区块链技术互联网时代的特点,区块链技术互联网时代是什么

区块链技术互联网时代是一个以新技术为基础，以互联网为支撑，以普及化和全球化为目标的新时代。关键词：区块链，互联网，普及化。

区块链：区块链技术是一种分布式账本技术，它可以实现数据的安全存储和传输，并且可以被多方共同维护。区块链技术的最大特点是其在网络中的数据是不可篡改的，所有的数据都是通过密码学算法加密的，它可以有效地防止数据的被篡改，从而被用于保护数据的安全性。此外，区块链还支持智能合约，可以自动执行用户之间的交易，这样就可以大大提高交易的安全性和效率。

互联网：互联网是一个全球性的网络，它把世界上所有的计算机网络都连接起来，形成一个全球性的网络系统。互联网的发展使得人们可以轻松地进行信息检索、网络交流和在线购物，这也为区块链技术的发展提供了极大的便利。互联网的发展使得区块链技术可以在全球范围内进行应用，使得区块链技术的发展可以更加快速，更加广泛。

普及化：普及化是指技术的普及和使用，是技术发展的重要标志。区块链技术的普及化是其发展的必经之路，它可以使得技术更加安全，更加可靠，更加有效，也可以使得技术更加普及，更加普遍。普及化的技术可以让更多的人了解并使用，也可以让技术更加完善，更加可靠，更加有效。区块链技术的普及化也将有助于其在全球范围内的推广，使得技术可以更加广泛地应用，从而改善人们的生活。

⑴ What is blockchain technology? What exactly is blockchain?

Blockchain technology is one of the top ten typical judicial technology applications on the Internet. Blockchain is a new application model of computer technologies such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithm.

Blockchain is an important concept of Bitcoin. In fact, it is a decentralized database. Blockchain, as the underlying technology of Bitcoin, is a series of data blocks generated using cryptographic methods. Each data block contains a batch of Bitcoin network transaction information, which is used to verify the validity of its information (anti-counterfeiting) and generate the next data block.

Blockchain originated from Bitcoin. On November 1, 2008, a person who called himself Satoshi Nakamoto published the article "Bitcoin: A Peer-to-Peer Electronic Cash System", which elaborated on P2P network technology, encryption technology, timestamp technology, and block technology. The concept of electronic cash system framework such as chain technology marks the birth of Bitcoin.

(1) Blockchain Technology Extended Reading in the Internet Era:

The Birth of Blockchain:

The concept of blockchain was first proposed by Satoshi Nakamoto in 2008. In the following years, blockchain became the core component of the electronic currency Bitcoin: a public account for all transactions. By using peer-to-peer networks and distributed timestamp servers, blockchain databases can be autonomously managed.

The blockchain invented for Bitcoin made it the first digital currency to solve the problem of repeated consumption. Bitcoin design has become a source of inspiration for other applications. On December 20, 2016, the Digital Currency Alliance-China FinTech Digital Currency Alliance and FinTech Research Institute were officially established.

⑵ The History of the Birth of Blockchain

Many people will be instinctively intimidated when they hear the word "blockchain", thinking that it is unpredictable content or A technology has nothing to do with me.

2018 is the first year of blockchain technology. In the past Spring Festival, blockchain has become really popular. The "three o'clock sleepless zone" of the first blockchain community "Blockchain", articles from major media "How to introduce blockchain to seven aunts and eight aunts", novices from all walks of life are ready to enter the currency circle and try their best, etc.

We know that the Internet has connected the world over the course of decades. People don’t talk about whether the world is flat, because as long as you have a computer or a mobile phone, you are closely connected to the entire world. Elites are accustomed to calling the past Internet era the information Internet era.

With the advent of blockchain technology in 2008, humans were caught off guard and drawn into the world of bits. In the future, no matter whether you understand whether you know what blockchain technology is? Do you understand how digital virtual currency is implemented? They were all coerced into entering the Internet.The second era: the era of value Internet. What you don’t know is how blockchain technology was born?

David Chaum, the "bishop" figure of cypherpunk in the 1980s and 1990s, invented the cryptographic anonymous cash system Ecash in 1990. Chaum believes that a distributed, truly digital cash system should encrypt people’s privacy.

British cryptographer Adam Baker invented Hashcash in 1997, which used the Proof of Work system. The proof-of-work system is one of the core concepts of Bitcoin.

In 1997, Harper and Stonitta proposed a protocol that uses timestamps to ensure the security of digital files. This protocol has also become one of the prototypes of the Bitcoin blockchain protocol. The biggest feature of timestamps is that when a virtual currency is traded, it is timestamped and it cannot be changed.

Cryptozoology expert Dai Wei invented B-money in 1998. B-money emphasizes point-to-point transactions and immutable transaction records, and every trader in the network keeps track of transactions.

In 2004, Hal Finney, a top developer at PGP Crypto Company, launched the electronic currency "Crypto Cash", which used a reusable proof-of-work mechanism (RPOW).

But their single invention and idea are still not enough to become a world-class virtual currency. Ecash declared bankruptcy in 1998; the proof-of-work system cannot guarantee whether digital currencies have been traded many times; the technical protocol of timestamps is only used on a small scale by the government; in the B.money system, David did not solve the problem of ledger synchronization; finally Halfini's idea is still not enough to become a world-class virtual currency.

In 2008, when all technical conditions were mature and time conditions were mature, a god-level figure was still needed to answer a question: why did the previous virtual currency pioneers fail? The name of the person who answered this question is Satoshi Nakamoto.

He believes that the most important reason for the failure of previous virtual currencies is that they all have a centralized structure, and all transaction data will be aggregated into the company's data center, which is no different from currency issued by the government. Once the company that backs the virtual currency goes bankrupt, or the central server of the general ledger is compromised by hackers, the virtual currency will face the risk of collapse. Satoshi Nakamoto optimized David Chaum's Ecash, integrating timestamps, proof-of-work mechanisms, asymmetric encryption technology, and the structure of UTSO, and ultimately he invented Bitcoin.

It can be seen that blockchain is not a single technology, it is a collection of a series of above-mentioned technologies. Bitcoin is only the first large-scale application of blockchain technologyTypical Case. In the future, blockchain technology can be applied to many fields such as financial services and social life.

⑶ What is blockchain and how to introduce blockchain in a simple and easy-to-understand manner

Many people don’t know what blockchain is. Here I will give you a detailed introduction to blockchain. Chain is a new technology that subverts the old model. Just like people tend to ignore the invisible but indispensable oxygen, people often ignore the most important thing in the market economy, which is trust. Without trust, no transaction can be established.

In addition, different races, nationalities, cultures, religious beliefs, etc. will form a trust gap. Due to the lack of mutual understanding and necessary trust between strangers, it is difficult for transactions to occur. The market economy emerged in large numbers among strangers. The emergence and development of the market economy lies in the birth of a new mechanism, which solves the problem of trust between strangers.

The concept of blockchain was first proposed in a paper written by Bitcoin founder Satoshi Nakamoto in 2008. Blockchain can be understood as a kind of public accounting. Technical solution: All data will be open and transparent, without the need for a central server as a trust intermediary, thus ensuring the authenticity, immutability and credibility of information on a technical level. The immutability of data is very important.

Because the blockchain has the technical characteristics of large-scale expansion, open and transparent data, and because the data of each client is consistent, even if some clients are destroyed, it will not affect the reliability of data security. In particular, it can effectively solve the problem of trust between strangers, so this technology can be extended to all fields that can be digitized, such as digital currency, payment settlement, digital bills, proof of rights, credit information, government services, medical records, etc. If blockchain technology develops, it will be closely related to everyone in the future.

⑷ Blockchain: The "gold shovel" in the post-Internet era

Article\Meng Yonghui

There is a very famous line in the movie "The Godfather" : Great people are not born great, but show their greatness in the process of growth. Contrary to this line, the blockchain is destined to have a glorious and great life from the moment it was born. Mysterious preachers, fanatical supporters, cryptic fearers...many words related to blockchain are mixed in. Suddenly, the blockchain has already transcended its own meaning.

Just as every trend comes, there will be speculators involved, and the arrival of the blockchain trend is no exception. Capital's huge expectations for the blockchain era, entrepreneurs' desperate efforts on blockchain, and the market's complete emphasis on blockchain have made this originally mysterious and slightly obscure word appear in front of people again and again, so that people Forgetting that its "mother body" has not yet achieved universal recognition in the real world.

There is no love without reason, and there is no hate without reason. People's love and hate for blockchain technology also reveal the complex relationship between them that is constantly being cut and confused. BlockchainThe fervor of the times is no accident, just as it is obvious that the city of Rome was not built in a day. When we explore the underlying reasons for the popularity of blockchain, we can always find a sudden enlightenment that makes us see the sun through the clouds. So, why is blockchain technology so popular?

Everything has a cause and effect, and the popularity of blockchain is no accident

When the tide of the Internet rushes away, in addition to leaving colorful shells on the beach at low tide, there are also The huge anticipation of the next trend among the people who picked up the shells dropped. When the stormy moment comes, people begin to look forward to picking up more shells at the next high tide.

No matter from which angle you look at it, the Internet era is an era worth remembering. In this era, people's lifestyles have changed more profoundly than in any previous era. It is foreseeable that this era is destined to become a bright spot in the vast history, leaving an indelible impression on people.

Everything great must have repercussions. The changes brought to us by Internet technology make us full of expectations for the next wave of technology. After experiencing the double baptism of the traditional Internet era and the mobile Internet, people's lives have undergone earth-shaking changes. Today's Internet has become an infrastructure like water, air, and electricity. All aspects of people's lives are connected to the Internet, and it has fundamentally subverted people's original lifestyles.

It is precisely because the Internet technology is so great that it has strengthened people’s confidence in looking for the next technology to subvert or optimize the existing lifestyle and industry logic, trying to find new developments through the blessing of new technologies. direction. The emergence of blockchain technology is like a dry land that has not rained for a long time. A spring rain awakens people's hearts.

The expectations for blockchain technology are no less than those of the Internet era. In that era, there were always many steadfast believers and practitioners. It was they who devoted themselves to the wave of Internet entrepreneurship that made the Internet The era saw the emergence of trend-setters who dared to ride the wind and waves, and truly became the winners of that era with their gorgeous and colorful dances. Whether they are Internet giants or unicorn companies, they are the huge wealth left to people in the Internet era. Perhaps it is precisely because of this that people are full of expectations for the arrival of the next wave of technology.

It’s hard to be perfect. The Internet's tentacles have not yet reached unknown areas that have opened up space for people's imagination. Although Internet technology has penetrated into every corner of people's lives, simply adding Internet technology to the industry cannot bring changes to the industry. The industry needs more in-depth technical participation to find an entry point to subvert the original business logic. . The emergence of a mysterious figure named Satoshi Nakamoto broke this silent situation. His mystery just increased mankind's huge curiosity about exploring the unknown world.

Although Internet technology has opened a key to a new life for us,But after opening the door to a new life, people still need to work hard to find the true meaning of the new life. How to find the true meaning of a new life, relying solely on the Internet can no longer play a corresponding role. Blockchain is the shovel that allows people to truly find the true meaning of life. Through it, people may be able to find the life they really want.

The popularity of blockchain is just like Rome was not built in a day. The needs of the industry, the blessing of technology, the promotion of capital, and the needs of users are all the reasons for the popularity of blockchain. As people continue to deepen their research on blockchain technology, a bright picture drawn by blockchain technology may slowly unfold, and a new era will come.

Under the sky of history, what is the new era opened by blockchain?

The huge changes that the Internet era has brought to people’s lives have allowed us to see the tremendous power that the blockchain era will bring to our lives. So, what kind of era will the blockchain era usher in? What kind of life will we get in the blockchain era?

Blockchain technology will make decentralization in the Internet era truly possible. Although deintermediation in the Internet era has improved the efficiency of all walks of life, this deintermediation is about establishing a platform and a center. The current traffic giants are the inevitable result of the de-intermediation development in the Internet era. This approach of establishing a new center to achieve the effect of de-intermediation can only bring changes to the development of the industry on a relatively superficial level. This change does not count as true disintermediation; it leads to the formation of a new center.

Through blockchain technology, we can truly achieve disintermediation and decentralization, that is, our individuals have truly become individuals participating in the operation of the industry. In a sense, the advent of the blockchain era has made deintermediation possible, and may even make it possible for the Internet giants that are currently in full swing to be circumvented. Users and industry participants have truly become the core elements of industry operations, and truly seamless connection can be achieved through blockchain technology.

Blockchain technology will make many beautiful visions of the Internet era possible. As an external technology, Internet technology uses one technology to adapt to all external industries and establishes new centers one after another based on each industry. These new centers are unicorn companies in the industry or Internet traffic giants. In essence, Internet technology cannot change the industry itself.

In the Internet era, we will try to use the Internet to bring about changes in the industry itself. However, as it develops, we find that simply adding the Internet cannot bring changes to the industry. , we must start from the technology of the industry itself to bring real changes to the development of the industry. Blockchain technology canWe can start from within the industry and bring about internal changes in the industry by changing its own elements, so as to solve the pain points and problems that cannot be solved in the Internet era with the help of blockchain technology.

In a sense, the advent of the blockchain era will fundamentally change many of the impossible pain points and problems in the Internet era. As blockchain technology becomes increasingly integrated with external industries, especially as "Blockchain+" gradually takes shape, a new era of blockchain will come.

Blockchain technology will fundamentally change the original industry logic. In the Internet era, technology plays the role of an external intervenor, and it itself does not have many applications for the industry. After entering the blockchain era, we can remix and adjust the original industry operating logic, ultimately causing fundamental changes in the industry itself.

It is worth noting that blockchain technology is changing on the basis of inheriting the legacy of the Internet. The use of blockchain technology only changes the operating logic of the crude oil industry, and its application needs to take advantage of the Internet era. One of the important reasons why technology companies represented by Tencent, Facebook, and Meitu took the lead in entering the blockchain field is that they have accumulated many advantages in the Internet era, and these advantages give them the ability to make changes.

By changing the operating logic of different industries, the blockchain era will form a new era that is truly user-centered. The common connection between users and industry elements will make the industry’s original Make changes logically and truly form a business model that conforms to the operating logic of the blockchain itself.

The advent of the blockchain era has opened up a strange and wonderful picture for us. The swarming wave of the Internet era has made the entire blockchain face a diversified development pattern. As blockchain technology develops and matures, the industry structure centered on Internet giants formed in the Internet era will be broken, and a new era of deintermediation will truly begin.

⑸ What are the core blockchain technologies of blockchain technology?

What is the hottest Internet topic at the moment? You don’t need to explain it to the editor to know that it is the blockchain. Blockchain technology, but many friends have only heard of this technology and do not have much in-depth understanding of it. So what are the blockchain technologies? Below we will bring you an introduction to the core technology of blockchain for your reference.
What are the core elements of blockchain technology?
Blockchain technology, which can be a public ledger (visible by anyone) or a permissioned network (visible only by those authorized), solves supply chain challenges , because it is an immutable record that is shared among network participants and updated in real time.
Blockchain technology----data layer: designing the data structure of the ledger
Core technology 1. Block + chain:
Technically speaking, a block is a data structure that records transactions, reflecting the flow of funds for a transaction. The blocks of transactions that have been reached in the system are connected together to form a main chain, and all nodes participating in the calculation record the main chain or part of the main chain.
Each block consists of a block header and a block body. The block body is only responsible for recording all transaction information in the previous period, mainly including the number of transactions and transaction details; the block header encapsulates the current version number, previous A block address, timestamp (recording the time when the block was generated, accurate to the second), random number (recording the value of decrypting the answer to the math question related to the block), the target hash value of the current block, and the Merkle number Root value and other information. From a structural point of view, most functions of the blockchain are implemented by the block header.
Core technology 2. Hash function:
The hash function can convert data of any length into a set of fixed-length codes through the Hash algorithm. The principle is based on a cryptographic one-way hash function. This kind of function is easy to verify, but difficult to crack. Usually, the industry uses y=hash(x) to represent it. This hash function implements operations on x to calculate a hash value y.
Commonly used hash algorithms include MD5, SHA-1, SHA-256, SHA-384 and SHA-512, etc. Taking the SHA256 algorithm as an example, inputting any string of data into SHA256 will result in a 256-bit Hash value (hash value). Its characteristics: the same data input will get the same result. As long as the input data changes slightly (for example, a 1 becomes a 0), a completely different result will be obtained, and the result cannot be predicted in advance. Forward calculation (calculating the corresponding Hash value from the data) is very easy. Reverse calculation (cracking) is extremely difficult and is considered impossible under current technological conditions.
Core technology 3. Merkle tree:
Merkle tree is a hash binary tree, which can be used to quickly verify the integrity of large-scale data. In the blockchain network, the Merkle tree is used to summarize all transaction information in a block, and ultimately generates a unified hash value of all transaction information in the block. Any change in transaction information in the block will cause Merkle tree changes.
Core technology 4. Asymmetric encryption algorithm:
Asymmetric encryption algorithm is a key secret method that requires two keys: public key and private key. The public key and the private key are a pair. If the public key is used to encrypt data, only the corresponding private key can be used to decrypt it, thereby obtaining the corresponding data value; if the private key is used to sign the data, then only the corresponding public key can be used to sign the data. In order to verify the signature, the sender of the verification information is the holder of the private key.
Because encryption and decryption use two different keys, this algorithm is called an asymmetric encryption algorithm, while symmetric encryption uses the same key in the encryption and decryption processes.
Blockchain technology----network layer: realizing the decentralization of accounting nodes
Core technology5. P2P network:
P2P network (peer-to-peer network), also known as point-to-point technology, is an Internet system that does not have a central server and relies on user groups to exchange information. Unlike a centralized network system with a central server, each client in a peer-to-peer network acts as both a node and a server. Domestic Xunlei software uses P2P technology. The P2P network has the characteristics of decentralization and robustness.
Blockchain technology----Consensus layer: allocate the task load of accounting nodes
Core technology 6. Consensus mechanism:
Consensus mechanism is how to reach consensus among all accounting nodes to identify The validity of a record is both a means of identification and a means of preventing tampering. There are currently four main types of consensus mechanisms: PoW, PoS, DPoS and distributed consensus algorithms.
PoW (Proof of Work, proof of work): PoW mechanism, which is like Bitcoin’s mining mechanism, miners package existing transactions that have not been recorded by the network into a block, and then continue to traverse and try to find a random number , so that the hash value of the new block plus the random number meets certain difficulty conditions. Finding a random number that meets the conditions is equivalent to determining the latest block of the blockchain, and is also equivalent to obtaining the current round of accounting rights of the blockchain. Miners broadcast blocks that meet the mining difficulty conditions in the Yuanfu network. After verifying that the block meets the mining difficulty conditions and that the transaction data in the block meets the protocol specifications, other nodes in the entire network will each Blocks are linked to their own version of the blockchain, thereby forming a network-wide consensus on the current network state.
PoS (ProofofStake, Proof of Stake): PoS mechanism requires nodes to provide proof of a certain number of tokens to obtain a distributed consensus mechanism for competing for blockchain accounting rights. If you rely solely on the token balance to determine the bookkeeper, you will inevitably make the rich win, which will lead to the centralization of bookkeeping rights and reduce the fairness of the consensus. Therefore, different PoS mechanisms use different methods to increase the amount of money based on the proof of equity. The randomness of accounting rights avoids centralization. For example, in the PeerCoin PoS mechanism, the Bitcoin with the longest chain age has a greater chance of obtaining accounting rights. NXT and Blackcoin use a formula to predict the next accounting node. The more tokens you own, the greater the probability of being selected as an accounting node. In the future, Ethereum will also switch from the current PoW mechanism to a PoS mechanism. Judging from the information currently available, Ethereum's PoS mechanism will use nodes to place bets on the next block. The winner of the bet will receive an additional Ethereum currency award. Those who do not win will be deducted Ether coins to reach consensus on the next block.
DPoS (DelegatedProof-Of-Stake, share authorization certificate): DPoS is easy to understand and is similar to the modern corporate board of directors system. The DPoS mechanism adopted by BitShares is that shareholders vote to select a certain number of witnesses. Each witness has two seconds of authority to generate blocks in sequence. IfIf a witness cannot generate a block in a given time slice, the block generation authority is given to the witness corresponding to the next time slice. Shareholders can replace these witnesses at any time by voting. This design of DPoS makes the generation of blocks faster and more energy-saving.
Distributed Consistency Algorithm: Distributed Consistency Algorithm is based on traditional distributed consistency technology. Among them are Byzantine fault-tolerant algorithms that solve the Byzantine Generals problem, such as PBFT (Byzantine fault-tolerant algorithm). In addition, distributed consensus algorithms (Pasox, Raft) that solve non-Byzantine problems are not explained in this article. This type of algorithm is currently a commonly used consensus mechanism in alliance chain and private chain scenarios.
Taken together, POW is suitable for public chains. If you build a private chain, it is more suitable to use POS because there is no trust problem in verification nodes; and because there are untrustworthy local nodes in the alliance chain, it is more suitable to use DPOS.
Blockchain technology----Incentive layer: Develop a "salary system" for accounting nodes
Core technology 7. Issuance mechanism and incentive mechanism:
Take Bitcoin as an example. Bitcoins are initially rewarded by the system to miners who create new blocks, and this reward is halved approximately every four years. At the beginning, miners were rewarded with 50 Bitcoins for each new block recorded, and this reward is halved approximately every four years. By analogy, by around AD 2140, newly created blocks will no longer receive rewards from the system. By then, the total number of Bitcoins will be approximately 21 million. This is the total number of Bitcoins, so it will not increase indefinitely.
Another source of incentives is transaction fees. When there are no system rewards for newly created blocks, the miners' income will change from system rewards to transaction fees. For example, when you transfer, you can specify 1% of it as a handling fee to be paid to the miner who records the block. If the output value of a transaction is less than the input value, the difference is the transaction fee, which will be added to the incentive for that block. As long as a given amount of electronic currency has entered circulation, the incentive mechanism can gradually be converted to rely entirely on transaction fees, so there is no need to issue new currency.
Blockchain technology----contract layer: giving the ledger programmable features
Core technology 8. Smart contract:
Smart contract is a set of programmed rules and logic that respond to scenarios. Implemented by decentralized, trusted shared script code deployed on the blockchain. Normally, after the smart contract is signed by all parties, it is attached to the blockchain data in the form of program code, and is recorded in a specific block of the blockchain after being propagated through the P2P network and verified by nodes. Smart contracts encapsulate a number of predefined states and transition rules, scenarios that trigger contract execution, response actions under specific scenarios, etc. The blockchain can monitor the status of smart contracts in real time, and activate and execute the contract by checking external data sources and confirming that specific trigger conditions are met.
The above is what blockchain technologies the editor has brought to you? All content introduced to the core technology of blockchain.

⑹ Blockchain technology will really be the post-InternetHow does it reflect the times?

Yes, blockchain must be a necessary technology in the post-Internet era.

Specifically reflected in its non-tamperability and the ability to achieve decentralization:

1. On the Internet, value and rights can be transferred.

2. A decentralized system can be built so that multiple parties can trust each other.

The first point is that value and rights can be conveyed on the Internet.

We all know that it is easiest to copy and paste on the Internet, and we can easily transfer information. However, if value is transferred on the Internet, the information may be stolen and tampered with. With blockchain technology, the information we put on the Internet can not be tampered with, and we are not afraid of being stolen. As a result, proof of value and equity can be transmitted on the Internet.

There are too many examples of value transfer. For example, Bitcoin is a digital asset that can be transferred at will through the Internet, and does not require a centralized organization to manage it.

But how to understand the transfer of proof of equity? For example, when we go to handle government affairs, we often encounter that I go through a procedure at a window of a department, and then take the paper procedure and go to the window of the next department. Although we have experienced the Internet for so many years, we still have to go through so many processes and handle various paper documents. Why is this?

This is because technology is now very developed, and it is actually very easy to tamper with some electronic documents. Without the combination of blockchain, it is more difficult to trust the electronic information you submit. Therefore, in order for the window department to know that you are yourself and that you are willing to apply for the application, you often need to bring your ID card and then fill in the information in person on site to ensure that you are applying for it out of your own will. This way nothing goes wrong.

Combining blockchain and face recognition, it can be done. The procedures I completed in one department are put on the blockchain, and the other department only needs to complete the procedures on the blockchain. If you check it online, you will know that I have gone through the relevant preparatory procedures myself, and then I can proceed.

In fact, Chancheng District, Foshan, Guangdong is already exploring the use of blockchain technology to achieve "zero errands" in government affairs. It can handle government affairs without leaving home, which has greatly improved Processing benefits.

Let’s talk about the second point: a decentralized system can be built so that multiple parties can trust each other. Before the emergence of blockchain, it was difficult for multiple entities to collaborate, especially online collaboration. This is why cross-border transfers generally take several days and are expensive, with fees of several percent. Because for cross-border transfers, different banks have different account books and use different systems. Therefore, it is often necessary for the personnel responsible for external clearing and settlement of the two banks to synchronize the account books with each other before the transfer can be successful.

YesPeople say that if everyone uses one system, then the question arises, whose system should we use? Other companies don't trust whoever uses it, because whose system often has the authority to modify it, and the operating rights are in the hands of the other party, not to mention issues such as privacy.

But if the system is developed using blockchain, this problem can be solved very well, because everyone uses the same system, and the permissions between each node are consistent, and no one The subject can be changed at will.

In fact, in June 2018, Ant Financial had already used blockchain technology to achieve rapid cross-border remittances. It takes three seconds and the fee is extremely low and can be ignored.

This decentralized solution brought by blockchain establishes a collaborative relationship that is different from previous centralization, solves some insurmountable problems of centralization, and greatly improves efficiency.

If we extend from this direction, think about any company we are in, it will always be upstream or downstream of another company, and it will definitely exchange materials, funds, information, etc. with the other company. A series of interactions etc. Then you will find that many processes are often created for trust. For example, the information sent by the other party needs to be confirmed, and the materials sent by the other party need to be confirmed and checked. Every time you make a new action with the other party, there will be constant questions. Confirmation, feedback. And these are the costs of trust.

But if you use the blockchain, after the data is generated, it is put on the blockchain, and all the upstream and downstream companies in the supply chain obtain the data, then a lot of data does not need to be confirmed repeatedly, so that It can greatly reduce the cost of trust. At the same time, because the data transmitted is credible. Once the data is trusted, the interaction between machines will reduce a lot of trouble in the future. (This is another big topic)

Blockchain technology is widely regarded as an important starting point for achieving a more secure Internet - its advantages mainly come from its technical principles and the current Internet structure. different. In this article we will introduce to you how blockchain can promote network security.

What is blockchain technology?

Blockchain technology is a decentralized distributed ledger system. You can put any digital assets into the blockchain, regardless of any industry. It uses a series of time-stamped immutable records to save information, managed by a cluster of computers. Different transactions can be tracked through these records, which are separated by blocks and connected by cryptographic chains. At the same time, the data does not belong to a certain computer or an individual, but is jointly owned by multiple users within the entire system.

Once the information is confirmed, the encoded data cannot be changed and will become a permanent block that is added to the chain formed by other blocks that have been verified. Initially this technology was designed for cryptocurrency, but now we can see that blockchain technology is used in many fields, especially the InternetThere is huge potential in security as it can be used to prevent cyberattacks, data breaches, identity theft or malicious transactions, keeping data private and secure.

As a lower-level technology, blockchain can provide beneficial solutions for different industries. Its main features are:

Blockchain has a democratized network with no central authority. It is public domain, so no single organization can enter the blockchain system to manipulate any information.

Blockchain is a decentralized system that does not belong to any one entity. Data in the blockchain system can be stored encrypted.

Anything stored in the blockchain is immutable, preventing human tampering or manipulation of the information. For example, with blockchain, it is possible to hold a completely transparent election with immediate results. People can vote at home, and the results can be counted immediately.

Blockchain is transparent - anything built and stored in the blockchain is publicly accessible. The data stored inside can also be tracked, creating a higher standard of accountability for those who use the system.

How does blockchain technology promote network security?

Internet of Things and Edge Computing

With the development of Internet of Things and edge computing, more and more data Distributed across edge computing and storage devices for real-time, on-demand access, meaning data is processed and stored closer to the source. Blockchain provides a secure solution for IoT and Industrial IoT through tighter authentication, improved data attributes and flows, and more advanced record management systems.

In terms of IoT devices, blockchain technology, based on its decentralized architecture, can provide security for remote IoT devices and protect them from hacker attacks. Smart contracts can provide secure verification for transactions in a blockchain environment, and blockchain can be used to manage IoT activities.

Data access control

Because one of the original goals of blockchain was to enable public access, it has no access controls or restrictions. However, various industries now use private blockchain systems to ensure data confidentiality and secure access control. The blockchain’s full encryption ensures that data – whether part or all of it – cannot be accessed by outsiders, especially when it is being transferred.

DDoS Attack

The target of a Distributed Denial of Service (DDoS) attack is usually a server that is attacked by multiple infected computer systems, causing the system to fail through denial of service. slow down, eventually causing the system to overload or crash. If blockchain is integrated into a security system, the target computer, server, or network becomes part of a decentralized system that protects these machines from attacks.

Human communication

Using a platform based on blockchain technology for communication, enterprises can obtain higher security, and this technology can resist malicious attacks. Whether in personal, business or highly confidential communications, consumers can gain the confidentiality of communications without fear of cyber attacks. Blockchain can handle public key infrastructure (PKI) better than ordinary encryption applications, so many companies now want to develop blockchain private communication applications.

Public Key Infrastructure

There is an increased focus on securing computers and online credentials, and blockchain technology can help in this regard. PKI relies on third-party certification authorities to secure communications applications, emails, and websites. These issuing authorities, which issue, revoke or store key pairs, are often targeted by hackers, who often use fake identities to try to access encrypted communications. When these keys are encoded on the blockchain, it minimizes the possibility of generating false keys or identity theft because the identity of the legitimate account holder is already verified on the application, making any intrusion, spoofing, or identity theft Thefts are instantly identifiable.

Domain Name System

Using the blockchain method to store the Domain Name System (DNS) can comprehensively improve security. Because it is no longer a single, risky target, it can prevent malicious activities by hackers from bringing down DNS service providers.

Blockchain, the future of network security

As we continue to deepen our understanding of blockchain, more and more people are investing in the application and research and development of blockchain technology. , this technology is slowly maturing. In the past two years, the application of blockchain in different industry scenarios has increased, as well as the country’s policy guidance on blockchain technology. Blockchain has changed dramatically and is no longer synonymous with cryptocurrency.

Blockchain technology may be born of cryptocurrency, but its value is by no means limited to cryptocurrency. Blockchain is a safe and reliable technology that, once integrated into mainstream security measures, can bring many practical benefits to advancing cybersecurity.

As hackers continue to create new and more sophisticated ways to steal and attack data, the threat to network security is intensifying, and blockchain technology is likely to become the forefront of network security in the next few years. To a certain extent, today’s blockchain is the future of network security.

My understanding is that blockchain is a technology, and the Internet is just a carrier or a communication channel for information integration. It should not be a post-Internet era.

Blockchain can be truly fair and open, and what has happened will not be tampered with when recorded.

Blockchain is decentralized, cannot be cracked, and uniqueness is irreplaceable

⑺ The biggest advantage of the blockchain era over the Internet era is that it is trustworthy

In the traditional Internet era, the architecture of the trust system relies on long-term accumulation and large costs. And JinwoThe birth of Wo Network Technology's blockchain + big data technology uses code to build a lowest-cost trust method.

Only using the general ledger technology of the blockchain for accounting, it can be a company or an individual, with exclusive write permission to the blockchain. This chain is different from other distributed storage solutions. Big difference. Traditional finance is trying to experiment with private blockchains, while applications of public blockchains such as Bitcoin have been industrialized, and application products of private blockchains are still being explored.

Distributed ledger:

Different from traditional distributed storage, the uniqueness of blockchain distributed storage is mainly reflected in two aspects: Aspects: First, each node of the blockchain stores complete data according to the block chain structure. Traditional distributed storage generally divides the data into multiple parts for storage according to certain rules.

Second, the storage of each node in the blockchain is independent and has equal status. It relies on the consensus mechanism to ensure the consistency of storage, while traditional distributed storage generally synchronizes data to other backup nodes through the central node. . No node can record ledger data independently, thus avoiding the possibility of a single bookkeeper being controlled or bribed to record false accounts.

There are also enough accounting nodes. In theory, unless all nodes are destroyed, the accounts will not be lost, thus ensuring the security of the accounting data.

⑻ Introduction to blockchain technology What is blockchain technology

1. Blockchain technology is one of the top ten typical judicial technology applications on the Internet.

2. 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.

3. Generally speaking, the blockchain system consists of data layer, network layer, consensus layer, incentive layer, contract layer and application layer.

4. Among them, the data layer encapsulates the underlying data blocks and related data encryption and timestamps and other basic data and basic algorithms; the network layer includes distributed networking mechanisms, data dissemination mechanisms and data The verification mechanism is obvious; the consensus layer mainly encapsulates various consensus algorithms of network nodes; the incentive layer integrates economic factors into the blockchain technology system, mainly including the issuance mechanism and distribution mechanism of economic incentives; the contract layer mainly encapsulates various Class scripts, algorithms and smart contracts are the basis of the programmable features of the blockchain; the application layer encapsulates various application scenarios and cases of the blockchain. In this model, the chain block structure based on timestamps, the consensus mechanism of distributed nodes, economic incentives based on consensus computing power, and flexible programmable smart contracts are the most representative innovations of blockchain technology.

5. DistrictThe consensus mechanism of the blockchain has the characteristics of "the minority obeys the majority" and "everyone is equal". "The minority obeys the majority" does not entirely refer to the number of nodes, but can also be computing power, the number of shares, or other characteristics that computers can compare. quantity. "Everyone is equal" means that when a node meets the conditions, all nodes have the right to give priority to the consensus result, which will be directly recognized by other nodes and may eventually become the final consensus result. Taking Bitcoin as an example, Caizihe uses proof of work. Only by controlling more than 51% of the accounting nodes in the entire network can it be possible to forge a non-existent record. When there are enough nodes joining the blockchain, this is basically impossible, thus eliminating the possibility of fraud.