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① Does blockchain have compliance risks?

Blockchain technology itself does not violate any laws and regulations, so there are no compliance risks. However, in the actual application process, enterprises or individuals using blockchain technology need to comply with relevant legal and regulatory requirements.
For example, in China, the use of blockchain technology to conduct financial transactions or raise funds needs to comply with relevant laws and regulatory policies. In addition, if users' sensitive personal information is retained on the blockchain, it must also comply with relevant laws and regulations such as data protection.
Therefore, enterprises and individuals who adopt blockchain technology in field applications not only need to understand and comply with existing legal operations and regulations, but also need to pay close attention to the development trends of technology and regulations and make timely decisions. Adjustments and changes accordingly. Only by operating and conducting business in compliance with regulations can enterprises develop better and gain lasting competitive advantages.

② Comprehensive interpretation of blockchain and Bitcoin, teach you to understand the relationship between the two, and be prepared for trouble

When talking about blockchain, the word "Bitcoin" is often inseparable. Because today's cryptocurrencies are all issued in the name of blockchain, some people easily confuse the two concepts. Next, Kelian Cloud Technology will comprehensively explain the difference between blockchain and Bitcoin and teach you to understand the relationship between the two.

Blockchain is a distributed account. Simply put, it is a decentralized ledger that can be viewed and joined by many people. For example, each block is equivalent to each knot on a rope. When each new transaction enters the blockchain, it means that something has happened. To mark the occurrence of something, a symbol will be used. Tie a knot and record detailed information on the specific knot.

Bitcoin uses blockchain to realize value storage and transactions. In addition, the technical difficulty of the blockchain itself is not the most difficult. The most difficult thing is its application scenarios and the regulatory issues it will face. .

There are three classifications of blockchain, namely public blockchain, private blockchain, and joint blockchain; the other classification is without authority and permission.

Therefore, cryptocurrencies use blockchain technology, but blockchain technology is not exclusive to cryptocurrencies

When the financial crisis came, some investors chose to invest in cryptocurrencies. In order to avoid corresponding asset risks, thanks to the mechanism of blockchain to solve trust problems, this technology has been applied in financial management and transactions. The main manifestation is that blockchain can track various types of transactions and can also play a role in anti-counterfeiting and traceability in various scenarios. Issues such as copyright, trademark, and academic fraud have been exposed.

In addition, blockchain technology can also simplify transactions, make the entire transaction process open and transparent, and track every link of the transaction event to ensure that both parties have a certain degree of trust.

An open source blockchain network can ensure trust when "mining" andIt has the characteristics of being tamper-proof. When the networked computers go through sophisticated algorithms and the correct answer comes out, the "minor workers" will get mining rewards and can use servers all over the world. However, the whole process is still very energy-consuming.

It may be this misunderstanding that causes the public to confuse the concepts of Bitcoin and blockchain. Although more than 90% of current blockchain projects have issued coins, there are very few projects that can actually be implemented. In addition, the crazy mining practice of Bitcoin wastes graphics cards and electricity to a large extent.

Bitcoin is an open source version of blockchain technology, that is, a network developed for everyone. It is popular for its decentralization advantages. However, as a public blockchain, Bitcoin However, mining consumes a lot of computing power, resulting in serious power consumption in many countries.

Therefore, for an emerging technology, it is best not to blindly trust or invest in it. Only by recognizing its true purpose can you see everything objectively and be prepared.

③ How is the security of blockchain? What are the risks of blockchain?

The hottest topic at the beginning of the new year is blockchain, but there are many more. People are skeptical about its security and risks, so how about the security of blockchain? What are the risks of blockchain? Below we will give you the answers one by one. I hope it will be helpful to you after reading them.
How is the security of blockchain Anyuan?
First of all, blockchain is a distributed database technology. Distributed technology mainly refers to storage architecture. The distributed architecture adopted by the blockchain not only stores the ledger data on each node, but also each node must contain the data of the entire ledger. This completely distributed architecture brings extremely high security, and no one can destroy all nodes at the same time.
Secondly, blockchain technology can achieve tamper resistance through "blocks" and "chains". The unit of data storage in the blockchain is the block. When each block is generated, it must contain the unique "characteristic value" of the previous block (which can be regarded as the ID card of the block). Each block is generated strictly according to the The order of time is lined up to form a "chain".
Security is a major feature of blockchain technology. However, from the perspective of privacy protection, the block chain emphasizes openness and transparency, and any node has the right to operate according to the consensus algorithm, so it is not suitable for scenarios where data privacy needs to be protected.
What are the risks of blockchain?
1. Technical risk: For example, the launch of Ethereum was once popular, but because it is a digital currency with smart contracts, it brings the risk of hacker attacks due to possible loopholes in smart contracts. THEDAO, the largest crowdfunding project in Ethereum, was hacked and lost more than $60 million.
2. Legal risks: The legality issues of digital currency issuance, notarization and confirmation of rights, and legality issues of evidence, including legality issues of smart contracts, digital bills, accounting and liquidation, and equity crowdfunding, are currently in my country and The rest of the world is still legally blank.
3. Crime risk: Using digital currency to abscond with the money, using digital currency to carry out money laundering and illegal gambling, using smart contracts and digital bills designed to defraud profits, using blockchain technology to commit anonymous crimes, etc., due to The current regulatory gap may create huge criminal risks.
The above is what the editor brings to you. How about the security of blockchain? What are the risks of blockchain? of the entire content.

④ How to avoid risks when investing in blockchain

The risks and returns of any investment are directly proportional. The greater the risk, the greater the return. The key is whether you dare to participate. Of course, there are too many uncertainties in the current blockchain industry, not because of the instability of the technology, but more because of some greedy people who have evil intentions and are hard to guard against.

Let me tell you my opinion. Bitcoin is currently the most popular blockchain derivative currency, and there is no one other. Then there are all kinds of other altcoins following closely behind. If you hold some Bitcoins now, but you are short Bitcoin, this is actually equivalent to creating a risk, and you are facing this risk. In the normal way, you can hardly make a profit by shorting Bitcoin, unless you do some I have used up-and-down options to hedge risks. I have done this in Speed ​​New Europe. They are all short-term options. Long-term options are not recommended for everyone, and few platforms can do it. Bitcoin is not a two-way operation like foreign exchange, and there are opportunities for profit in both ups and downs. When you are bullish, you can buy or hold the currency. When you are bearish, you can dump the currency. When you are holding the currency, you can only hedge by buying options, so the risk is relatively higher.

According to the current Bitcoin market, if this position makes a bottom at most, it will go up and touch the upper edge of the box. To put it simply, the fluctuations in this range will increase. If you are on the sidelines, you can wait until it falls to the lower edge of the box and try to buy it. You must set a stop loss, otherwise you will be buried in confusion. If you think Bitcoin is too expensive, it is recommended to find some options to satisfy your addiction.

⑤ Why Segregated Witness makes hardware wallets more secure

Every veteran in the currency circle knows that the block size of Bitcoin is 1M bytes. This means that, given the fact that the transaction processing efficiency is fixed, if there are more transactions to be confirmed, the longer it will take for the transaction to be confirmed, seriously affecting the Bitcoin transaction experience.

Friends who have experience in Bitcoin transactions should know that Bitcoin transfer transactions are very slow to be confirmed. The frequent congestion of the Bitcoin network has been criticized by many people. The congestion of the blockchain network will inevitably lead to problems such as slow transfer times and high transfer fees.

Segregated Witness was proposed to solve this problem.

The full English name of Segregated Witness is Segregated Witness, abbreviated as SegWit, which means to isolate the verification information and then process the verification information separately.

In order to allow the blockchain to carry more transaction volume, Segregated Witness was designed, and the information on the block is divided into transaction information and witness information.

The transaction information is who transferred how much money to whom at what time. The witness information is the signature information of the transaction, which is used to verify whether the transaction initiator has the authority to use these digital currencies.

When Satoshi Nakamoto designed Bitcoin, he directly placed these two pieces of information in the block. The witness information occupies about two-thirds of the space, so one block cannot carry it. More transaction information. Ordinary users only need to know the transaction information, and only miners need to verify the witness information.

In this way, we can take the witness information out of the block, put it in another space, and hand it over to miners for verification. Only transaction information is recorded in the block, so the block is not changed. Under the premise of reducing the size, the block can also carry more transaction information. This achieves the purpose of block expansion, improves the transaction efficiency of the network in the Bitcoin block, speeds up transactions, and reduces transaction fees.

For hardware wallets, the security impact of Segregated Witness is huge.

Hardware wallets are not stored on the blockchain and do not have direct access to the Bitcoin network. When a user needs to use a hardware wallet client to construct a Bitcoin transaction that sends a certain amount of money to a certain address, if the input and output information of the transaction can be confirmed to be true, the transaction data can be sent to the hardware wallet and the transaction signed.

The signature data of Segregated Witness needs to carry the transaction input amount, and by extracting the output amount from the transaction output, the handling fee for this transaction can be calculated.

But before the implementation of Segregated Witness, the data sent to the hardware for signature did not include the amount of the transaction input. The handling fee could not be calculated by the data on the hardware itself, which would allow hackers to take advantage of it. opportunity. If a hacker uses too many transaction inputs to construct a transaction, users may incur huge handling fees and cause hardware wallet users to lose a lot of money while ensuring that the transaction outputs are all correct.

Happily, LUBANSO hardware wallet will soon support Segregated Witness. By then, users of LUBANSO X1 hardware wallet can reduce transaction fees, increase transaction confirmation speed, and reduce the risk of fee attacks.

⑥ Currency security is the key point. What are the security measures for digital currencies?

Contract transactions of digital currencies are not safe. There are still many vulnerabilities in digital currency trading platforms. For example, the most common ones are the following six:

1. Denial of Service Attack

Denied Service attacks are currently the most important attack methods against digital currency trading platforms.Attackers use denial-of-service attacks to prevent normal access to the trading platform, and because users cannot accurately distinguish the extent of the attack, they often cause panic transfers of assets, thus causing certain losses.

⑦ How does blockchain technology protect the privacy and rights of information subjects

Privacy protection methods can be divided into three categories:
First, transaction information Privacy protection for transaction senders, transaction recipients, and transaction amounts, including currency mixing, ring signatures, and confidential transactions.
The second is privacy protection for smart contracts, and protection solutions for contract data, including zero-knowledge proof, multi-party secure calculation, homomorphic encryption, etc.
The third is the privacy protection of data on the chain, which mainly includes solutions such as ledger isolation, private data and data encryption authorized access.
Extended information:
1. Blockchain encryption algorithm isolates identity information and transaction data
1. Transaction data on the blockchain, including transaction address, amount, transaction time, etc., are open, transparent and queryable . However, the identity of the user corresponding to the transaction address is anonymous. Through the blockchain encryption algorithm, the separation of user identity and user transaction data is achieved. Before the data is saved on the blockchain, the user's identity information can be hashed, and the resulting hash value is used as the user's unique identifier. The user's hash value is stored on the chain instead of the real identity data information. Transaction data is bundled with hash values ​​rather than user identity information.
2. Therefore, the data generated by users is real. When using these data for research and analysis, due to the irreversibility of the blockchain, no one can restore the name, phone number, and email address of registered users through hash values. and other private data, playing a role in protecting privacy.
2. Blockchain "Encrypted Storage + Distributed Storage"
Encrypted storage means that a private key must be provided to access data. Compared with ordinary passwords, private keys are more secure and almost impossible to be cracked by violence. . Distributed storage and decentralized features reduce the risk of all data being leaked to a certain extent. However, with centralized database storage, once the database is attacked by hackers, all data can easily be stolen. Through "encrypted storage + distributed storage", users' data privacy can be better protected.
3. Blockchain consensus mechanism prevents individual risks
The consensus mechanism is a mechanism for blockchain nodes to reach a consensus on block information across the entire network, which can ensure that the latest blocks are accurately added to the blockchain and node storage The blockchain information is consistent and unforked, which can resist malicious attacks. One of the values ​​of the blockchain lies in the consensus governance of data, that is, all users have equal management rights to the data on the chain. Therefore, the risk of individual mistakes is first eliminated from the operation. Data decentralization is solved through the network-wide consensus of the blockchain, and zero-knowledge proofs can be used to solve verification problems and realize the scenario of using user privacy data in a public decentralized system. While meeting the needs of the Internet platform, it also So that part of the data is still only in the hands of the user.
Four.Blockchain Zero-Knowledge Proof
Zero-knowledge proof means that the prover can make the verifier believe that a certain assertion is correct without providing any useful information to the verifier, that is, the prover can fully prove If you are the legal owner of certain rights and interests and do not leak relevant information, that is, the "knowledge" you give to the outside world is "zero". By applying zero-knowledge proof technology, data correlation verification can be achieved in the context of ciphertext, and data sharing can be achieved while ensuring data privacy.

⑧ Does blockchain have compliance risks?

Yes, the application of blockchain technology may involve compliance risks.
First of all, in some countries and regions, governments or regulatory authorities may take different stances on digital currencies and other assets based on blockchain technology, and there will be a certain degree of legal, compliance and policy risks. . For example, some countries restrict or prohibit the use of digital currencies and other Bitcoin or blockchain derivatives. Therefore, when choosing the scope of application of blockchain technology, the local legal and regulatory environment needs to be considered.
Secondly, there are trust issues between participants in private chains or alliance chains, and there are also compliance risks in the construction of trust mechanisms. For example, in the financial field, banks or other financial institutions need to consider which trust model to use when using blockchain technology to comply with social ethics and potential legal requirements. For money-related transactions, legal requirements such as anti-money laundering and counter-terrorism must also be met.
In addition, due to the immutable and public nature of blockchain technology, it may inadvertently leak personal privacy, business secrets and other confidential information, causing privacy data leaks and security risks.
Therefore, enterprises and technology companies should carefully assess potential compliance risks and formulate appropriate compliance security measures, such as complying with legal and regulatory requirements, establishing a sound privacy protection mechanism, and strengthening privacy data protection in multiple dimensions. To ensure compliance and data security of blockchain technology applications.

⑨ What is Segregated Witness in the blockchain?

How does Segregated Witness operate? In fact, it is not that simple~ Segregated Witness is a method for blockchain expansion, and it has been used in Successfully implemented on Litecoin and Bitcoin. At present, each block on the blockchain not only records the specific information of each transfer transaction, that is, at which point in time the account received or transferred how many Bitcoins, but also contains the digital signature of each transaction, which is used to verify the transaction. Legality of transaction. When miners package blocks, they need to use digital signatures to verify each transaction one by one. Only after confirming that there are no problems will the transaction be recorded in the block. But for an ordinary user, he only cares about how many assets each account has, and does not need to verify each transaction one by one. Segregated Witness takes out the digital signature information in the block so that each block can carry more transactions, thereby achieving the purpose of expansion.

⑩ What risks does the blockchain face and need to be addressed

Although the blockchain industry is experiencing rapid development driven by the influx of capital and talent, as an emerging industry, Its security breaches are frequentThe warning situation has raised concerns about the risks of blockchain.

Yu Kequn, director of the National Information Technology Security Research Center, pointed out that the emergence of blockchain has brought a lot of expectations to people regarding issues such as privacy exposure, data leakage, information tampering, and online fraud. However, there are still many challenges in the security of blockchain.

Li Bin, assistant director of the China Information Security Evaluation Center, analyzed that the current blockchain is divided into three types: public chain, private chain, and alliance chain. No matter which type has different advantages in algorithms and protocols, There are security challenges in many aspects such as , usage, time limits and systems. What is particularly critical is that the current blockchain is still facing the 51% attack problem, that is, a node has the ability to successfully tamper and forge blockchain data by mastering more than 51% of the calculation examples in the entire network.

It is worth noting that in addition to the risk of external malicious attacks, the blockchain also faces the threat of its endogenous risks. Yu Kequn reminded that how to build a complete secure application system around the equipment, data, applications, encryption, authentication and permissions of the entire blockchain application system is an important issue that all parties must face.

Wu Jiazhi also analyzed that as an emerging industry, practitioners in the blockchain industry lack security awareness, resulting in the current blockchain-related software and hardware having a low security factor and a large number of security vulnerabilities. In addition, , there are many links in the entire blockchain ecosystem. In comparison, the relevant security practitioners are dispersed and it is difficult to form a joint force to solve the problem. Meeting the above challenges requires systematic solutions.

Content source China News Service