more services than free versions such as Blocksgin and OriginStaemp, including one for intellectual property. Interestingly, BitProof recently worked with an IT school in San Francisco to put their students' academic certificates on the block chain, completely redefining how diplomas and student certificates are processed and used.

3: development industry

Colu was the first company to allow other companies to issue digital assets, and many people were impressed that they could "tokenize" a variety of assets. Although the free bitcoin wallet Counerparty also allows simple tokens to be issued and traded between other wallet holders, Colu tokens can be set in a variety of states and types, can be separated from or returned to the system, and can be stored on BitTorrent's network when the data is stored on the blockchain.

4: real estate industry

They plan to modernize the entire industrial chain process and solve the problems faced by everyone in participating in real estate, including naming process, land registration, agency agency, etc.

In fact, there are many industries, insurance industry, financial industry, Internet of things industry.

Let's talk about one of the most favored industries.

Logistics supply chain

The supply chain industry often involves many entities, including logistics, capital flow, information flow and so on. There is a lot of complex cooperation and communication between these entities. In the traditional mode, different entities keep their own supply chain information, resulting in a serious lack of transparency, resulting in high time costs and money costs, and once there are problems (counterfeit claims, counterfeit goods, etc.) are difficult to track down and deal with.

Through the block chain, all parties can obtain a transparent and reliable unified information platform, which can view the status in real time, reduce logistics costs, and trace the whole process of goods production and transportation, so as to improve the efficiency of supply chain management. When disputes occur, proof and tracing become clearer and easier.

This field is considered to be a promising application direction of block chain.

For example, the carrier scans the QR code to prove that the goods have arrived in the designated area and automatically charges the agreed fee in advance. We can refer to how the blockchain changes the supply chain finance and how the blockchain brings transparency to the supply chain.

Skuchain creates a new supply chain solution based on blockchain to synchronize commodity flow and capital flow while alleviating the problem of fake goods.

After talking about so many applications, the most important thing is to solve the trust and security problems of transactions.

In order to solve this problem, they put forward four technological innovations that are available in the Baidu library. If you are interested, you can take a look.

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