区块链技术人员可以修改吗知乎,区块链技术人员可以修改吗为什么

请查看相关英文文档

㈠ Can a digital content be revised after it is uploaded to the blockchain project?

The answer is: It can be achieved.

This question originally came from a PRESSone user, but it is actually a common question in the blockchain + content industry.

PRESSone CTO’s answer is as follows:

What Huo Ju said is concise and concise, and programmers may already understand it when they see this.

As for those of you who don’t know much about technology, what should you do if you still don’t know? I will share my understanding here. If there are any deviations, please comment and correct me.

When using blockchain technology to serve the content industry, a key issue will be involved:

Is the content on the chain?

In the implementation plan of PRESSone, the content is not uploaded to the chain, only the hash of the content is uploaded to the chain. As we all know, even if the punctuation is simply changed in a piece of content, the hash after re-hashing will be different.

But the real situation is that users will always encounter situations where articles are revised and pictures are adjusted. Although the article/picture has been revised, from the user's perspective, it is still the same article/picture.

What method should be used to resolve the above contradictions?

Not satisfied with users? It's not OK.

Turn the immutable blockchain network into "modifiable"? Very not OK.

Below, I use Huo Ju’s answer to speculate on how PRESSone will implement content revision. It is emphasized for the second time that in the PRESSone network, digital content is not directly uploaded to the chain, but the hash of the digital content is uploaded to the chain.

Taking an article as an example,

When PRESSone opens the "modify content and resubmit signature" function entrance to users through the web or app, and users can use it as needed, it will happen The following situation occurs:

At this time, there are two versions on the chain, A and B.

When a user accesses the article on PRESSone's web or app, PRESSone will present the latest version to the user.

In this way, PRESSone realizes the need for content revision from the user's perspective. From the perspective of PRESSone, only one version association and pointing is done.

Can you understand what I say?

㈡ What is blockchain technology and how it changes business and financial models

Blockchain technology is a Distributed ledgerThis technology allows multiple participants to jointly maintain a secure, transparent and immutable record on a decentralized network. Blockchain technology was originally designed for the digital currency Bitcoin, but is now widely used in many other fields.

The core features of blockchain technology include:

Decentralization: Blockchain has no central control agency, and data is distributed on various nodes in the network, which makes it decentralized. The centralization feature reduces the risk of single points of failure.

Transparency: Transaction records on the blockchain are public to all participants, and anyone can view these records. This helps increase trust and reduce the risk of fraud.

Immutable: Once a transaction is recorded on the blockchain, it cannot be easily modified or deleted. This guarantees data integrity and security.

Smart contracts: Transactions on the blockchain can be automatically executed to implement "smart contracts", which automatically execute corresponding operations when specific conditions are met. This helps simplify complex business processes and reduce costs.

Blockchain technology has had a profound impact on business and financial models, which is mainly reflected in the following aspects:

Reducing costs: Blockchain technology can reduce intermediary links and reduce costs. Transaction costs and operating costs. For example, by adopting blockchain for cross-border payments, remittance fees can be significantly reduced.

Improving efficiency: The automation and smart contract features of blockchain technology help improve the efficiency of business processes, reduce manual intervention, and reduce error rates.

Enhance trust: The transparency and non-tamperability of blockchain technology help to establish a reliable trust system, reduce the risk of fraud, and provide better protection for commercial activities.

Innovative business models: Blockchain technology has spawned many new business models, such as decentralized finance (DeFi), digital asset trading, supply chain finance, etc. These new business models have brought disruptive changes to existing industries.

In short, blockchain technology, as an emerging technical means, is gradually changing the landscape of business and finance. With the continuous development of technology and the in-depth promotion of applications, blockchain is expected to have a more extensive and far-reaching impact in the future

ㅢ Can blockchain technology guarantee the authenticity of original information

< p>Theoretically, blockchain technology can ensure the authenticity of original information. One of the biggest features of the blockchain is decentralization. The information recorded on the blockchain cannot be tampered with and will be recorded on the blockchain forever.
Up to now, no research institution or individual has claimed to be able to change the immutable characteristics of blockchain.
DECENT, a decentralized content publishing platform, takes advantage of this feature of the blockchain to protect users’ property rights.

㈣ The technical characteristics of blockchain include: ( ). a Decentralized b Traceability c Open and transparent d Immutable

BlockchainTechnical features include decentralization, non-tamperability, consensus trust mechanism, openness, anonymity, cross-platform, etc.

6. Cross-platform

Similar to the TCP/IP protocol of the Internet, blockchain can also be regarded as a basic communication protocol. The cooperation of other mechanisms together constitutes the value Internet based on blockchain. Nodes on the blockchain network operate independently based on common algorithms and data structures. They mainly consume computing resources and have nothing to do with the platform. Computing nodes can be deployed on any platform.

It can be said that the characteristics and development of blockchain come from the soil where it was born - the development of Internet technology and the rise of cloud computing and big data.

㈤ Will the blockchain be attacked by hackers?

Blockchain is a "consensus" implementation technology. Through the blockchain, all transactions on the Internet can be recorded for users of the blockchain to witness and achieve "consensus", and the information content on the chain "cannot be tampered with." This "non-tamperability" increases the cost of malicious tampering of content through the existence of multiple copies in the system. “Blockchain is not a privacy solution. It is a verification solution. It is very important to understand this. Blockchain can definitely be combined with other technologies to create various systems that help users better manage their data, but These systems cannot prevent data leaks." Blockchain technology can solve the problem of identity hacking because if your identity is controlled by a private key and you keep that private key yourself, then there is no way to hack your identity. Or at least the likelihood of an attack is very low compared to traditional database systems." Blockchains are all based on a mechanism, and the information on the blockchain is immutable. "One of the greatest values ​​of blockchain is that you You cannot change the value at will as an administrator. No one controls the blockchain. This is short-term. "Technically speaking, blockchain alone may not be the solution to data hacking and identity theft, but it is still a major technological leap in personal information security, and information security changes from cyberspace to routine.

㈥ How does blockchain prevent data tampering

Blockchain is a new application model of computer technologies such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithms.

Different from traditional distributed storage, the uniqueness of blockchain's distributed storage is mainly reflected in two aspects: First, each node of the blockchain follows the block chain format. The structure stores complete data. Traditional distributed storage generally divides the data into multiple parts for storage according to certain rules. Second, each node of the blockchain is independent and has equal status, relying on the consensus mechanism to ensure the consistency of storage. , while traditional distributed storage generally synchronizes data to other backup nodes through a central node.

No node can record ledger data independently, thus preventing a single bookkeeper from being controlled or bribed to record false records. possibility of accounting. Also due to the accounting nodeThere are enough. In theory, unless all nodes are destroyed, the accounts will not be lost, thus ensuring the security of the account data.

The transaction information stored on the blockchain is public, but the account identity information is highly encrypted and can only be accessed with the authorization of the data owner, thus ensuring the security and personalization of the data. privacy.

Blockchain proposes four different consensus mechanisms, which are suitable for different application scenarios and strike a balance between efficiency and security.

Based on the above characteristics, this data storage technology can perfectly prevent the possibility of data tampering. In reality, it can also be applied to many fields. It is better than our electronic certificate storage technology in electronic contract signing. provides a safer and more reliable guarantee.

㈦ Can the data of the blockchain be modified

The ideal state cannot be modified. The blockchain can only be added but not modified or deleted. Although Ethereum can modify and delete account data, it is only at the state machine level. It is a state transition through transactions or events. The previous state will not be modified or deleted.
If it is a POW algorithm: such as Bitcoin, etc. Users tend to synchronize new chains with the best computing power. And each transaction will be delayed by 6 blocks. So whenever we create a fake block, we usually need to make all the POW of the first six blocks at the same time, and the cumulative POW of these 6 blocks needs to be larger than the real main chain (the main chain is jointly maintained by honest users) Only with high POW can you guarantee success every time, so you need to master the computing power of 51

㈧ Is Atomic Coin a scam?

Is Atomic Coin a scam? Atomic Coin claims that one of its biggest advantages compared to Bitcoin is "decentralization." The so-called blockchain technology means that it is not controlled by a certain person or organization. And where did the tens of billions of Atomic coins that Atomic Coins have "given away" come from? The limited 100 billion Atomic coins are now "generated" should have exceeded 60 billion, which is at least one-sixth of them. The fifth one is derived from the Atomic Love Company.
It is roughly estimated that tens of billions of atomic coins have been "mined". At this rate, 100 billion coins will be mined in less than a year. In fact, Atomic Coin is not essentially a virtual currency under blockchain applications. It is just that Atomic Love technicians can change the relevant main parameters at will, and have as many as they want. Such a currency is the legendary gas currency, such a "currency" Actually worthless!

(8) Can blockchain technicians modify it? Further reading
It is claimed to be the "future world currency" and the atomic currency is a virtual currency generated by blockchain technology. In fact, Atomic coins are ordinary electronic data. Data and "yield" can be modified at will, and there is no decentralization. The number, "value" and "digital power" of atomic coins are all controlled by the operating company, which is suspected of fraud.
Atomic Love claims that registration is free, but in fact activation requires payment.Yes, after reactivation, you can "share" it with friends to add and get rewards, and several different levels match 8% to 32% different rewards.

㈨ What are the characteristics of the blockchain?

Characteristics of the blockchain

One of the four major characteristics of the blockchain: cannot be tampered

The most easily understood feature of blockchain is that it cannot be tampered with.

Immutability is formed based on the unique ledger of "block+chain": blocks containing transactions are continuously added to the end of the chain in chronological order. To modify the data in a block, all blocks after it need to be regenerated.
One of the important functions of the consensus mechanism is to make it extremely costly to modify a large number of blocks, making it almost impossible. Taking blockchain networks that use proof-of-work (such as Bitcoin and Ethereum) as an example, only 51% of the computing power can regenerate all blocks to tamper with data. However, destroying data is not in the self-interest of players with large computing power, and this practical design enhances the reliability of data on the blockchain.
Generally, the transaction data in the blockchain ledger can be regarded as not being "modified", it can only be "corrected" through approved new transactions. The process of modification will leave traces, which is why the blockchain is said to be tamper-proof. Tampering refers to alteration or distortion by false means.
In commonly used files and relational data, the system itself does not record modification traces unless special design is adopted. The blockchain ledger adopts a different design from files and databases. It draws on the actual ledger design - retaining record traces. Therefore, we cannot "modify" the ledger without leaving traces, but can only "amend" the ledger (see Figure 2).

Figure 6: Bitcoin is organizationally decentralized and logically centralized

In envisioning future organizations At the time, the ideal prototype in our minds was often the Bitcoin organization: a fully decentralized autonomous organization. But in practice, for the sake of efficiency and advancement, we will move slightly closer to a centralized organization and eventually find a suitable balance point.

Now, among blockchain projects that create and issue tokens through Ethereum’s smart contracts and operate in a community or ecological manner, the ideal state of many projects is an organization similar to Bitcoin , but the actual situation is between a completely decentralized organization and a traditional company.

When discussing decentralized self-organization, the fourth feature of blockchain, we are actually moving beyond the world of code to involve human organization and collaboration. Now, various discussions and practical explorations have also revealed the significance of blockchain beyond technology: it may serve as infrastructure to support human production organization and collaborative changes. This is another example that blockchain and the Internet are completely isomorphic. The Internet is not just a technology, it has changed people's organization and collaboration.

In general, Ethereum brings blockchain to a new stage. When discussing Ethereum, if we want to summarize two keywords, then these two keywords are smart contracts and tokens; and if I can only talk about one, I will choose "token". I would rather look to the history of the Internet to find its meaning, repeating the previous analogy: tokens, as representations of value, play a similar role to HTML. After having HTML, what kind of website we build depends entirely on our imagination.